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