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The weights of domestic, adult cats are normally distributed with a mean of 10.42 pounds and a standard deviation of 0.87 pounds. A cat food manufacturer sells three types of foods for underweight, normal, and overweight cats. The manufacturer considers the bottom 5% of the cats underweight and the top 10% overweight. Compute what weight range should be specified for each of the three categories.
Briefly explain how the standard deviation influences outcome of hypothesis test. How does σ influence measures of effect size?
Define correlation. Then give an example of a misleading correlation and an example of a meaningful correlation. With this describe the relationship between correlation and causation.
Critically discuss why you would or would not expect each of the following variables to be normally distributed.
In a perfectly symmmetrical distribution: a) the range equals the interquartile range b) the interquartile range equals the mean c) the median equals the mean d) the variance equals the standard deviation
Ten members of a fraternity take a statistics course. Here are their scores on the first exam in the course:
Line up for a family photo, with the condition that the youngest child is in the centre, how many distinguishable arrangements are there?
How large sample should be selected in order to obtain p estimate with a bound of 0.08 on the error of estimation.
Calculate the correlation coefficient and prediction equation.
A new improved rocket launching system is being considered for short-range assault rockets. The requirement is that 80% of the rockets shall strike the target area at 800 meters. A sample of 36 experimental launches is made with 29 striking the ta..
As a quality engineer working on the Rangdo production line, you have determined that the probability of producing a defective part is 6%.
The probability that a new advertising campaign will increase sales is assessed as being 0.60. The probability that the cost of developing the new ad campaign can be kept within the original budget allocation is 0.50.
Here is a two-way table showing enrollment data for full-time undergraduate students in U.S. colleges and universities. The entries are thousands of students:
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