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Unit 2 test

Authored by Ildefonso Salva

Mathematics, Other

9th - 12th Grade

Used 3+ times

Unit 2 test
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20 questions

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1.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

(2 points) Jorge’s score on Exam 1 in his statistics class was at the 64th percentile of the scores for all students. His score falls

between the minimum and the first quartile.

between the first quartile and the median.

between the median and the third quartile.

between the third quartile and the maximum.

at the mean score for all students.

2.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

(2 points) Scores on the ACT college entrance exam follow a bell-shaped distribution with mean 18 and standard deviation 6. Wayne’s standardized score on the ACT was −0.7. What was Wayne’s actual ACT score?

4.2

-4.2

13.8

17.3

22.2

3.

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

(4 points) George has an average bowling score of 180 and bowls in a league where the average for all bowlers is 150 and the standard deviation is 20. Bill has an average bowling score of 190 and bowls in a league where the average is 160 and the standard deviation is 15. Who ranks higher in his own league, George or Bill?

Bill, because his 190 is higher than George’s 180.

Bill, because his standardized score is higher than George’s.

Bill and George have the same rank in their leagues, because both are 30 pins above the mean.

George, because his standardized score is higher than Bill’s.

George, because the standard deviation of bowling scores is higher in his league.

4.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

(2 points) If every observation in a data set is multiplied by 10, the only one of the following that is not multiplied by 10 is

the mean.

the median.

the IQR.

the standard deviation.

the variance.

5.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

(2 points) If 30 is added to every observation in a data set, the only one of the following that is not changed is

the mean.

the 75th percentile.

the median.

the standard deviation.

the minimum.

6.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

(2 points) Which of the following is least likely to have a nearly Normal distribution?

Heights of all female students taking STAT 001 at State Tech.

IQ scores of all students taking STAT 001 at State Tech.

SAT Math scores of all students taking STAT 001 at State Tech.

Family incomes of all students taking STAT 001 at State Tech.

All of (a)–(d) will be approximately Normal.

7.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Media Image

The weights of laboratory cockroaches follow a Normal distribution with mean 80 grams and standard deviation 2 grams. The figure below is the Normal curve for this distribution of weights.


Point C on this Normal curve corresponds to

84 grams.

82 grams.

78 grams.

76 grams.

74 grams.

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