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Suppose that 95% of the bags of a certain fertilizer mix weigh between 49 and 53 pounds. Averages of three successive bags were plotted, and 47.5% of these were observed to lie between 51 and X pounds. Estimate the value of X. State the assumptions you make and say whether these assumptions are likely to be true for this example.
a cell phone service provider has selected a random sample of 20 of its customers in an effort to estimate the mean
question an investigator hypothesizes that cholesterol level in children might be affected by educating
the average annual age of doctors in a certain hospital is 44.0 years old with a standard deviation of 4.0 years.
Why do you think a reduction in LOS would be seen, in management terms, as an improvement in performance, all other things being equal?
Give three logically possible directions of casualty, indicating for each direction whether it is a reasonable explanation for the correlation in light of the variables involved (and why).
A recent survey indicated that 82% of single women aged 25 years old will be married in their lifetime.
Kroger, a grocery store chain, wants to identify the ideal store layout for increasing store sales. Because it primarily uses two store designs, one a grid layout with vertical aisles divided by a center aisle and another using a traditional strai..
Transform blood protein values. Refer to the previous exercise. With strongly skewed distributions such as this, we frequently reduce the skewness.
1.an inspector inspects large truckloads of potatoes to determine the proportion p with major defects prior to using
a job only hires applicants who score 2 standard deviations or more above the mean on a skills test. if the mean is 77
a researcher has developed a new drug designed to reduce blood pressure. in an experiment 21 subjects were assigned
researchers found a correlation coefficient of r .50 on personality measures for identical twins. a reporter
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