Biol20N02 2016 - Revision history

imported>Weigang: /* May 17. Paired & Two sample t-tests */

2016-05-24T12:12:02Z

May 17. Paired & Two sample t-tests

imported>Weigang: /* May 17. Paired & Two sample t-tests */

2016-05-24T12:04:09Z

May 17. Paired & Two sample t-tests

← Older revision		Revision as of 12:04, 24 May 2016
Line 439:		Line 439:
	\|		\|
	* (5 pts) Ostriches live in hot environments. To test if ostriches could reduce brain temperature relative to body temperature, the mean body and brain temperature (in Celsius) of six ostriches was recorded in the following table.		* (5 pts) Ostriches live in hot environments. To test if ostriches could reduce brain temperature relative to body temperature, the mean body and brain temperature (in Celsius) of six ostriches was recorded in the following table.
	# State the null and alternative hypotheses <~~ocde~~>Answer: H0: there is no difference in body and brain temperature; H1: the brain temperature is different from the body temperature</code>		# State the null and alternative hypotheses <code>Answer: H0: there is no difference in body and brain temperature; H1: the brain temperature is different from the body temperature</code>
	# Make a data frame and visualize with a boxplot combined with a stripchart <code>x <- data.frame(id = 1:6, body = c(), brain = c())</code>		# Make a data frame and visualize with a boxplot combined with a stripchart <code>x <- data.frame(id = 1:6, body = c(), brain = c())</code>
	# Test normality of data points by showing qqnorm() and qqline() plots (separate for two column) <code>qqnorm(x$body); qqline(x$body)</code>		# Test normality of data points by showing qqnorm() and qqline() plots (separate for two column) <code>qqnorm(x$body); qqline(x$body)</code>

imported>Weigang: /* May 17. Paired & Two sample t-tests */

2016-05-24T12:03:47Z

May 17. Paired & Two sample t-tests

← Older revision		Revision as of 12:03, 24 May 2016
Line 439:		Line 439:
	\|		\|
	* (5 pts) Ostriches live in hot environments. To test if ostriches could reduce brain temperature relative to body temperature, the mean body and brain temperature (in Celsius) of six ostriches was recorded in the following table.		* (5 pts) Ostriches live in hot environments. To test if ostriches could reduce brain temperature relative to body temperature, the mean body and brain temperature (in Celsius) of six ostriches was recorded in the following table.
	# State the null and alternative hypotheses <ocde>[Answer: H0: there is no difference in body and brain temperature; H1: the brain temperature is different from the body temperature]</code>		# State the null and alternative hypotheses <ocde>Answer: H0: there is no difference in body and brain temperature; H1: the brain temperature is different from the body temperature</code>
	# Make a data frame and visualize with a boxplot combined with a stripchart <code>x <- data.frame(id = 1:6, body = c(), brain = c())</code>		# Make a data frame and visualize with a boxplot combined with a stripchart <code>x <- data.frame(id = 1:6, body = c(), brain = c())</code>
	# Test normality of data points by showing qqnorm() and qqline() plots (separate for two column) <code>qqnorm(x$body); qqline(x$body)</code>		# Test normality of data points by showing qqnorm() and qqline() plots (separate for two column) <code>qqnorm(x$body); qqline(x$body)</code>

imported>Weigang: /* May 17. Paired & Two sample t-tests */

2016-05-24T12:03:04Z

May 17. Paired & Two sample t-tests

← Older revision		Revision as of 12:03, 24 May 2016
Line 439:		Line 439:
	\|		\|
	* (5 pts) Ostriches live in hot environments. To test if ostriches could reduce brain temperature relative to body temperature, the mean body and brain temperature (in Celsius) of six ostriches was recorded in the following table.		* (5 pts) Ostriches live in hot environments. To test if ostriches could reduce brain temperature relative to body temperature, the mean body and brain temperature (in Celsius) of six ostriches was recorded in the following table.
	# State the null and alternative hypotheses		# State the null and alternative hypotheses <ocde>[Answer: H0: there is no difference in body and brain temperature; H1: the brain temperature is different from the body temperature]</code>
	# Make a data frame and visualize with a boxplot combined with a stripchart		# Make a data frame and visualize with a boxplot combined with a stripchart <code>x <- data.frame(id = 1:6, body = c(), brain = c())</code>
	# Test normality of data points by showing qqnorm() and qqline() plots (separate for two column)		# Test normality of data points by showing qqnorm() and qqline() plots (separate for two column) <code>qqnorm(x$body); qqline(x$body)</code>
	# Test if there is significant difference between the body and brain temperature		# Test if there is significant difference between the body and brain temperature <code>t.test(x$body, x$brain, paired = T)</code>
	{\| class="wikitable"		{\| class="wikitable"
	\|-		\|-

imported>Weigang: /* May 17. Paired & Two sample t-tests */

2016-05-18T15:38:11Z

May 17. Paired & Two sample t-tests

imported>Weigang: /* May 17. Paired & Two sample t-tests */

2016-05-18T15:36:27Z

May 17. Paired & Two sample t-tests

@@ Line 438: / Line 438: @@
 |- style="background-color:powderblue;"
+|
-to be posted
+* (5 pts) Ostriches live in hot environments. To test if ostriches could reduce temperature relative to body temperature, the mean body and brain temperature (in Celsius) of six ostriches was recorded in the following table.
 |}
 ===May 24. Final Exam (Comprehensive)===
 ===May 31. Grades submitted to Registrar Office===

imported>Weigang: /* May 17. Paired & Two sample t-tests */

2016-05-17T17:48:36Z

May 17. Paired & Two sample t-tests

← Older revision		Revision as of 17:48, 17 May 2016
Line 428:		Line 428:
	* Import data set: http://diverge.hunter.cuny.edu/~weigang/data-sets-for-biostat/ahus.csv		* Import data set: http://diverge.hunter.cuny.edu/~weigang/data-sets-for-biostat/ahus.csv
	* PLEASE FILL IN TEACHER EVALUATIONS: [http://www.hunter.cuny.edu/te '''Teacher's evaluation''']		* PLEASE FILL IN TEACHER EVALUATIONS: [http://www.hunter.cuny.edu/te '''Teacher's evaluation''']
			* All lecture slides
			** Part 1. [[File:Biostat-part-1.pdf\|thumbnail]]
			** Part 2. [[File:Part-2-distribution.pptx\|thumbnail]]
			** Part 3. [[File:Part-3-frequency.pptx\|thumbnail]]
			** Part 4. [[File:Part-4-t-tests.pptx\|thumbnail]]
	{\| class="wikitable sortable mw-collapsible"		{\| class="wikitable sortable mw-collapsible"
	\|- style="background-color:lightsteelblue;"		\|- style="background-color:lightsteelblue;"

imported>Weigang: /* May 17. Paired & Two sample t-tests */

2016-05-17T17:46:36Z

May 17. Paired & Two sample t-tests

← Older revision		Revision as of 17:46, 17 May 2016
Line 428:		Line 428:
	* Import data set: http://diverge.hunter.cuny.edu/~weigang/data-sets-for-biostat/ahus.csv		* Import data set: http://diverge.hunter.cuny.edu/~weigang/data-sets-for-biostat/ahus.csv
	* PLEASE FILL IN TEACHER EVALUATIONS: [http://www.hunter.cuny.edu/te '''Teacher's evaluation''']		* PLEASE FILL IN TEACHER EVALUATIONS: [http://www.hunter.cuny.edu/te '''Teacher's evaluation''']
	* All lecture slides:
	** Part 1
	** Part 2
	** Part 3
	** Part 4
	{\| class="wikitable sortable mw-collapsible"		{\| class="wikitable sortable mw-collapsible"
	\|- style="background-color:lightsteelblue;"		\|- style="background-color:lightsteelblue;"

imported>Weigang: /* May 17. Paired & Two sample t-tests */

2016-05-17T17:41:48Z

May 17. Paired & Two sample t-tests

← Older revision		Revision as of 17:41, 17 May 2016
Line 428:		Line 428:
	* Import data set: http://diverge.hunter.cuny.edu/~weigang/data-sets-for-biostat/ahus.csv		* Import data set: http://diverge.hunter.cuny.edu/~weigang/data-sets-for-biostat/ahus.csv
	* PLEASE FILL IN TEACHER EVALUATIONS: [http://www.hunter.cuny.edu/te '''Teacher's evaluation''']		* PLEASE FILL IN TEACHER EVALUATIONS: [http://www.hunter.cuny.edu/te '''Teacher's evaluation''']
			* All lecture slides:
			** Part 1
			** Part 2
			** Part 3
			** Part 4
	{\| class="wikitable sortable mw-collapsible"		{\| class="wikitable sortable mw-collapsible"
	\|- style="background-color:lightsteelblue;"		\|- style="background-color:lightsteelblue;"

imported>Weigang: /* May 17. Paired & Two sample t-tests */

2016-05-17T03:01:25Z

May 17. Paired & Two sample t-tests

← Older revision		Revision as of 03:01, 17 May 2016
Line 426:		Line 426:

	===May 17. Paired & Two sample t-tests===		===May 17. Paired & Two sample t-tests===
			* Import data set: http://diverge.hunter.cuny.edu/~weigang/data-sets-for-biostat/ahus.csv
	* PLEASE FILL IN TEACHER EVALUATIONS: [http://www.hunter.cuny.edu/te '''Teacher's evaluation''']		* PLEASE FILL IN TEACHER EVALUATIONS: [http://www.hunter.cuny.edu/te '''Teacher's evaluation''']
	{\| class="wikitable sortable mw-collapsible"		{\| class="wikitable sortable mw-collapsible"

← Older revision		Revision as of 12:12, 24 May 2016
Line 439:		Line 439:
	\|		\|
	* (5 pts) Ostriches live in hot environments. To test if ostriches could reduce brain temperature relative to body temperature, the mean body and brain temperature (in Celsius) of six ostriches was recorded in the following table.		* (5 pts) Ostriches live in hot environments. To test if ostriches could reduce brain temperature relative to body temperature, the mean body and brain temperature (in Celsius) of six ostriches was recorded in the following table.
	# State the null and alternative hypotheses <code>~~Answer:~~ H0: there is no difference in body and brain temperature; H1: the brain temperature is different from the body temperature</code>		# State the null and alternative hypotheses <code>H0: there is no difference in body and brain temperature; H1: the brain temperature is different from the body temperature</code>
	# Make a data frame and visualize with a boxplot combined with a stripchart <code>x <- data.frame(id = 1:6, body = c(), brain = c())</code>		# Make a data frame and visualize with a boxplot combined with a stripchart <code>x <- data.frame(id = 1:6, body = c(), brain = c())</code>
	# Test normality of data points by showing qqnorm() and qqline() plots (separate for two column) <code>qqnorm(x$body); qqline(x$body)</code>		# Test normality of data points by showing qqnorm() and qqline() plots (separate for two column) <code>qqnorm(x$body); qqline(x$body)</code>
Line 462:		Line 462:
	** Beer group: 0.36, 0.46, 0.06, 0.18, 0.25, 0.18, -0.06, -0.14, 0.12, 0.39, 0.17, -0.16, -0.05, 0.19, 0.25, 0.31, 0.17, -0.03, 0.23, -0.03, 0.26, 0.30, 0.11, 0.13, 0.21		** Beer group: 0.36, 0.46, 0.06, 0.18, 0.25, 0.18, -0.06, -0.14, 0.12, 0.39, 0.17, -0.16, -0.05, 0.19, 0.25, 0.31, 0.17, -0.03, 0.23, -0.03, 0.26, 0.30, 0.11, 0.13, 0.21
	** Water group: 0.04, 0, -0.08, -0.12, 0.201, -0.039, 0.10, 0.041, 0.02, 0.236, 0.05, 0.097, 0.122, -0.019, 0.021, -0.08, -0.165, -0.28		** Water group: 0.04, 0, -0.08, -0.12, 0.201, -0.039, 0.10, 0.041, 0.02, 0.236, 0.05, 0.097, 0.122, -0.019, 0.021, -0.08, -0.165, -0.28
	# State the null and alternative hypotheses		# State the null and alternative hypotheses <code>H0: there is no difference in activation time between the two groups; H1: reaction time differs between the two groups</code>
	# Make a data frame and visualize with a boxplot combined with a stripchart		# Make a data frame and visualize with a boxplot combined with a stripchart<code>x <- data.frame(time = c(0.36, 0.46, 0.06, 0.18, 0.25, 0.18, -0.06, -0.14, 0.12, 0.39, 0.17, -0.16, -0.05, 0.19, 0.25, 0.31, 0.17, -0.03, 0.23, -0.03, 0.26, 0.30, 0.11, 0.13, 0.21, 0.04, 0, -0.08, -0.12, 0.201, -0.039, 0.10, 0.041, 0.02, 0.236, 0.05, 0.097, 0.122, -0.019, 0.021, -0.08, -0.165, -0.28), group = c(rep("beer", 25), rep("water",18)))</code>
	# Test normality of data points by showing qqnorm() and qqline() plots (separate for two column)		# Test normality of data points by showing qqnorm() and qqline() plots (separate for two column) <code>qqnorm(x$time[1:25]); qqline(x$time[1:25])</code>
	# Test if there is significant difference between the two groups		# Test if there is significant difference between the two groups<code>t.test(time ~ group, data = x)</code>
	\|}		\|}

	===May 24. Final Exam (Comprehensive)===		===May 24. Final Exam (Comprehensive)===
	===May 31. Grades submitted to Registrar Office===		===May 31. Grades submitted to Registrar Office===

← Older revision		Revision as of 15:38, 18 May 2016
Line 435:		Line 435:
	{\| class="wikitable sortable mw-collapsible"		{\| class="wikitable sortable mw-collapsible"
	\|- style="background-color:lightsteelblue;"		\|- style="background-color:lightsteelblue;"
	! Assignment #10. Due 5/24		! Assignment #10. Due 5/24 (Finalized)
	\|- style="background-color:powderblue;"		\|- style="background-color:powderblue;"
	\|		\|
	* (5 pts) Ostriches live in hot environments. To test if ostriches could reduce temperature relative to body temperature, the mean body and brain temperature (in Celsius) of six ostriches was recorded in the following table.		* (5 pts) Ostriches live in hot environments. To test if ostriches could reduce brain temperature relative to body temperature, the mean body and brain temperature (in Celsius) of six ostriches was recorded in the following table.
	# State null and alternative hypotheses		# State the null and alternative hypotheses
	# Make a data frame and visualize with a boxplot combined with a stripchart		# Make a data frame and visualize with a boxplot combined with a stripchart
	# Test normality of data points by showing qqnorm() and qqline() plots (separate for two column)		# Test normality of data points by showing qqnorm() and qqline() plots (separate for two column)
Line 460:		Line 460:
	\|}		\|}
	* (5 pts) Could mosquitoes detect odor of what people drink? The following data points are the relative activation time (the smaller the quicker) of mosquitoes flying toward volunteers, divided into beer- and water-drinking groups:		* (5 pts) Could mosquitoes detect odor of what people drink? The following data points are the relative activation time (the smaller the quicker) of mosquitoes flying toward volunteers, divided into beer- and water-drinking groups:
	Beer group: 0.36, 0.46, 0.06, 0.18, 0.25, 0.18, -0.06, -0.14, 0.12, 0.39, 0.17, -0.16, -0.05, 0.19, 0.25, 0.31, 0.17, -0.03, 0.23, -0.03, 0.26, 0.30, 0.11, 0.13, 0.21		** Beer group: 0.36, 0.46, 0.06, 0.18, 0.25, 0.18, -0.06, -0.14, 0.12, 0.39, 0.17, -0.16, -0.05, 0.19, 0.25, 0.31, 0.17, -0.03, 0.23, -0.03, 0.26, 0.30, 0.11, 0.13, 0.21
	Water group: 0.04, 0, -0.08, -0.12, 0.201, -0.039, 0.10, 0.041, 0.02, 0.236, 0.05, 0.097, 0.122, -0.019, 0.021, -0.08, -0.165, -0.28		** Water group: 0.04, 0, -0.08, -0.12, 0.201, -0.039, 0.10, 0.041, 0.02, 0.236, 0.05, 0.097, 0.122, -0.019, 0.021, -0.08, -0.165, -0.28
	# State null and alternative hypotheses		# State the null and alternative hypotheses
	# Make a data frame and visualize with a boxplot combined with a stripchart		# Make a data frame and visualize with a boxplot combined with a stripchart
	# Test normality of data points by showing qqnorm() and qqline() plots (separate for two column)		# Test normality of data points by showing qqnorm() and qqline() plots (separate for two column)