You are running a single sample t-test and have an N of 65. What do you know? a. df = 66 b. This would be a non-directional hypothesis. C. df = 64 d. This would be a directional hypothesis.

Do a hypothesis for the following, make sure to include and label all five steps:             Test the claim that tutoring influences a student’s test scores. Use a 0.01 level of significance. Use the following before and after scores for 5 students.   Before 78 79 65 78 68 After 85 83 62 85 79

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We conduct a test of hypothesis of Ho : p = 0.3 vs. HA : p > 0.3. The value of the test statistic is -2.00. Which picture represents the appropriate p-value? A -2 C Select one: a. A b. B С. C d. D O O O O

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Q.1 Dr. Star is interested in whether the physical coordination skills among low-income pre-school children are different from those of other children. She knows the population mean for the Pre- School Coordination Activity Test (PCAT) is 120 with o x= 10. She tests 80 preschoolers from low-income families and obtains an X= 122. a. Should Dr. Star do a one-tailed or a two-tailed test? Explain your answer. b. State the appropriate H o and H a , given your answer in part a. c. Use at a = 0.05. What is the value of zcrit ? d. Calculate z obt e. Using symbols, report your findings. f. What should Dr. Star conclude?

Scenario: 200 people were asked, “Who is your favorite superhero?” Below are the data.  Test the null hypothesis that the population frequencies for each category are equal.  α= .05. Iron Man Black Panther Wonder Woman Spiderman fo = 40 fo = 60 fo =55 fo = 45 fe = fe = fe = fe =   What is the correct result based on the data?

From this geometruc distrubtion. (0.45)8(0.55). What does the 8 represent?  1. Probability of failure 2. Probability of success  3. The number of failurees 4. Number of sucesses

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Need help with parts C & D 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 191 Americans is administered the acupuncturists treatment and 25 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 0.0318What would your decision be for this test using α=α= 0.025? fail to reject the null accept the null 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.