Project #22272 - Sats 300

A. For the given data that represent the test scores for the first stat test, 

 

100 94 81 81 78 91 69 94 72 72 88 38 94 81 81 91 

 

1) Find Mean, (Round in 2 decimal) 1) _________ 

 

A) 85.65 B) 84.24 C) 69.54 D) 81.56 

 

2) Find Standard Deviation, (Round in 2 decimal) 2) _________ 

 

A) 15.23 B) 14.78 C) 12.56 D) 21.35 

 

 

3) Find the upper bound for 95 % empirical rule, (Round in 2 decimal) 3) _________ 

 

 

A) 115.23 B) 111.12 C) 112.95 D) 101.58 

 

4) For the given set of data find the Q1 4) __________ 

 

A) 65.5 B) 65 C) 75.5 D) 75 

 

5) For the given set of data find the Q3 5) _________ 

 

A) 90.5 B) 88.5 C) 82.5 D) 92.5 

 

 

6) In a super market on a given day the longest and shortest waiting time were measured as 310, and 50 seconds. 6) _________ 

 By using the given information can we estimate standard deviation. If yes what will be the answer? 

 

A) 55 seconds B) 65 seconds C) Can not be determined D) None of the above 

 

B. Given the final scores for two of Abe’s stat classes; Use the below frequency table, and then answer the questions. 

 

Final Scores f m f ×m 2 f ×m 

50- 60 

60 - 70 

70 - 80 

80 - 90 

90 – 100 

12 

10 

 

65 

 

 

520 

 

 

 

 

 

54150 

 

 

7) Find Mean, (Round in 2 decimal) 7) _________ 

A) 76.5 B) 8 C) 8.5 D) 67.5 

 

8) Find Standard Deviation, (Round in 2 decimal) 8) _________ 

 

A) 13.68 B) 11.53 C) 12.1 D) 21.35 

 

9) Find the upper bound for 68 % empirical rule, (Round in 2 decimal) 9) _________ 

 

A) 86.8 B) 88.6 C) 78.23 D) 84.4 

 

10) Find the lower bound for 95 % empirical rule, (Round in 2 decimal) 10) ________ 

 

A) 52.3 B) 48.39 C) 53.62 D) 49.21 

 

Provide an appropriate response.

11) Which measure of central tendency is notresistant to extreme values in a numeric data set?

A) Mean B) Parameters C) Mode D) Median

11)

12)

For the distribution drawn here, identify the mean, median, and mode.

A) A = median, B = mode, C = mean B) A = mode, B = median, C = mean

C) A = mode, B = mean, C = median D) A = mean, B = mode, C = median

12)

13) The annual profits of five large corporations in a certain area are given below. Which measure of

central tendency should be used?

$135,000  $143,000  $163,000  $133,000  $1,213,000

A) midrange B) median C) mode D) mean

13)

14) In interpreting a boxplot of a data set we note that the median is to the left of the center of the box

and the right line is longer than the left line.  We can conclude that

A) The data is symmetric.

B) The data is skewed left.

C) Skewness or symmetry cannot be determined by a box plot.

D) The data is skewed right.

14)

Find the mean of the data summarized in the given frequency distribution.

15) The highway speeds of 100 cars are summarized in the frequency distribution below. Find the

mean speed.

Speed (mph)  Cars

30-39 5

40-49 18

50-59 50

60-69 17

70-79 10

A) 60.9 mph B) 58.2 mph C) 55.4 mph D) 54.5 mph

Subject Mathematics
Due By (Pacific Time) 02/06/2014 12:00 pm
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