Suppose that your sample size was 37, what is P(t<-1.74) (Negative 1.74)?

The proportion of Americans who have frequent migraines is 15.2% according to the CDC. An acupuncturist claims that her treatment can reduce this figure significantly. A random sample of 136 Americans is administered the acupuncturists treatment and 14 report experiencing migraines.a. State Hypotheses to the scenario using the correct symbols.  b.What is the sample proportion? (Round to 2 decimal places) ˆpp^= c. Suppose the P-value is calculated to be 0.0144What would your decision be for this test using α=α= 0.10? Accept the null, fail to reject the null or reject the null d. Write a conclusion in terms of the acupuncturist's claim. Use the model provided by the instructor. Assume no errors were made.

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The proportion of Americans who have frequent migraines is 15.2% according to the CDC. An acupuncturist claims that her treatment can reduce this figure significantly. A random sample of 260 Americans is administered the acupuncturists treatment and 31 report experiencing migraines.a. State Hypotheses to the scenario using the correct symbols. b. What is the sample proportion? (Round to 2 decimal places) ˆpp^=c. Suppose the P-value is calculated to be 0.0427What would your decision be for this test using α=α= 0.05? fail to reject the null reject the null accept the null    Write a conclusion in terms of the acupuncturist's claim. Use the model provided by the instructor. Assume no errors were made.

Suppose that you are interested in the number of people in each household in the U.S. Your sample includes 10 households, with a mean 2.5 and a standard deviation 1.2. If you sampled 100 households, how would it compare from 99% Cl to 95% CI  (A) It should be wider than the 95% CI. (B) It should be of the same width as the 95% CI.  (C) It should be narrower than the 95% CI.  (D) We cannot tell, because the information is insufficient.

Suppose you are using a=0.01 to test the claim that μ ≤ 36 using a P-value. You are given the sample statistics n= 39_x = 37.9 and s= 4.2. Find the P-value.

A study is to be made to estimate the proportion of residents of a certain city and its suburbs who favor the construction of a nuclear power plant near the city. How large a sample is needed if one wishes to be at least 90​% confident that the estimate is within 0.06 of the true proportion of residents who favor the construction of the nuclear power​ plant?

Suppose 420 randomly selected people are surveyed to determine whether or not they subscribe to cable TV. Of the 420 surveyed, 250 reported subscribing to cable TV. What is the sample proportion for successes, p′? Round the final answer to three decimal places.

A study is to be made to estimate the proportion of residents of a certain city and its suburbs who favor the construction of a nuclear power plant near the city. How large a sample is needed if one wishes to be at least 95​%  confident that the estimate is within  0.08  of the true proportion of residents who favor the construction of the nuclear power​ plant?

For this problem, carry at least four digits after the decimal in your calculations. Answers may vary slightly due to rounding. How hard is it to reach a businessperson by phone? Let p be the proportion of calls to businesspeople for which the caller reaches the person being called on the first try. LAUSE SALT (a) If you have no preliminary estimate for p, how many business phone calls should you include in a random sample to be 80% sure that the point estimate p will be within distance of 0.07 from p? (Round your answer up to the nearest whole number.) phone calls (b) A report states that businesspeople can be reached by a single phone call approximately 23% of the time. Using this (national) estimate for p, answer part (a). (Round your answer up to the nearest whole number.) phone calls