Question Find the critical value tc for the confidence level c=0.95 and sample size n=21 Looking for a Similar Assignment? Order now and Get 10% Discount! Use Coupon Code “Newclient”
Question RegionPercentageEast35%South32%Midwest25%West56% rowspan=”5″>The table to the right shows the results of a survey in which 400 adults from the East, 400 adults from the South, 400 adults from the Midwest, and 400 adults from the West were asked if traffic congestion is a serious problem. Construct a 99% confidence interval for the proportion of adults from the West who say traffic congestion […]
Question The average math SAT score is 525with a standard deviation of 113A particular high school claims that its students have unusually high math SAT scores. A random sample of 45students from this school was selected, and the mean math SAT score was 569Is the high school justified in its claim? Explain. Yes/no Because the z score […]
Question Use the standard normal distribution or the t-distribution to construct a 95% confidence interval for the population mean. Justify your decision. If neither distribution can be used, explain why. Interpret the results. In a random sample of 21 mortgage institutions, the mean interest rate was 3.62% and the standard deviation was 0.44%. Assume the interest rates are normally […]
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