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CRA CDs Inc. wishes mean lengths of "cuts" on a CD to be 132 seconds (2 minutes and 12 seconds). This will permit disk jockeys to have plenty of time for commercials in each 10-minute segment. suppose distribution of the length of cuts follows normal distribution with population standard deviation of 7 seconds. Assume we choose a sample of 18 cuts from various CDs sold by CRA CDs Inc.
Place a 95% confidence interval about the population mean number of down hours per month.
If the company's report is correct, what is the probability that the average balance of an account in the sample is $383 or less?
What is the 99% confidence interval?
Which of the following is NOT true regarding the normal probability distribution.
In an article entitled "Fuel Economy Calculations to Be Altered," James R. Healey indicated that the government planned to change how it calculates fuel economy for new cars and trucks.
The fixed monthly cost of operating the production facility is $3000. How many units of part # 2206 have to be sold in a month to break-even?
State the hypotheses for a right-tailed test.
Sampling area consisted of an area of 120m x 50m within site two and was bordered by a road on one side and a stream on another.
Could you please explain in words how you figure out deciles, quartiles, kurtosis, skewness in Excel? How do you find the sum count, largest, and smallest in Excel?
Suppose in a population of 100,000, the probability that an individual will die from bird flu in a given winter is .00009. If the data fits a Poisson distribution, then the mean number of people in that population that will die from bird flu in on..
The χ 2 statistic from a contingency table with 6 rows and five columns will have:
If X and Y are two independent Poisson random variables, then show that the conditional distribution of X given X+Y is binomial.
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