Question: On a standard test of motor coordination a sports psychologist
On a standard test of motor coordination, a sports psychologist found that the population of average bowlers had a mean score of 24, with a standard deviation of 6. She tested a random sample of 30 bowlers at Fred’s Bowling Alley and found a sample mean of 26. A second random sample of 30 bowlers at Ethel’s Bowling Alley had a mean of 18. Using the criterion of p = .05 and both tails of the sampling distribution, what should she conclude about each sample’s representativeness of the population of average bowlers?
Relevant Questions(a) In question 20, if a particular sample does not represent the population of average bowlers, what is your best estimate of the µ of the population it does represent? (b) Explain the logic behind this conclusion. The mean of a population of raw scores is 50 (σx = 18). (a) Using the z-table, what is the relative frequency of sample means below 46 when N = 40? (b) What is the probability of randomly selecting a sample of 40 scores ...(a) What are the advantage and disadvantage of two-tailed tests? (b) What are the advantage and disadvantage of one-tailed tests? Poindexter claims that the real cheating occurs when we increase power by increasing the likelihood that results will be significant. He reasons that if we are more likely to reject H0, then we are more likely to do so when ...(a) What does a sampling distribution of means show? (b) A mean having a z beyond ±1.96 is where? (c) How often do means in the region of rejection occur when dealing with a particular raw score population? (d) What does ...
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