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A researcher hypothesizes that individuals who listen to classical music will score differently from the general population on a test of spatial ability. On a standardized test of spatial ability, µ =58.A random sample of 14 individuals who listen to classical music is given the same test. Their scores on the test are 52, 59, 63, 65, 58, 55, 62, 63, 53, 59, 61, 60, and 59. a) Is this a one-or two - tailed test? b) What are H0 and Ha for this study? c) Compute t obt. d) What is t cv? e) Should H0 be rejected? What should the researcher conclude? f) Determine the 95% confidence interval for the population mean, based on the sample mean. Question 8: A researcher believes that the percentage of people who exercise in California is greater than the national exercise rate. The national rate is 20%. The researcher gathers a random sample of 120 individuals who live in the California and finds that the number who exercise regularly is 31 out of 120. a. What is X2obt? b. What is df for this test? c. What is X2cv? d. What conclusion should be drawn from these results?
To increase membership. Determine the probability of all three selected are CPAs? Illustrate the proper way to compute probabilty?
What is the probability that a single randomly selected juror from Hidalgo County is Mexican-American? Explain briefly. What is the probability a single randomly selected juror is not Mexican-American? Explain briefly.
Graph a relative frequency histogram for the 500 measurements summarized in the accompanying relative frequency table.
Explain the difference between a left-tailed, two-tailed, and right-tailed test. When would we choose a two-tailed test? How can we tell the direction of the test by looking at a pair of hypothesis?
Do the following: (a) Make a scatter diagram of the scores; (b) describe in words the general pattern of correlation, if any; (c) figure the correlation coefficient.
Reccomend asprin for their patients with children Conduct a hypothesis test using the P-Value method. What conclusions would you make when a=o.2 and a=0.02.
If a proposal evaluator randomly selected two proposals, what is the probability that both of them met the specified?
What is the probability that a diner is an undergraduate and has bought a meal and what is the probability that someone who has bought a meal is a postgraduate?
An experimental study is designed to test the potency of a drug on 16 calves. Previous studies have shown that a 10-mg dose of the drug is lethal 7% of the time within the first 7 hours.
We have a "test" and a "control" group. We calculated a market share percentage for both groups, the test group was in a market that received advertising from our client, the control group was in a market that did not see advertising.
What conditions need to be satisfied for a system of linear inequalities to have its solution in the first quadrant? Create such a system.
Is there sufficient evidence at the 0.05 level of significance to conclude that the proportion of women physicians at the university health system exceeds 27.9%?
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