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If the standard deviation of the lifetime of a vacuum cleaner is estimated to be 300 hours, how large of a sample must be taken in order to be 97% confident that the margin of error will not exceed 40 hours?
Use your calculator to find the mean and standard deviation for the 9 observations that remain when you leave out the outlier. How does the outlier affect the values of x and s? Is s a resistant measure of spread?
The Grand Strand Family Medical Center is specifically set up to treat minor medical emergencies for visitors to the Myrtle Beach area. There are two facilities, one in the Little River Area and the other in Murrells Inlet.
How many individuals will it need to sample to achieve this level of accuracy and confidence?
Students from the class for an oral exam, what is the probability that 3 female students and 5 male students will be selected?
The standard deviation is 4. what is the best point estimate of the mean? find the 95% confidence interval of the mean score for golfers.
Private university loan default rate is below the rate for all universities, using a left-tailed test at s=.01? Calculate the p-value. Verfify the assumption of normality is justified
determine the confidence level for each of the following large-sample one-sided confidence bounds.a upper bound x
The interpretation of natural logarithms and common logarithms
The animal colony in the reseach department contains 20 male rats and 30 female rats. Of the 20 males, 15 are white and 5 spotted. Of the 30 females, 15 are white, and 15 are spotted.
Last week Sarah had exams in Math and in Spanish. On the Math exam, the mean was u, = 30 with a = 5, and Sarah had a score of X - 45. On the Spanish exam, the mean was u, = 60 with 0 = 6 and Sarah had a score of X = 65. For which class must Sarah ..
11.9% reported they were in fair or poor health, including 10.5% of the married people, 19.6% of widows, 16.7% of divorced or separated, 12.5% of those never married, and 14% of those living with an unmarried partner.
That only 94 percent of the booked passengers actually show up for the flight. Find the probability that if the airline books 16 persons, not enough seats will be available.
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