# A clinical trial was conducted to test the

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25.) A clinical trial was conducted to test the effectiveness of a drug used for treating insomnia in older subjects. After treatment with thedrug, 11 subjects had a mean wake time of 92.6 min and a standard deviation of 44.9 min. Assume that the 11 sample values appear to be from a normally distributed population and construct a 95% confidence interval estimate of the standard deviation of the wake times for a population with the drug treatments. Does the result indicate whether the treatment iseffective?a.) Find the confidence interval estimate.
b.) Does the result indicate whether the treatment iseffective?
STAT 211 Module 8 Homework2.) A(n)________ is a point lying far away from other data points on a scatterplot.
4.) Given the linear correlation coefficient r and the sample size n, determine the critical values of use your finding to state whether or not the given rrepresents a significant linear correlation. Use a significance level of 0.05.r and
5.) Given the linear correlation coefficient rand the sample size n, determine the critical values of ruse your finding to state whether or not the given r represents a significant linear correlation. Use a significance level of 0.05.and
6.) Given the linear correlation coefficient rand the sample size n, determine the critical values of ruse your finding to state whether or not the given rrepresents a significant linear correlation. Use a significance level of 0.05. and
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7.) Find the value of the linear correlation coefficient r. The paired data below consist of the temperatures on randomly chosen days and the amount a certain kind of plant grew(in millimeters).Temperature627650517146514479Growth36395013333317616A: 0.1968.) Find the value of the linear correlation coefficient r. The paired data below consist of the costs of advertising(in thousands ofdollars) and the number of products sold(in thousands).Cost923425910Number8552556867868373A: 0.708
9.) Suppose you will perform a test to determine whether there is sufficient evidence to support a claim ofa linear correlation between two variables. Find the critical values of rgiven the number of pairs of data and the significance level αn
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