MAT120 Module 3 Review (part 2)
Authored by Jeni Lambert
Mathematics
University
CCSS covered
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10 questions
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1.
FILL IN THE BLANK QUESTION
2 mins • 1 pt
A distribution of values is normal with a mean of 168.5 and a standard deviation of 32.7. Find P93, which is the score separating the bottom 93% from the top 7%.
Round your answer to one decimal place.
Tags
CCSS.HSS.ID.A.4
2.
FILL IN THE BLANK QUESTION
1 min • 1 pt
P( z > -0.78) =
Round to three decimal places.
Tags
CCSS.HSS.ID.A.4
3.
FILL IN THE BLANK QUESTION
2 mins • 1 pt
A manufacturer knows that their items have a normally distributed lifespan, with a mean of 2.1 years, and a standard deviation of 0.6 years. If you randomly purchase one item, what is the probability it will last longer than 3 years?
Round your answer to four decimal places.
Tags
CCSS.HSS.ID.A.4
4.
FILL IN THE BLANK QUESTION
1 min • 1 pt
Assume that a procedure yields a binomial distribution with n = 51 trials and the probability of success for one trial is p = 0.22. Find the mean for this binomial distribution.
Round your answer to one decimal place.
5.
FILL IN THE BLANK QUESTION
1 min • 1 pt
Assume that a procedure yields a binomial distribution with n = 51 trials and the probability of success for one trial is p = 0.22. Find the standard deviation for this distribution.
Round your answer to two decimals.
6.
FILL IN THE BLANK QUESTION
1 min • 1 pt
Assume that a procedure yields a binomial distribution with n = 51 trials and the probability of success for one trial is p = 0.22. Find the variance for this distribution.
Round your answer to two decimals.
7.
FILL IN THE BLANK QUESTION
2 mins • 1 pt
Weights are normally distributed with a mean of 344 grams and a standard deviation of 8 grams. The heaviest 4% weigh more than how many grams?
Round your answer to the nearest gram.
Tags
CCSS.HSS.ID.A.4
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