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April 19, 2015

Homework Help: check math problem

Posted by tommy512 on Friday, June 7, 2013 at 8:37pm.

(c) The number of cars found to have unsafe tires among the 379 cars stopped at a roadblock for inspection (assume that 15% of all cars have one or more unsafe tires).
(i) Find the mean. (Give your answer correct to one decimal place.)
56.85.

(ii) Find the standard deviation. (Give your answer correct to two decimal places.) 6.79
.

(d) The number of melon seeds that germinate when a package of 60 seeds is planted (the package states that the probability of germination is 0.89.
(i) Find the mean. (Give your answer correct to one decimal place.)
Correct: 53.40.

(ii) Find the standard deviation. (Give your answer correct to two decimal places.)
3.10

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