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Peter, Paul, Mary, John and Martha are members of the pastoral council at a local church. They are to be seated at one side of a long conference table in a pastoral council meeting.
a) How many possible ways can these 5 council members be seated?
b) How many possible sitting arrangements are there if only gender is considered in the process?
a store wishes to predict net profit as a function of sales for the next year. the following table gives the years 1998
For these data, a 99% confidence interval for true mean weight loss by all patients attending the clinic would have the limits (?, ?).
The serum cholesterol levels for men in one age group are normally distributed with a mean of 185.1 and a standard deviation of 37.8. All units are in mg/100 ml. Find the two levels that separate the top 8% and the bottom 8% of this population.
The chart at the right. Does this sample indicate that songs classified as dance music have lower beats per minute than the songs ranked on a Top 200 list?
How do you find the z-score corresponding to a score of X = 100 for the distributions given below? How do you know what direction they are going?
The Gallup Poll has decided to increase the size of its random sample of Canadian voters from about 1500 people to 4000 people. The effect of this increase is: increase the standard error of the estimate.
The cholesterol levels of a population have a normal distribution with a mean of 160 and a standard deviation of 30 how you I find the percentage of the population with cholesterol levels above 200.
How long do new batteries last on a camping trip? A random sample of n1 = 42 small camp flashlights were installed with brand I batteries and left on until the batteries failed.
Find the p-value and interpret it. (f ) If statistically significant, do you think the difference is large enough to be important? If so, to whom, and why? (g) Is the normality assumption fulfilled? Explain.
The company statistician has reported the mean number of man-hours lost per month but did not keep a record of the total sum. Should the manager order the study repeated to obtain the desired information? Explain your answer clearly.
Compute the test statistic. Use the t distribution table to compute a range for the p value. What is the rejection rule using the critical value? What is the conclusion?
a group of voters consists of 40 democrats 30 republicans and 20 independents. a sample of 12 voters is chosen at
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