MATLAB: An Introduction with Applications
6th Edition
ISBN: 9781119256830
Author: Amos Gilat
Publisher: John Wiley & Sons Inc
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Express the confidence interval (25.4%,42.8%) in the form of p^±ME.
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- A random sample of accountants were asked whether they double-check their calculations on a tax form. The resulting confidence interval for the proportion of accountants who double-check their work is (0.89,0.97). What is the sample proportion, p^?arrow_forwardA random sample of 30 adult bottlenose dolphin was found to have a mean weight of 550 pounds with a standard deviation of 50 pounds. What will be the range of values for the estimate with a 90% confidence level? In answer box, provide only the high value. Round the answer to 2 decimal places.arrow_forward< A clinical trial was conducted to test the effectiveness of a drug for treating insomnia in older subjects. Before treatment, 14 subjects had a mean wake time of 100.0 min. After treatment, the 14 subjects had a mean wake time of 96.9 min and a standard deviation of 21.5 min. Assume that the 14 sample values appear to be from a normally distributed population and construct a 90% confidence interval estimate of the mean wake time for a population with drug treatments. What does the result suggest about the mean wake time of 100.0 min before the treatment? Does the drug appear to be effective? *** Construct the 90% confidence interval estimate of the mean wake time for a population with the treatment. min<arrow_forwardYou want to examine the effectiveness of a new tutoring program at SWC. A sample of n=9 stats students is used to evaluate t. Each students grade point average is recorded before the program and after the program. The average GPA improved by Mp=0.60 points with s^2 =0.09. the researcher would like to use the sample to estimate how much effect the workshop would have for the entire college population. Which of the following is the 80% confidence interval for these data? A. μD=0.60 + 0.10(1.397) B. μD=0.60 + 0.09(1.860) C. μD=0.60 + 0.01(1.397) D. μD =0.60 + 0.10(1.860)arrow_forwardExpress the confidence interval (21.8%,29.4%) in the form of p^±E.% ± %arrow_forwardAccording to statistics released by CNBC, the number of vehicles that are not insured is staggering. CNBC's sample results indicate that 44 out of 80 vehicles were uninsured. Give a 95% confidence interval for the population proportion of the form p^ ± E where p^ is the point estimator of the proportion and E is the margin of error. Select one: a. The interval is 0.450 ± 0.109. b. The interval is 0.550 ± 0.143. c. The interval is 0.450 ± 0.091. d. The interval is 0.550 ± 0.091. e. The interval is 0.550 ± 0.109.arrow_forwardA marketing research company is estimating which of two soft drinks college students prefer. A random sample of 110 college students produced the following 95% confidence interval for the proportion of college students who prefer drink A: (0.228, 0.603). Identify the point estimate (p^p^) for estimating the true proportion of college students who prefer that drink. Round to the nearest thousandth.arrow_forwardIf n = 300 and ˆpp^ (p-hat) = 0.95, construct a 99% confidence interval.Give your answers to three decimals <p<arrow_forwardIf n = 520 and ˆpp^ (p-hat) = 0.55, construct a 90% confidence interval.Give your answers to three decimals < p <arrow_forwardarrow_back_iosarrow_forward_ios
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