Answer:
Given that the population is not normal. For using t-distribution the population must follow normal distribution. So,
You should not use the t procedure because the population does not have a normal distribution.
Option 2 is correct.
You are thinking of using a r procedure to construct a 95% confidence interval for the...
You are thinking of using a t procedure to test hypotheses about the mean of a population using a significance level of 0.05. You suspect that the distribution of the population is not normal and may be moderately skewed. Which of the following statements is correct? (A) You may use the t procedure provided your sample size is large. (B) You should not use the t procedure because the population does not have a normal distribution. (C) You may only...
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Confidence Intervals 9. Construct a 95 % confidence interval for the population mean, . In a random sample of 32 computers, the mean repair cost was $143 with a sample standard deviation of $35 (Section 6.2) Margin of error, E. <με. Confidence Interval: O Suppose you did some research on repair costs for computers and found that the population standard deviation, a,- $35. Use the normal distribution to construct a 95% confidence interval the population mean, u. Compare the results....
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 In a recent season, the population standard deviation of the yards per carry for all running backs was 1.21. The yards per carry of 25 randomly selected running backs 2.8 be used, explain why. Interpret the results are shown below. Assume the yards per carry are normally distributed 2.7 3.7 4.7 7.1 3.7 5.9 2.5...
Use technology and the given confidence level and sample data to find the confidence interval for the population mean u. Assume that the population does not exhibit a normal distribution. 95% confidence Weight lost on a diet **3.0 kg n=51 s5.4 kg nd Master- What is the confidence interval for the population mean u? Okg u kg (Round to one decimal place as needed.) Is the confidence interval affected by the fact that the data appear to be from a...
You construct a 95% confidence interval for a population mean using a random sample. The confidence interval is 24.9 less thanmuless than31.5. Is the probability that mu is in this interval 0.95? Explain.
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Use the given level of confidence and statistics to construct a confidence interval for the population mean µ. Assume that the population has a normal distribution. A laboratory tested twelve chicken eggs and found that the mean amount of cholesterol was 185 milligrams with s= 17.6 milligrams. Construct a 95% confidence interval for the true mean
You want to construct a 95% confidence interval for the performance of a large population of mutual funds. Assume returns are independent across funds, and the standard deviation of fund returns is 8.1 %. If you want the width of your interval to be 2.4 %, what sample size must you collect? Assume sample is large enough that the sample mean is normally distributed. Enter answer as the smallest integer sample that will accomplish your objective. I need it to...