according to a recent report, the population distribution of the number of years of education for self employed in the u.s has a mean of 13.6 and a standard deviation of 13.0 a. identify the random variable whose population distribution is being described b. are the mean and standard deviation...

Jan s restaurant chargers $8.95 for a buffet style Sunday brunch. This price is determined by operating cost and food cost. The distribution of the price is right skewed with a mean of $8.20 and standard deviation of $3.00. a. If 100 randomly selected customers eat at Jan s this Sunday...

2. The table shows an excerpt of a printout for analyzing murder rates (per 100,000) in the United States. The first column describes the crime figure for all 50 states and Washington DC. The second column refers to only the 50 states. n 51 50 Mean 5.6 4.8 SD 6.05 2.57 Max 44 13 75%...

Average balance of credit card in Hang Road was $4925 surpassing the $4284 national average by 15%. A national market believes that approximately 25% of all persons between age 23 to 38 in the region who received "Abandon your credit card" emails will actually respond to these...

3. A university math department administers a placement exam that all prospective students take. The exam and is graded on the typical 0 to 100 point scale. The score distribution is roughly symmetric, has a median 56, and a range of 93. Estimate the standard deviation and justify your...

an investor owns three common stocks. Each stock, independent of each others, has equally likely chances to increase in value, decrease in value, or remain the same. Estimate the probability at least two of the stocks increase in value.

a crossover trial is conducted to compare an experimental medication for migraine headaches to a currently available medication. A total of 50 patients are enrolled in the study and each patient receives both treatments. The outcome is the time, in minutes, until the headache pain resolves....

A machine that fills bottles is known to have a mean filling amount of 125 grams and standard deviation of 20 grams. A quality control manager took a random sample of filled bottles and found the sample mean to be 130. The quality control manager assumed the sample must not be representatives. Is...

It is known from past experience that the life of a machine component is approximately normally distributed with mean equal to 200 hours and a standard deviation of 4 hours. Calculate the probability that a randomly selected componet has a life of a)at least 206 hours b) between 204 hours and...

Can you help with these problems? 1. Draw a bell curve for each one of the following normal probability distributions: the standard, the sat and Binet Intelligence scale. Draw a separate bell curve for each one and the combine all there into a single bell curve, with the standard first, next...