question 1:the following table gives the frequency distribution of the number of errors committed by a college baseball team in all of the44

games that it played during the 2011-12 season.

Number of Errors Number of Games

0 11

1 13

2 9

3 7

4 3

5 1

Find the mean, variance, and standard deviation. (Hint: The classes in this example are single valued. These values of classes will be used as values ofm

in the formulas for the mean, variance, and standard deviation.)

Round your answers to two decimal places.

Mean =

Variance =

Standard deviation=

Question 2:The following table gives the frequency distribution of the amounts of telephone bills for August 2012 for a sample of50

families.

Amount of Telephone Bill (dollars) Number of Families

40to less than70 2

70to less than100 15

100 to less than130 15

130 to less than160 5

160 to less than190 13

Calculate the mean, variance, and standard deviation.

Round your answers to two decimal places.

Mean =$

Variance =

Standard deviation =$

Question 3:

The following data give the prices of seven textbooks randomly selected from a university bookstore.

$86 $171 $102 $118 $51 $165 $147

a.Find the mean for these data. Calculate the deviations of the data values from the mean. Is the sum of these deviations zero?

Mean = $

Deviation from the mean for $171= $

Enter you answer; Deviation from the mean

Sum of these deviations = $

Enter you answer; Sum of these deviations

b.Calculate the range, variance, and standard deviation. [Round your answers to 2 decimal places.]

Range = $

Variance =

Standard deviation = $

Question 4:Grand Jury indictment data for Gloucester Country, New Jersey, are published every week in theGloucester Country Timesnewspaper The following data are the number of indictments for a sample of11

weeks selected from July 2010 through June 2011:

35 13 17 21 21 29 20 26 24 13 23

Find the mean, median, and mode for these data.

Enter the exact answers. Enter the modes in increasing order. If there is only one mode, enter it first and enter "NA" in the second answer region.

Mean=

Median=

Mode=

Question 6:The following data give the weights (in pounds) lost by15

members of a health club at the end of2

months after joining the club.

3 22 11 19 12 3 11 13

12 16 8 3 8 16 14

a.Compute the values of the three quadrilles and the quarterfinal range.

Q 1=

Q 2=

Q 3=

I Q R=

b.Calculate the approximate value of the82nd

percentile.

Enter an exact value.

Enter you answer in accordance to the item b) of the question statement

c.Find the percentile rank of12

.

Round your answer to the nearest integer.

QUESTION 7:The following data give the numbers of computer keyboards assembled at the Twentieth Century Electronics Company for a sample of25

days.

33 31 30 30 29 29 24 25 25 25

26 27 29 28 28 27 18 19 20 21

21 22 23 23 24

Determine the (approximate) value of the53

rd percentile.

Round your answer to the nearest integer.

The approximate value of the53

rdpercentile is

QUESTION 8:The following data give the numbers of computer keyboards assembled at the Twentieth Century Electronics Company for a sample of25

days.

44 45 41 39 40 45 43 44 50 50

52 51 54 51 48 49 49 50 42 42

46 46 46 47 48

Find the percentile rank of46

.

The percentile rank of46

is