SOLUTION: I do know how to get the mean and the standard deviation sort of but not the median. #7 Find the median for the following data. Round your answer to 2 decimal places as nee

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Question 865614: I do know how to get the mean and the standard deviation sort of but not the median.
#7
Find the median for the following data.
Round your answer to 2 decimal places as needed.
49
2
94
54
83
96
32
75
27
26
29
14
4
41
Median =
Points possible: 1
This is attempt 1 of 3.
i need help also on the places too.
#13
The grades for 30 students on the most recent exam are given in the data table below:
Round your answer to 2 decimal places as needed
60
60
60
90
90
60
70
80
60
80
60
80
80
60
70
80
60
60
60
90
60
70
90
80
90
80
60
60
70
90
What is the mean score for the exam? 2160/30= 72 right?

What is the median score for the exam?

What is the standard deviation for the exam?

Points possible: 6
This is attempt 1 of 3.

#14
60 students were surveyed about how many nights in a week they work on homework problems in their MAT142 class. The results of the survey are shown below:
Round your answer to 2 decimal places as needed
5
3
6
2
3
2
7
1
4
6


4
2
4
5
6
6
1
3
2
7


3
1
1
5
6
3
7
5
7
6


5
5
2
4
6
4
6
5
5
3


4
1
4
1
6
3
6
6
5
1


6
1
1
6
5
7
2
4
5
1


What is the mean number of days of homework? 216/60= 3.6 right?

What is the median number of days of homework?

What is the standard deviation for days of homework?

Points possible: 6
This is attempt 1 of 3.

I need it by this friday april 25 at 11:59pm i thank you and will work on some too. i am trying to do the last on #13 and #14 but i can't its too much numbers. i will get confuse on them. so help me and thanks
Answer by ewatrrr(24785)   (Show Source): You can put this solution on YOUR website!


Hi

You MUST have a good calculator or an electronic spreadsheet to do these.

Why??  Because others will and will be able to do all these in minutes.

#7 After sorted, median is (middle-two/2) =   (same applies to #13 and 14)

#13  Mean - 72, Median = 70, SD = 12.15(round off according to Instructions: 2 decimal places)

#14  Mean = 4.05, Median = 4. SD = 1.97 (again round off according to Instructions: 2 decimal places)

Used Sum(x-mean)/(n-1) for Variance and then sqrt(Variance) for SD

49	2		60	60	144		1	9.3025	

2	4		60	60	144		1	9.3025	

94	14		60	60	144		1	9.3025	

54	26		90	60	144		1	9.3025	

83	27		90	60	144		1	9.3025	

96	29		60	60	144		1	9.3025	

32	32		70	60	144		1	9.3025	

75	41		80	60	144		1	9.3025	

27	49		60	60	144		1	9.3025	

26	54		80	60	144		1	9.3025	

29	75		60	60	144		2	4.2025	

14	83		80	60	144		2	4.2025	

4	94		80	60	144		2	4.2025	

41	96		60	70	4		2	4.2025	

	626		70	70	4		2	4.2025	

			80	70	4		2	4.2025	

			60	70	4		3	1.1025	

			60	80	64		3	1.1025	

			60	80	64		3	1.1025	

			90	80	64		3	1.1025	

			60	80	64		3	1.1025	

			70	80	64		3	1.1025	

			90	80	64		3	1.1025	

			80	80	64		4	0.0025	

			90	90	324		4	0.0025	

			80	90	324		4	0.0025	

			60	90	324		4	0.0025	

			60	90	324		4	0.0025	

			70	90	324		4	0.0025	

			90	90	324		4	0.0025	

			2160		4280		4	0.0025	

				   SD 12.1485		5	0.9025	

							5	0.9025	

							5	0.9025	

							5	0.9025	

							5	0.9025	

							5	0.9025	

							5	0.9025	

							5	0.9025	

							5	0.9025	

							5	0.9025	

							5	0.9025	

							6	3.8025	

							6	3.8025	

							6	3.8025	

							6	3.8025	

							6	3.8025	

							6	3.8025	

							6	3.8025	

							6	3.8025	

							6	3.8025	

							6	3.8025	

							6	3.8025	

							6	3.8025	

							6	3.8025	

							7	8.7025	

							7	8.7025	

							7	8.7025	

							7	8.7025	

							7	8.7025	

							243	228.85	

						mean	4.05	1.9695	SD

 

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