Sample means for random samples of adults

Assignment Help Basic Statistics

Reference no: EM131772631

Question: According to the Sacramento Bee (2 April 1998, p. F5), Americans get an average of 6 hours and 57 minutes of sleep per night. A survey of a class of 190 statistics students at a large university found that they averaged 7.1 hours of sleep the previous night, with a standard deviation of 1.95 hours.

a. Assume that the population average for adults is 6 hours and 57 minutes, or 6.95 hours of sleep per night, with a standard deviation of 2 hours. Draw a picture similar, illustrating how the Rule for Sample Means would apply to sample means for random samples of 190 adults.

b. Would the mean of 7.1 hours of sleep obtained from the statistics students be a reasonable value to expect for the sample mean of a random sample of 190 adults? Explain.

c. Can the sample taken in the statistics class be considered to be a representative sample of all adults? Explain.

Reference no: EM131772631

Questions Cloud

Calculate the market price of a share : You are given the following information: Stockholder's equity= $1.250; price/earning ratio=5; shares outstanding= 25; and market/book ratio=1.5.

What is the expected price for his firm in five years : A justified P/E ratio of 13.5 can be used in the valuation of this stock. What is the expected price for his firm in five years?

What is the value of the stock : a. If the required return for Superior is 21 percent, what is the value of the stock?

How much must you remit for the purchase : You purchase the bond on February 1, 2005 at a price to yield 8%. and your broker charges a $25 commission. How much must you remit for the purchase?

Sample means for random samples of adults : Assume that the population average for adults is 6 hours and 57 minutes, or 6.95 hours of sleep per night, with a standard deviation of 2 hours.

Compute the cost of a single unit of product : Compute cost of a single unit of product under both the absorption costing and variable costing approaches. The Dean Company produces and sells a single product

How much would her balance be : She obtained this mortgage at annual interest of 4.5% for 30 years. How much would her balance be?

What is the total of these last five payments : She paid all the monthly payments except the last five payments, which she wants to pay all at once.

Calculate the amount of life insurance linda : Based on the total loss estimation by the "Needs Approach" calculate the amount of life insurance Linda needs to buy, given that the interest rate is 9.5%

User Account

All Pages