When the data produces a t statistic that is greater than the critical t value in a directional test; you would reject the null hypothesis : A) Sometimes B.) Always C.) Never
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When the data produces a t statistic that is greater than the critical t value in a directional test; you would reject the null hypothesis :
A) Sometimes
B.) Always
C.) Never
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- Let ? denote the true average reaction time to a certain stimulus. For a z test of H0: ? = 5 versus Ha: ? > 5, determine the P-value for each of the following values of the z test statistic. (Round your answers to four decimal places.) a.) 1.41 b.) 0.97c.) 1.96d.) 2.43e.) -0.15Express the null hypothesis and the alternative hypothesis in symbolic form. Use the correct symbol (μ, p, σ) for the indicated parameter. The manufacturer of a refrigerator system for beer kegs produces refrigerators that are supposed to maintain a true mean temperature, μ, of 48°F, ideal for a certain type of German pilsner. The owner of the brewery does not agree with the refrigerator manufacturer and claims he can prove that the true mean temperature is incorrect. A. H0: μ≤48°F H1: μ>48°F B. H0: μ=48°F H1: μ≠48°F C. H0: μ≠48°F H1: μ=48°F D. H0: μ≥48°F H1: μ<48°FExpress the null hypothesis and the alternative hypothesis in symbolic form. Use the correct symbol (μ, p, σ) for the indicated parameter. The manufacturer of a refrigerator system for beer kegs produces refrigerators that are supposed to maintain a true mean temperature, μ, of 48° F, ideal for a certain type of German pilsner. The owner of the brewery does not agree with the refrigerator manufacturer, and claims he can prove that the true mean temperature is incorrect. Group of answer choices H0 : μ ≤ 48°H1 : μ > 48° H0 : μ ≥ 48°H1 : μ < 48° H0 : μ ≠ 48°H1 : μ = 48° H0 : μ = 48°H1 : μ ≠ 48°
- A fair die is rolled. Lee Y be the face number showing. Define X by the rule rX =Y if Y is even. |x=0 if is odd. D Find the best predictar and the bert linear predictor of Y based on X. ® Compree the mean sguared eror of prediction for each predictor.Participants threw darts at a target. In one condition, they used their preferredhand; in the other condition, they used their other hand. All subjects performed inboth conditions (the order of conditions was counterbalanced). Their scores areshown below.Preferred Non-preferred12 77 911 813 1010 9a. Which kind of t-test should be used?b. Calculate the two-tailed t and p values using this t test.c. Calculate the one-tailed t and p values using this t test.Express the alternative hypothesis in symbolic form. An automobile technician claims that the mean amount of time (in hours) per domestic car repair is more than that of foreign cars. Assume that two samples are independent. Let the domestic car repair times be the first population and the foreign car repair times be the second population. O A. H H1 = H2 O B. H 1 42. O C. H H1 #P2 O D. H: P1A researcher wants to know whether athletic women are more flexible than non-athletic women. For this experiment, a woman who exercised vigorously at least four times per week was considered "athletic". Flexibility is measured in inches on a sit & reach box. A researcher tested his claim using the following summary statistics: Athletic women n = 50 5.0 inches s=1.4 inches Non-athletic women n = 30 x=4.6 inches s=0.8 inches Assume that all conditions for testing have been met t = 1.626; p = 0.057, At the 1% significance level, state your decision regarding the null hypothesis and your conclusion about the original claim OA. Fail to reject the null hypothesis, there is not strong enough evidence to suggest that athletic women are more flexible, on average, than non-athletic women OB. Fail to reject the null hypothesis, there is strong evidence to suggest that non-athletic women are more flexible, on average, than athletic women. OC. Reject the null hypothesis; there is strong evidence to…(CLO 2) Test a claim that the mean height of people you know is not equal to 64 inches using the p-value method or the traditional method by completing the following: State H0 and H1. Find the p value or critical value(s). Draw a conclusion in context of the situation. Person Person 1 Person 2 Person 3 Person 4 Person 5 Person 6 Person 7 Person 8 Person 9 Height (Inches) 71 68 72 60 64 67 73 63 70 Weight 190 220 240 203 190 193 200 185 180In each graph, the shaded region represents the P-value of a hypothesis test. Find the P-value, given that the Standardized Test Statistic is T = - 1.9. Round to 4 decimals a. -4 -3 -2 -1 4 T (df.= 19) b. -2 -1 2. T (df. = 19) c. -1 1 4 T (df. = 19) Submit Question MacBook AirQ.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?Indicate for each which type of t test is appropriate (independent, dependent). An educator would like to assess the effectiveness of a new instructional program for reading. The control group consist of n= 4 second grade students who are provided with the traditional instruction used at school. Later these students are given the experimental instruction and measured again on reading.What percent of z-scores are greater than z = 0.36? Group of answer choices A.) 35.94% B.) 47.19% C.) 55.82% D.) 64.06% E.) 73.95%SEE MORE QUESTIONS