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Answer the questions below using the appropriate statistical technique. For questions involving the use of hypothesis...

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Basic Math

Answer the questions below using the appropriate statisticaltechnique. For questions involving the use of hypothesis testing,you must:

1. State the null and research hypotheses

2. Provide the Z(critical), T(critical), or ? 2 (critical) scorecorresponding to the ? threshold for your test

3. Provide your test statistic

4. Provide your decision about statistical significance

A random sample of 350 persons yields a sample mean of 105 and asample standard deviation of 10. Construct three differentconfidence intervals to estimate the population mean, using 95%,99%, and 99.9% levels of confidence. What happens to the intervalwidth as the confidence level increases? Why?

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