A random sample of 16 men have a mean height of 67.5 inches and a standard deviation of 1.8 inches. Construct a 99% confidence interval for the population standard deviation,σ.
A random sample of 16 men have a mean height of 67.5 inches and a standard...
A pediatrician's records showed the mean height of a random sample of 25 girls at age 12 months to be 29.530 inches with a standard deviation of 1.0953 inches. Construct a 95% confidence interval for the population variance. (Round your answers to 4 decimal places.) The 95% confidence interval is from____ to ____
Height data, collected from a statistics class, has a mean, X = 68.21 inches, and a standard deviation of s=4.01 inches. The sample size of the data was n = 36. Suppose the data collected could be considered a random sample of WCU students. Calculate the lower boundary of a 99% confidence z-interval. Give your answer as a decimal number rounded to 2 decimal places. INinto nu can use the calculator to find this solution or do this by hand)...
A random sample of 300 students was found to have a mean height of 64 inches and standard deviation of 2.3 inches. What is the standard error of the mean? (Assume that the population from which the 300 students are drawn is much larger than 300.)
. Estimating the mean height of men in your city (a) Select a random sample of 25men from a city or use a public website to get a sample of men's heights. Record the men's heights in inches (b) Describe how the sample is obtained (c) Make a stemplot for the data (d) Find the mean and standard deviation of the 25men's heights inches e)finches (f) Give an85% confidence interval for the mean height of all men in the city...
In a simple random sample of 64 households, the sample mean number of personal computers was 1.17. Assume the population standard deviation is σ = 0.23. 19) Why can we say the sampling distribution of the sample mean number of personal computers is approximately normal? 20) Construct a 98% confidence interval for the mean number of personal computers. Interpret this interval. 21) The population standard deviation for the height of high school basketball players is three inches. If we want...
A student researcher compares the heights of men and women from the student body of a certain college in order to estimate the difference in their mean heights. A random sample of 12 men had a mean height of 70.7 inches with a standard deviation of 2.41 inches. A random sample of 17 women had a mean height of 62.7 inches with a standard deviation of 3.07 inches. Determine the 98 % confidence interval for the true mean difference between...
A random sample of 250 persons yields a sample mean of 110 and a sample standard deviation of 10. Construct three different confidence intervals to estimate the population mean, using 95%, 99%, and 99.9% levels of confidence. What happens to the interval width as the confidence level increases? Why?
Assume that the height of men are normally distributed with a mean of 69.8 inches and a standard deviation deviation of 3.5 inches. If 100 men are randomly selected, find thr probability that they have a mean height greater than 69 inches. Asume that the heights of men are normally distributed with a mean of 69.8 inches and a standard deviation of 3.5 inches of 100 men wa randomly selected in the probability that they have a meaning greater than...
A. A random sample of 32 different juice drinks has a mean of 98 calories per serving and a standard deviation of 31.5 calories. Construct a 99% confidence interval of the population mean number of calories per serving, and interpret the 99% confidence interval in 1 sentence: B. A random sample of 50 standard hotel rooms in Philadelphia, PA, has a mean nightly cost of $189.99 and a standard deviation of $35.25. Construct a 95% confidence interval of the mean...
Construct a 95% confidence interval for the population standard deviation sigma of a random sample of 15 men who have a mean weight of 165.2 pounds with a standard deviation of 12.5 pounds. Assume the population is normally distributed.