You want to estimate the mean SAT score of all college applicants. First use the range rule of thumb to make a rough estimate of the standard deviation of those scores. Possible SAT scores range from 600 to 2400. Use the estimated standard deviation to determine the sample size corresponding to a 98% confidence level and a margin of error of 100 points. What isn’t quite right with this exercise?
Answer to relevant QuestionsYou want to estimate the mean amount of annual tuition being paid by current full-time college students in the United States. First use the range rule of thumb to make a rough estimate of the standard deviation of the ...Construct the confidence interval for Exercise assuming that s is known to be 5.013km. Find the confidence interval using the known value of S. Using the 40 LDL cholesterol levels of women listed in Data Set 1, we get this 95% confidence interval estimate: 916.591 6 s2 6 2252.119, and the units of measurement are (mg/dL)2. Identify the corresponding confidence ...The Chapter Problem for Chapter 3 includes the numbers of chocolate chips in a sample of 40 Chips Ahoy regular cookies. The mean is 23.95 and the standard deviation is 2.55. Construct a 90% confidence interval estimate of ...In constructing confidence intervals for s or s2, Table A-4 can be used to find the critical values x2Landx2L only for select values of n up to 101, so the number of degrees of freedom is 100 or smaller. For larger numbers ...
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