It is believed that nearsightedness affects about 8% of all children. In a random sample of 194 children, 21 are nearsighted. (a) Construct hypotheses appropriate for the following question: do these data provide evidence that the 8% value is inaccurate? O Ho: p = .08 Ha: p < .08 Ho: p = .08 Ha: p.08 O Ho: p = .08 Ha: p > .08 (b) What proportion of children in this sample are nearsighted? (round to four decimal places) (c) Given that the standard error of the sample proportion is 0.0195 and the point estimate follows a nearly normal distribution, calculate the test statistic (use the Z-statistic). Z = (please round to two decimal places)
It is believed that nearsightedness affects about 8% of all children. In a random sample of 194 children, 21 are nearsighted. (a) Construct hypotheses appropriate for the following question: do these data provide evidence that the 8% value is inaccurate? O Ho: p = .08 Ha: p < .08 Ho: p = .08 Ha: p.08 O Ho: p = .08 Ha: p > .08 (b) What proportion of children in this sample are nearsighted? (round to four decimal places) (c) Given that the standard error of the sample proportion is 0.0195 and the point estimate follows a nearly normal distribution, calculate the test statistic (use the Z-statistic). Z = (please round to two decimal places)
Holt Mcdougal Larson Pre-algebra: Student Edition 2012
1st Edition
ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL
Chapter11: Data Analysis And Probability
Section: Chapter Questions
Problem 8CR
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