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January 26, 2015

January 26, 2015

Posted by **mariha** on Saturday, April 14, 2012 at 8:57am.

(a) Explain what Type I error and Type II error that may occur in this study.

(b) What is the probability of committing a type II error if its battery actual last for 14 days.

(c) What sample size you will need if it is intended for a 90% probability of detecting that ‘the u is less than 15’ when it was actually u=14.

- statistics -
**MathGuru**, Saturday, April 14, 2012 at 6:51pmHere are a few suggestions:

Type I errors result when you reject the null and it's true. Type II errors result when you accept the null and it's false. The probability of a Type II error is beta.

You may be able to find sample size using margin of error.

Formula is this:

Margin of error = (z-value)(sd/√n)

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