STATISTICS HYPOTHESIS HOMEWORK?

Posted on 2014-04-11 06:14:00 in Statistics by SHIRLEY

for each hypothesis test please provide the following info.

a) state the null and the alternate hypothesis

b) identify the sampling distribution to be used: the standard normal distribution or the student t's distribution, find the critical values

c) compute the z or t value of the sample test statistic

d) find the P value or an interval containing the P value for the sample test statistic

f) based on your answers to parts (a) through (d) decided whether to reject or not to reject the null hypothesis at the given significance level, explain you conclusion in simple non-technical terms



25.) dental associations recommend that the time lapse between routine dental check-ups should average six months. a random sample of 36 patient records at one dental clinic showed the average time between routine check-ups to be 7.2 months with standard deviation 2 months. do the sample data indicate that patients wait longer than recommended between dental checkups? in your test, calculate the P value for the sample test statistic and determine if the data is statistically significant, use a 1% signif. level



26.) a study showed that in CA the avg. single family home owner lived at one address 8.0 yrs before moving. in sonoma county, a random sample of 116 single family home owners lived at one address an avg. of 8.7 yrs w/ a std. dev. 2.8 yrs. test the claim that single family home owners in sonoma live in one place longer than the state avg. calculate P, use 1% signif. level

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