Help Submit Save & Exit The mean weight of trucks traveling on a particular section of I-475 is not known. A state highway inspector needs to estimate the population mean. He selects and weighs a random sample of 49 trucks. The mean weight of the 49 trucks was 15.8 tons. Assume for purposes of this problem that the population standard deviation is known, and it is 3.8 tons. What is the 95% confidence interval for the population mean? Multiple Choice 14.7 and 16.9 13.2 and 17.6 10.0 and 20.0 16.1 and 18.1 Mc Graw Hill Edecation Next 4 of 10 < Prev 415 AM Type here to search 11/17/2019

A student randomly selects 10 paperbacks at a store. The sample standard deviation is $1.50. Construct a 95% confidence interval for the population standard deviation, o. Assume the data are normally distributed. Don't write the dollar sign in your answers. Lower = Upper =

The University of Montana admission standards require students to have an ACT score of at least 22. We know that Montana ACT scores are normally distributed with a mean of 20.1 and a standard deviation of 4. A: Students in Oregon have a mean ACT score of 21.1 with a standard deviation of 2.8. If we chose one student each at random from Oregon and from Montana, which student would be more likely to meet the ACT requirements of the University of Montana? Explain your answer using the appropriate statistics and a correctly labeled and shaded normal distribution. B: We know that the Montana ACT scores are normally distributed with a mean of 20.1 and a standard deviation of 4. Assume that the top 2% of individuals in the state are eligible for a state-funded scholarship. What score does an individual need on the ACT to be eligible? Explain your answer using the appropriate statistics and a correctly labeled and shaded normal distribution

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Assume that population mean is to be estimated from the sample described. Use the sample results to approximate the margin of error and​ 95% confidence interval.   n=49​, x=55.1 ​seconds, s=4.8 seconds       The margin of error is nothing seconds.

Please assist with a,b,c C. Is the p value greater than or lesser than the level of significance? Is there enough evidence to support the claim?

A primary measure of dispersion for sample data is the sample standard deviation, s.  Choose the best option to explain what the meaning of the sample standard deviation is, in general.   A. The distance between one observation and the mean. B. The average distance of an observation from the middle of the distribution. C. The average distance between observations in the sample. D. The distance between the third and first quartiles.

You are given the smaple mean and the population m standard deviation. Use this info to construct the 90% and 95% confidence intervals for the population mean. Interpert the results and compare the widths of the confidence intervals. A random sample of 50 home theater systems has a mean price of $145. Assume the population standard deviation is $17.30

A population mean is 13. The sample mean is 12.8, and the sample standard deviation is 2. The sample size is 20. What standard error would you use to conduct a hypothesis test on the mean?

From the set of numbers 10,17,19,20,22 The mean is 17.6 Median is 19 Mode is no mode. make 1st, 2nd, and 3rd quartiles, then sketch a box and whisper plot.