A researcher is testing whether adults that play cross-word puzzles have a better than average memory. A sample of 62 adults who regularly complete cross-word puzzles were given a standardized memory test. The mean score for the sample was 30.1. For the general population of adults, the distribution of test scores is normal with a mean of μ = 27.4 and a standard deviation of σ =13.2. At the 0.01 level of significance do adults that complete cross-word puzzles have significantly better memory scores than a mean of 27.4? State the hypotheses. 1)Compute the test statistic. Include if it is z, t or ?? . 2)Find the critical value(s) OR the p-value. 3)Make the decision about the null hypothesis.
A researcher is testing whether adults that play cross-word puzzles have a better than average memory. A sample of 62 adults who regularly complete cross-word puzzles were given a standardized memory test. The mean score for the sample was 30.1. For the general population of adults, the distribution of test scores is normal with a mean of μ = 27.4 and a standard deviation of σ =13.2. At the 0.01 level of significance do adults that complete cross-word puzzles have significantly better memory scores than a mean of 27.4?
State the hypotheses.
1)Compute the test statistic. Include if it is z, t or ?? .
2)Find the critical value(s) OR the p-value.
3)Make the decision about the null hypothesis. (Conclude the test.)
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