1. Using the following stem & leaf plot, find the five number summary for the data by hand. 1|3 3 2|0 1 4 3|0 1 4|0 3 5 9 5|2 4 7 8 9 6|0 1 Min = _________ Q1 = _____ Med = _______ Q3 = ___ Max = ____

2. Find the 34th percentile, P₃₄,from the following data

11.6	13.6	23.2	25	25.5
28.4	29.5	31.1	33.5	35.8
36.7	37.8	38.7	39.3	39.8
40.4	41.2	45	45.2	45.7
46.5

P₃₄=

3.Consider the boxplot below. 10203040506070data1324415770[Graphs generated by this script: setBorder(15); initPicture(10,70,-3,6);axes(10,100,1,null,null,1,'off');text([38.5,-3],"data");line([13,2],[13,4]); rect([24,2],[57,4]); line([41,2],[41,4]);line([70,2],[70,4]); line([13,3],[24,3]); line([57,3],[70,3]);fontsize*=.8;fontfill='blue';text([13,4],'13','above');text([24,4],'24','above');text([41,4],'41','above');text([57,4],'57','above');text([70,4],'70','above');fontfill='black';fontsize*=1.25;]

1. What quarter has the smallest spread of data?
   • Third Quarter
   • First Quarter
   • Second Quarter
   • Fourth Quarter
2. What is that spread?
3. Find the Inter Quartile Range (IQR):
4. Which interval has the most data in it?
   • 42 - 57
   • 24 - 41
   • 13 - 24
   • 55 - 70
5. What value could represent the 82nd percentile?
   • 61
   • 14
   • 31
   • 48

4.

Here is a set of sample data.

12	30	29	1	78	50	16	90	98	34
79	93	85	41	32	7	40	5	84	65
56	99	21	26	17

Base on the data above, identify the 5 number summary , __________, ________,__________ ,__________,__________

5.

We are going to calculate the standard deviation for the following set of sample data.

10

4

5

1

7

1) Calculate the mean. x=x= 2) Fill in the table below: Fill in the differences of each data value from the mean, then the squared differences.

xx	xxx-x	(xx)2(x-x)2
10
4
5
1
7
	(xx)2=(x-x)2=

3) Calculate the sample standard deviation (ss). s=(xx)2n1=s=(x-x)2n-1=(Please round your answer to two decimal places)

Note:nnis the sample size or the number of data value in the sample.

6.

This data is from asample. Calculate the mean, standard deviation, and coefficient of variation.

28.3

49.5

20.1

18.6

15.4

18.3

11.3

Please show the following answers to 2 decimal places. Mean = Standard Deviation = Coefficient of Variation =% (Please enter a whole number.)

7.Adult men have heights with a mean of 69.0 inches and a standard deviation of 2.8 inches. Find the height of a man with a z-score of -0.1786 (to 4 decimal places)

____

8.

To compute a student's Grade Point Average (GPA) for a term, the student's grades for each course are weighted by the number of credits for the course. Suppose a student had these grades: 3.6 in a 5 credit Math course 2.0 in a 2 credit Music course 3.1 in a 4 credit Chemistry course 2.8 in a 5 credit Journalism course What is the student's GPA for that term? Round to two decimal places. Student's GPA = ___

9.In a city with three high schools, all the ninth graders took a Standardized Test, with these results:

High School	Mean Test Score	Number of ninth graders (Frequency)
Glenwood	78	256
Central	91	331
Lincoln	71	176

The city's PR manager, who never took statistics, claimed the mean score of all ninth graders in the city was the average of 78, 91, and 71, which is 80. Of course, that is incorrect. What is the mean score for all ninth graders in the city? Round to one decimal place. Mean of all ninth grader's scores =

Hint:Textbook Measures of Center

10.

We are going to calculate the mean, median, and mode for two sets of data.Please show your answer to one decimal place if necessary. Here is the first data set.

97

83

46

88

44

24

69

51

51

67

50

1. what is the mean (xx) of this data set?
2. What is the median of this data set?
3. What is the mode of this data set?
4. Here is the second data set.

100

58

48

84

41

92

29

96

52

100

1. What is the mean (xx) of this data set?
2. What is the median of this data set?
3. What is the mode of this data set?

PLEASE HElp me..thanks ..im studying ..thank you so much =)