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Shearson Lehman Brothers, Inc., now encourages its investors to consider real estate limited partnerships. The company offers two limited partnerships-one in a condominium project in Chicago and one in Dallas. Annualized rates of return for the two investments during separate eight-month periods are as follows. Is one type of investment better than the other? Explain.
Chicago (%): 12, 13, 10, 14, 15, 9, 11, 10
Dallas (%): 10, 9, 8, 7, 9, 11, 6, 13
Each contact will result in either no sale or a $50,000 sale, with the probabilities .9 and .1, respectively. Give the probability distribution for daily sales. Find the mean and standard deviation of the daily sales.
What is an estimate of the proportion defective for the piston manufacturing process when it is control? Construct a p chart for the manufacturing process, assuming each sample has 200 pistons.
The mean construction time for a standard two-car garage by Arrowhead Construction Company is 3.5 days. The time for the construction process follows the normal distribution.
A machine produces parts with lengths that are normally distributed with ? = 0.59. A sample of 19 parts has a mean length of 76.26.
A study of 35 professors showed that the average time they spent creating test questions was 13.5 minutes per question. The standard deviation of the population is 3.8. Which of the following is the 99% confidence interval for the average number o..
Families in a certain area that are living below the poverty level. If this proportion is roughly 0.15, what sample size is necessary so that the standard error of the estimate is 0.02?
How many treatment conditions were compared in the study? How many individuals participated in the study?
if r -0.665 and n 6 test the significance of the correlation coefficient at a .05 reject p 0 because 2.68gt 2.57do not
Find a 90% confidence interval on the difference in the mean number of production units for the two shifts.
Consider the following portion of an electric circuit with three relays. Current will flow from point A to point B if there is at least one closed path when the relays are activated. The relays may malfunction and not close when activated.
How many bacteria will be in the culture at midnight the next night?
If a patient from a study of 1000 people, who are equally divided into two groups (those taking a placebo and those taking Prozac), is experiencing nausea, what is the probability that he/she is taking Prozac?
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