
Unit 6 Math 4 Exam Review Probability Distributions
Mathematics
11th Grade
Used 6+ times

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12 questions
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1.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
The 40 yards sprint times for a soccer team are found to be normally distributed with a mean of 5.2 seconds and a standard deviation of 0.3 seconds. What is the z-score for a player who runs a time of 5.6 seconds?
2.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
The mean GPA of students in a course at UCDavis is 3.2 with a standard deviation of 0.3. What percent of students in the course have a GPA between 2.9 and 3.8?
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
The z-score represents.....
4.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
The mean number of accidents a week at a company is 6.4 with a standard deviation of 1.5. What proportion of weeks would you expect to have more than 7 accidents?
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A game consists of rolling a colored die with three blue sides, two red sides, and one white side. A roll of blue loses. A roll of red pays $3.00. A roll of white pays $5.00. The charge to play the game is $2.00. Would you play the game? Why or why not?
E(x)= -$.17
Students should play the game because the expected value is negative
E(x)= $.32
Students should play the game because the expected value is positive
E(x)= $.32
Students should not play the game because the expected value is positive
E(x)= -$.17
Students should not play the game because the expected value is negative.
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
On Test A Marsha scored a 98. The mean of test A was 92 with a standard deviation of 8. If the mean of test B is 250 with a standard deviation of 26, what score must Marsha earn to do equivalently well on both tests?
269.5
230.5
226
276
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A time of 98 is three standard deviations above the mean and a time of 42 is one standard deviation below the mean. What is the mean of the distribution?
14
56
70
84
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