Statistics Week 5
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Use the given statement to represent a claim. Write its complement and state which is Upper H 0 and which is Ha. u<431
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Find the complement of the claim. A. Pick the opposite of the "greater that or less than sign"of the...


You are given the sample mean and the population standard deviation. Use this information to construct the 90% and 95% confidence intervals for the population mean. Interpret the results and compare the widths of the confidence intervals. If convenient, use technology to construct the confidence intervals. A random sample of 60 home theater systems has a mean price of $140. Assume the population standard deviation is $15.40 Construct a 90% confidence interval for the population mean. The 90% confidence interval is (nothing,nothing).
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Determine whether the claim stated below represents the null hypothesis or the alternative hypothesis. If a hypothesis test is performed, how should you interpret a decision that (a) rejects the null hypothesis or (b) fails to reject the null hypothesis? A scientist claims that the mean incubation period for the eggs of a species of bird is less than 57 days.
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see excel spreadsheet. This your answer

Determine whether to reject or fail to reject Upper H 0 at the level of significance of a) alpha equals 0.02 and b) alpha equals0.09.
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Upper H H0: mu μ equals=109 Upper H Subscript aHa: mu μ not equals≠109 and P =0.02080.0208. see excel spreadsheet. This your answer

Find the minimum sample size n needed to estimate p for the given values of c, a, and E.
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c = 0.90. a = 9.9. and E = 2 Answer = 67

In a survey of 641 males ages 1864, 394 say they have gone to the dentist in the past year. Construct 90% and 95% confidence intervals for the population proportion. Interpret the results and compare the widths of the confidence intervals. If convenient, use technology to construct the confidence intervals. The 90% confidence interval for the population proportion p is The 95% confidence interval for the population proportion p is Interpret your results of both confidence intervals. Which interval is wider?
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In a random sample of 25 people, the mean commute time to work was 30.4 minutes and the standard deviation was 7.3 minutes. Assume the population is normally distributed and use a tdistribution to construct a 99 confidence interval for the population mean muμ. What is the margin of error of muμ? Interpret the results.
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