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- At one point the average price of regular unleaded gasoline was $3.48 per gallon. Assume that the standard deviation price per gallon is $0.09 per gallon and use Chebyshev's inequality to answer the following. (a) What percentage of gasoline stations had prices within 3 standard deviations of the mean? (b) What percentage of gasoline stations had prices within 2.5 standard deviations of the mean? (a) At least nothing% of gasoline stations had prices within 3 standard deviations of the mean. (Round to two decimal places as needed.) (b) At least nothing% of gasoline stations had prices within 2.5 standard deviations of the mean. (Round to two decimal places as needed.)The effectiveness of a blood-pressure drug is being investigated. An experimenter finds that, on average, the reduction in systolic blood pressure is 18.7 for a sample of size 761 and standard deviation 11.7.Estimate how much the drug will lower a typical patient's systolic blood pressure (using a 99% confidence level).Enter your answer as a tri-linear inequality accurate to one decimal place (because the sample statistics are reported accurate to one decimal place). < μμ <The effectiveness of a blood-pressure drug is being investigated. An experimenter finds that, on average, the reduction in systolic blood pressure is 48.5 for a sample of size 24 and standard deviation 10.5. Estimate how much the drug will lower a typical patient's systolic blood pressure (using a 80% confidence level). Assume the data is from a normally distributed population. Enter your answer as a tri-linear inequality accurate to three decimal places.___ < μ < ___
- The values in the middle of a confidence interval are more likely to be the true value for the parameter than the values near the edges of the interval. True or FalseAssume that a sample is used to estimate a population mean μμ. Find the 99% confidence interval for a sample of size 16 with a mean of 72.4 and a standard deviation of 10.1. Enter your answer as a tri-linear inequality accurate to one decimal place (because the sample statistics are reported accurate to one decimal place). ___?___<u<___?___The effectiveness of a blood-pressure drug is being investigated. An experimenter finds that, on average, the reduction in systolic blood pressure is 24.7 for a sample of size 921 and standard deviation 18.7.Estimate how much the drug will lower a typical patient's systolic blood pressure (using a 80% confidence level).Enter your answer as a tri-linear inequality accurate to one decimal place (because the sample statistics are reported accurate to one decimal place).
- The effectiveness of a blood-pressure drug is being investigated. An experimenter finds that, on average, the reduction in systolic blood pressure is 22.5 for a sample of size 24 and standard deviation 15.5. Estimate how much the drug will lower a typical patient's systolic blood pressure (using a 80% confidence level). Assume the data is from a normally distributed population. Enter your answer as a tri-linear inequality accurate to three decimal places. < μμ <A sociologist is comparing the proportion of teenage boys who receive a text message at least once an hour to the percentage of teenage girls who do. She has collected data from 150 men and 150 women. Which of the following is not a condition that the sociologist should check before creating a confidence interval for the difference in population proportions?The effectiveness of a blood-pressure drug is being investigated. An experimenter finds that, on average, the reduction in systolic blood pressure is 27.8 for a sample of size 25and standard deviation 20.5. Estimate how much the drug will lower a typical patient's systolic blood pressure (using a 95% confidence level). Assume the data is from a normally distributed population. Enter your answer as a tri-linear inequality accurate to three decimal places.
- 140 students at a college were asked whether they had completed their required English 101 course, and 73 students said "yes". Construct the 80% confidence interval for the proportion of students at the college who have completed their required English 101 course. Enter your answer as a tri-linear inequality using decimals (not percents) accurate to three decimal places. < p <The effectiveness of a blood-pressure drug is being investigated. An experimenter finds that, on average, the reduction in systolic blood pressure is 40.4 for a sample of size 889 and standard deviation 11.5.Estimate how much the drug will lower a typical patient's systolic blood pressure (using a 95% confidence level).Enter your answer as a tri-linear inequality accurate to one decimal place (because the sample statistics are reported accurate to one decimal place). < � <A report states that 46% of home owners had a vegetable garden, how large A sample is needed to estimate the true proportion of home owners who have vegetable gardens to within 3% with 95% confidence.