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Consider the situation in the previous problem, and assume that the distribution holds for all weeks throughout the year and that weekly orders are independent from week to week. Let Y denote the number of weeks in the year in which no orders are received (assume a year of 52 weeks).
a. What kind of random variable is Y? Explain.
b. What is the expected number of weeks with no orders?
Can we conclude a difference in means? YES or NO (circle one)
Construct a boxplot to show the difference between the mean scores of the 2 groups.
The mean number of hours of flying time for pilots at Continental Airlines is 49 hours per month (The Wall Street Journal, February 25, 2003).
A business has 5 telephone lines. The first rings every minute on the average, the second every ½ minute, the third every 2 minutes, the fourth every 5 minutes,
The average thickness of books on a library shelf is 8.3 centimeters.the standard deviation is 0.6 centimeter. If 20% of the books are oversied, find the minimum thickness of the oversized books on the library shelf.
michaels teacher informed him that his score of 98 on the last algebra test corresponded to a z-score of -2.12. which
a and b flip coins. a starts and continues flipping until a tail occurs at which point b starts flipping and continues
A manufacturer of a chemical used in glue, attempting to control the amount of a hazardous chemical its workers are exposed to, has given instructions to halt production if the mean amount in the air exceeds 3.0 ppm.
A recent article in a computer magazine suggested that the mean time to fully learn a new software program is 40 hours. A sample of 100 first-time users of a new statistics program revealed the mean time to learn it was 39 hours with the standard dev..
A farm brings 15 tons of watermelon to market. Find a 90% confidence interval for the population mean cash value of this crop. What is the margin of error?
the average weekly stock prices of overseas trading inc. a u.s. based multinational company can be estimated from
1. for a population that is normally distributed with a mean of 100 and standard deviation of 10 what value would
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