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1. Wine Spectator rates wines on a point scale of 0 to 100. It can be inferred from the many ratings in this magazine that the average rating is 87 and the standard deviation is 3 points. Wine ratings seem to follow a normal distribution. In the May 15, 2007, issue of the magazine, the burgudy Domaine des Perdrix received a rating of 89.2 What is the probability that a randomly chosen wine will score this high or higher?
2. 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 must be speci?ed for each of the three categories.
How much does a typical employee and his or her family spend per year on dental expenses? Construct a 95 percent confidence interval for the population mean. Interpret the interval.
the poisson distribution can be a reasonable approximation of the binomial distribution. explain why this maymay not be
an agricultural researcher plants 100 plots with a new variety of yellow corn. assume that the yield per acre for the
Develop a linear regression model for these data and forecast carpet sales if 30 construction permits for new homes are filed.
The trial failed to show significance. How many subjects would be required to detect the difference in proportions observed in the trial with 80% power?
Mean threshold values and standard deviations for the three groups are given below. Normal probability plots showed the three populations were well approximated by the Normal distribution.
1 personal best finishing times for a particular race in high school track meets are normally distributed with mean
A standard deviation of 1.5. The distribution is normal. What proportion of faculty consume an amount between 4 & 6 cups?
suppose bolts are being manufactured using a process so that it is known that the length of the bolts follows a normal
Compute the three statistics that measure central location - Briefly describe what each statistic tells you and compute the mean and median of the rates of return.
Find a 90% confidence interval for the proportion of Americans who would agree with this. Interpret your interval in this context. Explain what "90% confidence" means.
The average public elementary school has 450 students. assume the stand deviation of the distribution is 99. if a random sample of 36 public elementary schools is selected, find the probability that the number of students enrolled is between 445 a..
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