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Average of 4.0 hours of television per person per day. The standard deviation of the number of hours of television watched per day is 2.1 and random sample of 250 americans is selected, the mean of this sample belongs to a sampling distribution. What is the shape of this sampling distribution?
Based on data from a car bumper sticker study, when a car is randomly selected, the number of bumber stickers and corresponding probabilities are shown below.
The college theater department recently staged a production of a modern musical. A researcher recorded the gender of each student entering the theater and found a total of 385 females and 215 males.
Collect on its accounts receivable is 36 with a standard deviation of 11 days. What is the probability that a single AR account takes more than 30 days to collect?
They then call these 100 people. Does this sampling plan result in a random sample? Simple random sample? Explain.
The given data show the age distribution of top 14 doctors in emergency faculty of local hospital.
Use the population mean and standard deviation to find the z-score corresponding to 14.5%, the rate offered by the Bar Harbor Bank and Trust Company. Is this above or below the average?
A teacher gives a pre and post test to her students, she wants to know if there is a difference in the number of points students earned on their pretest and post test.
if i have been approved for a $70,000 loan toward the purchase of a new home at 12% interest. The mortgage is for 30 years. How much are the approximately annual payments of the loan? Hint: Assume you pay yearly.
Provide a brief description of the variable and whether the scale of measurement is nominal, ordinal, interval, or ratio, and why. Explain what it means to say that this variable is "normally distributed."
On average, you receive 2 telemarketing calls per day. What is the probability that you will not receive any telemarketing calls today.
In a certain city, there are 100,000 persons age 18 to 24. A simple random sample of 500 such persons is drawn, of whom 198 turn out to be currently enrolled in college.
A box in a certain supply room contains four 40 w light bulbs, five 60-W bulbs, and six 75-W bulbs. If two are randomly selected from the box and at least one of them is found to be rated 75-W.what is the probability that both of them are 40- W bu..
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