The assets (in billions of dollars) of the four wealthiest people in a particular country are 44, 27, 22, 19. Assume that samples of size n = 2 are randomly selected with replacement from this population of four values. a. After identifying the 16 different possible samples and finding the mean of each sample, construct a table representing the sampling distribution of the sample mean. In the table, values of the sample mean that are the same have been combined. Probability Probability X 44 35.5 33 31.5 27 (Type integers or fractions.) *** X 24.5 23 22 20.5 19

Suppose it is known that 37% of Camp Crystal Lake campers return the next summer. A random sample of 15 campers was selected. 3. (Describe the distribution of the number of campers that return the next summer.

Insurance componies track life expertancy info to assist in determining the cost of life insurance polocies. The insurance compony knows that last year the life expectancy of its polocy holders was 77 years. They want to know if their clients this year have a longer life expectancy, on average, so the company randomy samples some of the recently paid polices to see if the mean life expectancy of polcy holders has increased.   Sample: 86,75, 83, 84, 81, 77, 78, 79, 79,81, 76, 85, 70,76, 79,81, 73, 74, 72, 83. 1) Does this sample indicate that the insurance company should change its premiums because life expectancy has increased?  2) For more accurate cost determination, the insurance companies want to estimate the life expectancy to within one year with 95% confidence. How many randomly selected records would you need to have?

Help please week 7

I need help with this one please thank you.

What effect does increasing the sample size have on the​ probability? Provide an explanation for this result. Choose the correct answer below.     A. The probability increases because the variability in the sample mean decreases as the sample size increases.   B. The probability increases because the variability in the sample mean increases as the sample size increases.   C. The probability decreases because the variability in the sample mean increases as the sample size increases.   D. The probability decreases because the variability in the sample mean decreases as the sample size increases.

The ages​ (in years) of a random sample of shoppers at a gaming store are shown. Determine the​ range, mean,​ variance, and standard deviation of the sample data set. 12, 20, 23, 13, 18, 17, 22, 17, 15, 16 The range is The mean is ( Simplify your answer. Round to the nearest tenth as​ needed.) The variance is (Simplify your answer. Round to the nearest hundredth as​ needed.) The standard deviation is (Simplify your answer. Round to the nearest tenth as​ needed.) Can you please explain me this math problem having trouble understanding. Thank you.

fill in blank, there are only 3 options, decreases, increases or remain the same.

Five pulse rates are randomly selected from a set of measurements. The five pulse rates have a mean of 67.0 beats per minute. Four of the pulse rates are 54, 82, 53, and 90. a. Find the missing value. b. Suppose that you need to create a list of n values that have a specific known mean. Some of the n values can be freely selected. How many of the n values can be freely assigned before the remaining values are determined? (The result is referred to as the number of degrees of freedom.) a. The missing value is beats per minute. (Type an integer or a decimal. Do not round.)

Five pulse rates are randomly selected from a set of measurements. The five pulse rates have a mean of 76.6 beats per minute. Four of the pulse rates are 82, 59, 84, and 89. a. Find the missing value. b. Suppose that you need to create a list of n values that have a specific known mean, Some of the n values can be freely selected. How many of the n values can be freely assigned before the remaining values are determined? (The result is referred to as the number of degrees of freedom.)