Thursday

March 5, 2015

March 5, 2015

Posted by **Lance** on Thursday, July 25, 2013 at 7:56pm.

What is the probability that a randomly selected wheel bearing will have an inside diameter of,

a) between 1.28 and 1.30 inches?

b) between 1.31 and 1.33 inches?

c) between what two values (in terms of inside diameter) will 60% of the wheel bearings fall?

If 16 random samples of 16 wheel bearings were selected,

d) what proportion of the sample means would be between 1.31 and 1.33 inches?

e) compare your results in B and D

- Statistics -
**PsyDAG**, Friday, July 26, 2013 at 2:05pm(A-C) Z = (score-mean)/SD

Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportions/probabilities related to the Z scores. Reverse the process with the 60% (.60).

(D) Here you are dealing with a distribution of means rather than raw scores.

Z = (score-mean)/SEm

SEm = SD/√n

Use same table.

- Statistics -
**pms**, Thursday, March 13, 2014 at 9:36pm.967

**Answer this Question**

**Related Questions**

statistics - The diameter of small Nerf balls manufactured at a factory in China...

statistics - A survey found that women's heights are normally distributed with ...

statistics - The diameter of an electric cable is normally distributed, with a ...

Statistics - The lifetime of a certain type of automobile tire (in thousands of ...

statistics - The diameter of an electric cable is normally distributed, with a ...

Statistics - The diameter of an electric cable is normally distributed, with a ...

statistics - The diameter of an electric cable is normally distributed, with a ...

algebra - Diameter of an electric cable is normally distributed with a mean f 0....

Statistics - The grades for Economics students at a large university are found ...

statistics - It is claimed that an automobile is driven on the average more than...