# Question: The mean age of all 2550 students at a small

The mean age of all 2550 students at a small college is 22.8 years with a standard deviation is 3.2 years, and the distribution is right-skewed. A random sample of 4 students' ages is obtained, and the mean is 23.2 with a standard deviation of 2.4 years.

a. µ =? σ =? x =? s =?

b. Is m a parameter or a statistic?

c. Are the conditions for using the CLT fulfilled? What would be the shape of the approximate sampling distribution of many means, each from a sample of 4 students? Would the shape be right-skewed, Normal, or left-skewed?

a. µ =? σ =? x =? s =?

b. Is m a parameter or a statistic?

c. Are the conditions for using the CLT fulfilled? What would be the shape of the approximate sampling distribution of many means, each from a sample of 4 students? Would the shape be right-skewed, Normal, or left-skewed?

**View Solution:**## Answer to relevant Questions

A random sample of 10 colleges from Kiplinger’s 100 Best Values in Public Education was taken. The mean rate of graduation within four years was 43.5% with a margin of error of 6.0%. The distribution of graduation rates is ...A researcher collects a sample of 25 measurements from a population and wants to find a 99% confidence interval. a. What value should he use for t*? (Recall that df = n - 1 for a one-sample t-interval.) Use the table given ...In Exercise 9.31, two intervals were given for the same data, one for 95% confidence and one for 90% confidence. a. How would a 99% interval compare? Would it be narrower than both, wider than both, or between the two in ...The distribution of the scores on a certain exam is N(70, 10), which means that the exam scores are Normally distributed with a mean of 70 and standard deviation of 10. a. Sketch the curve and label, on the x-axis, the ...Using the data from Exercise 9.46 on dancers’ heights, find a 95% confidence interval for the mean height. Also, if you had used a two-sided alternative (Instead of the one-sided alternative used in Exercise 9.46) and had ...Post your question