Water Consumption The Old Farmer's Almanac stated that the average consumption of water per person per day was 123 gallons. To test the hypothesis that this figure may no longer be true, a researcher randomly selected 17people and found that they used on average 118.4 gallons per day and s = 5.3. At α = 0.05, is there enough evidence to say that the Old Farmer's Almanac figure might no longer be correct? Use the P-value method. Assume the population is normally distributed. Use a TI-83 Plus/TI-84 Plus calculator. (a) State the hypotheses and identify the claim. (b) Find the P-value. Round the answer to at least four decimal places. (c) Make the decision. (d) Summarize the results.

A researcher found that the two groups (n=25 in each group) they tested were significantly different from each other with a t-value of 2.91, which has a corresponding p-value of p=.06. Report the findings in APA number format.

Using the traditional formula, a 95% CI for P₁ - P₂ is to be constructed based on equal sample sizes from the two populations. For what value n (= m) will the resulting interval have width at most 0.2 irrespective of the results of the sampling? (Round your answer up to the nearest whole number.) n = You may need to use the appropriate table in the Appendix of Tables to answer this question.

I need help with question 2

You want to obtain a sample to estimate a population proportion. Based on previous evidence, you believe the population proportion is approximately p = 0.8. You would like to be 97% confident that your esimate is within 2% of the true population proportion. How large of a sample size is required?

For this problem, carry at least four digits after the decimal in your calculations. Answers may vary slightly due to rounding.A random sample of 5280 permanent dwellings on an entire reservation showed that 1620 were traditional hogans.

A researcher wants to see if there is a difference in APGAR scores of newborns depending on whether the mother smoked during pregnancy or not. She collects data and analyzes the results using SPSS. What is the correct way to report the results in APA style?   Question 23 options:   t(58) = 3.288, p>.05   t(58) = 3.288, p= .002   t(26.5) = 3.278, p<.05   t(26.5) =3.278, p=.003

In a survey of 1150 adult males, 805 said they use the Internet. In a survey of 1050females, 746 said they use the Internet. Atα= 0.05, can you reject the claim that the proportion of Internet users are the same for both groups?

What percentage of your campus student body is female? Let p be the proportion of women students on your campus.

In a study of exhaust emissions from school buses, the pollution intake by passengers was determined for a sample of nine school buses used in the Southern California Air Basin. The pollution intake is the amount of exhaust emissions, in grams per person, that would be inhaled while traveling on the bus during its usual 18-mile trip on congested freeways from South Central LA to a magnet school in West LA. Here are the amounts for the nine buses when driven with the windows open. 1.17     0.33    0.40     0.33     1.32     0.38     0.25     0.40     0.35   (a) Consider making a stemplot. Are there outliers or strong skewness that would preclude use of the t procedures? Which is correct? A. The sample is small and the stemplot is right skewed with possible outliers, so use of t procedures is not appropriate. b. The distribution is symmetric so use of t procedures is appropriate.    c. The sample is small and the stemplot is left skewed with possible outliers, so use of t procedures is…