Thursday

March 26, 2015

March 26, 2015

Posted by **Allan** on Sunday, March 14, 2010 at 9:31am.

A person tests each delivery by taking 5 samples, accepting the goods only if the mean is at most 8.01

a)

Find the probability of type 1 error?

b)

A hypothesis test is to be carried out with P(type I error) = P(type II error) and either one being at 0.1%.

What is the necessary sample size for this test? (answer in my book says it's n=17)

2)

A company will sell a new product if the proportion of customers that will buy it is at least 20%. It is decided that the null hypothesis is rejected if the sample proportion is at least 27%. Sample size = 100.

a) Find P(type I error)

b)

If P(do not reject the null hypothesis)must be at least 99% if the true proportion is 0.17 and

P(reject the null hypothesis)must be at least 99% if the true proportion is 0.27:

which sample size is required?

(My book's answer is n = or greater than 365)

I don't understand how to solve these kind of questions, I'd greatly appreciate if you could help explain !

- probability and statistics) -
**drwls**, Sunday, March 14, 2010 at 10:23amHelp wanted in this subject

**Answer this Question**

**Related Questions**

Statistics - This is the first question..... For a population that has a ...

MATH - Which of the following normal distributions has the smallest spread? A. A...

Math - LongLast Inc. produces car batteries. The mean life of these batteries ...

Statistics - Is it from Normal Distribution - I think I know how to answer the ...

statistics - An SRS of size n is taken from a large population whose ...

statistics - The scores of students on the ACT college entrance examination in ...

stats - Suppose the mass of college students can be modeled by the normal ...

Statistics - 1. The scores of students on the ACT college entrance examination ...

Statistics - The standard deviation of GPAs (grade point averages) of all male ...

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