Answer Happy

Suppose the average national reading level for all high school sophomores is 150 words per minute, with a standard deviation of 15 minutes. A local school board member wants to know if sophomore students at Lincoln High School read at a level that is different from the national average for high school sophomores. The significance level of the test is to be set at 0.05, which results in the power of the test being 0.9. In a random sample of 40 Lincoln High School sophomores, the mean reading level is found to be 157 words per minute. Choose the appropriate hypotheses for this test: Ho Hua 150 With 95 150 If the mean reading level at Lincoln High School is 150, what is the probability that we decide it isn't 150 005 If the mean reading level at Lincoln High School isn't 150, what is the probability that there won't be enough evidence to show that? 0.2 We should conduct az test because we know . the population standard deviation What is the value of the test statistic, written to two decimal places? 2.95 What is the p-value for the test, written to three decimal places? 0.002 Is this a right, left, or two-tailed fest? Right $ Our decision should be to support the alternative hypothesis At the 0.05 significance level, there i enough evidence to support the claim that the mean reading level at Lincoln High School is more than words per minute % confidence, the true mean reading level is between 143 and 155 0 150 words per minute