For conducting a two-tailed hypothesis test with a certain data set, using the smaller of n...
You are conducting a two-tailed hypothesis test to see if your sample mean (x̄) differs significantly from your population mean (μ = 50). Your alpha level is 0.05 (α = 0.05). Sample data: 53, 56, 59, 64, 55, 42, 36, 58, 39, 53, 62, 60, 64, 53, 42, 53, 65, 60, 61, 63 You will need to: h) State your alternative hypothesis and null hypothesis i) Calculate the sample mean (x̄) j) Calculate the sample standard deviation (s) k) Calculate...
11. A one-tailed hypothesis test with the t statistic a Aa Antisocial personality disorder (ASPD) is characterized by deceitfulness, reckless disregard for the well-being of others, a diminished capacity for remorse, superficial charm, thrill seeking, and poor behavioral control. ASPD is not normally diagnosed in children or adolescents, but antisocial tendencies can sometimes be recognized in childhood or early adolescence. James Blair and his colleagues have studied the ability of children with antisocial tendencies to recognize facial expressions that depict...
You have a sample size of N = 20. You will perform a one-tailed t-test with alpha = .05. You have looked up the critical value and it is -1.73. You have calculated t-test statistics of -1.41. Which of the following is correct? Reject the null or retain the null? You have a sample size of N = 37 and you are going to perform a one-sample t-test using alpha = .05. You go to the t-table and find that...
Use the following data and conduct a two-tailed hypothesis test using = .05. a. What are EX, CY, (CX)(CI)? b. What is EXY? c. What are your hypotheses? d. What are your degrees of freedom? e. What is the critical value? f. What is the value of Pearson /? g. What do you conclude? Participant Reading Speed Test Score Number of Books Read (Y) (X) 16 F
You are conducting a multinomial hypothesis test (α = 0.05) for the claim that all 5 categories are equally likely to be selected. Complete the table. Category Observed Frequency Expected Frequency A 10 B 5 C 21 D 14 E 8 What is the chi-square test-statistic for this data? χ2= What are the degrees of freedom for this test? d.f.= What is the p-value for this sample? (Report answer accurate to four decimal places.) p-value = Is the P-Value... A....
Use the following data and conduct a two-tailed hypothesis test using a = .05. a. What are EX, EY, (EX)(EY)? b. What is 2.XY? c. What are your hypotheses? d. What are your degrees of freedom? e. What is the critical value? f. What is the value of Pearson r? g. What do you conclude? Reading Speed Test Score Number of Books Read Participant TO 12 9119 a $ 4 10
You are conducting a multinomial hypothesis test (αα = 0.05) for the claim that all 5 categories are equally likely to be selected. Category Observed Frequency A 20 B 15 C 15 D 12 E 18 What is the chi-square test-statistic for this data? χ2=χ2= What are the degrees of freedom for this test? d.f. = What is the p-value for this sample? (Report answer accurate to four decimal places.) p-value = The p-value is... less than (or equal to)...
5. A step-by-step hypothesis test for a repeated-measures design Aa Aa E Consider the following data from a repeated-measures design. You want to use a repeated-measures t test to test the null hypothesis Ho: Wp = 0 (the null hypothesis states that the mean difference for the general population is zero). The data consist of five observations, each with two measurements, A and B, taken before and after a treatment. Assume the population of the differences in these measurements are...
1) Identify the rejection point(s) for the test of the following hypothesis: H0: mean = 10, Ha: mean != 10 Conducted on a sample size of 15, on a normally distributed population with unknown population variance, and a desired Type1 error probability (alpha) of 0.05. Hint: use the appropriate statistical function in your spreadsheet to determine the rejection point. Z test with rejection points -1.64 and +1.64 Z test with rejection points -1.96 and +1.96 t-test with degrees of freedom=14,...
6. The t test for two independent samples - One-tailed example using tables Aa Aa Most engaged couples expect or at least hope that they will have high levels of marital satisfaction. However, because 54% of first marriages end in divorce, social scientists have begun investigating influences on marital satisfaction. [Data source: This data was obtained from National Center for Health Statistics.] Suppose a counseling psychologist sets out to look at the role of economic hardship in relationship longevity. He...