Suppose that one of your classmates wrote down the following hypotheses for this

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Suppose that one of your classmates wrote down the following hypotheses for this example from Question 1. What is wrong with these hypotheses? Ho: x^- = $815 Ha: x^- > $815 5. If a researcher obtained a p value of 0.08 for a hypothesis test that has a significance level (or al level) of 0.05, what conclusion should the researcher make? a. The null hypothesis is true. b. The null hypothesis should not be rejected. c. The null hypothesis should be rejected. d. None of the above. If a researcher obtained a p-value of 0.08 for a one-sided (or one-tailed) alternative hypothesis, what would the p-value if the alternative hypothesis two-sided (or two- tailed)? Assume here that all that would change would the direction of the alternative hypothesis, the sample data would be the same, a. 0.08 b. 0.04 c. 0.16 d. 0.28 e. It's impossible to answer this question with the given information A hypothesis test is conducted in which the alternative hypothesis is that more than 10% of a population is left-handed. The p-value for the test is calculated to be 0.25. Which statement is correct? a. We can conclude that more than 10% of the population is left-handed. b. We can conclude that more than 25% of the population is left-handed. c. We can conclude that exactly 25% of the population is left-handed. d. We cannot conclude that more than 10% of the population is left-handed. A test for ESP involves having someone repeatedly try to guess which one of four photographs is the chosen "target, " with a different set of photographs used for each trial. Define p to be the probability of a correct guess. Suppose someone guesses 100 times, and gets 30 correct, so p^= 0.30. What is the appropriate null hypothesis in this situation? a. H_0: p =.25 b. H_0: p =.30 c. H_0: p^=.25 d. Ho: p^=.30 In a newspaper article about whether the regular use of Vitamin C reduces the risk of getting a cold, a researcher is quoted as saying that Vitamin C performed better than placebo in an experiment, but the difference was not larger than what could be explained by chance. In statistical terms, the researcher is saying the results are a. due to non-sampling errors. b. definitely due to chance. c. statistically significant. d not statistically significant.

Explanation / Answer

5) option b is correct

6)option C is correct

7)option d is correct

8)option a is correct

9)option d is correct

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