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What is minimum sample size required to estimate a mean within 2 with 95% confidence if the sample standard deviation is 20?
An airline finds that 5% of the persons making reservation on a certain flight will not show up for the flight. If the airline sells 180 tickets for a flight with only 175 seats,
Suppose the national average for all young adults is 3.7 hours, and the magazine wishes toclaim that their subscribers exercise more on average. State the relevant hypotheses to test this claim. Specifically define any symbols you use.
Reis, Inc., a New York real estate research firm, tracks the cost of apartment rentals in the United States. In mid-2002, the nationwide mean apartment rental rate was $895 per month
consider the set of odd single-digit integers 13579.a make a list of all samples of sixe 2 that can be drawn from this
How many boxes must the processor sample to be 95 percent confident that the sample mean does not differ from the population mean by more than 0.2 pounds?
you are trying to estimate the number of csn students with iphones. a random sample of 130 students reveals that 65 of
Your workplace reduces all workplace scores on particular employee aptitude test in z-scores which are placed in district-wide distribution of scores.
A commuter travels many miles to work each morning. She has timed this trip 5 times throughout the last month. The time (in minutes) required to make this trip was 44, 39, 41, 35, and 41.
a job only hires applicants who score 2 standard deviations or more above the mean on a skills test. if the mean is 77
Proportions of defective chips are 4.0% and 6.0% respectively. Using a confidence level of 95%. Which statement is supported by data?
At the .05 significance level, is the number of units produced on the afternoon shift larger?
Standard deviation of 14 inches. What is the probability that the mean annual snowfall will be between 70 and 80 inches.
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