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Indicate which of the following situations involve descriptive statistics and which involve inferential statistics:a. An annual stockholders' report details the assets of the corporation.
b. A history instructor tells his class the number of students who received an A on a recent exam.
c. The mean of a sample set of scores is calculated to characterize the sample.
d. The sample data from a poll are used to estimate the opinion of the population.
e. A correlational study is conducted on a sample to determine whether educational level and income in the population are related. lected on all federal employees.
The following data show the advertising expenses (expressed as a percentage of total expenses) and the net operating profits (expressed as a percentage of total sales) in a random sample of six drugstores:
Based on the Nielsen ratings, the local CBS affiliate claims its 11 p.m. newscast reaches 41% of the viewing audience in the area. In a survey of 100 viewers, 36% indicated that they watch the late evening news on this local CBS station. What is t..
You find that a random sample of five microwave ovens has a mean repair cost of $75 and a standard deviation of $12.50. At α = 0.01, do you have enough evidence to support the repairer's claim?
A bottling company fills bottles with a mean of 500 mL of liquid, with a standard deviation of 2 mL. Quality control randomly samples 20 bottles at a time. Consider the mean volume of liquid in the sample bottles. What is the mean of the sampling ..
find the following percentiles for the standard normal distribution. interpolate where appropriate. round your answers
through the 2012-2013 season lionel messi has scored 215 goals in 246 games played for barcelona for a lifetime 0.86
What will be the standard deviation and the varience in each of the following casses
A company is producing cylindrical blocks for a children's toy. The average diameter of a block is 3.5 inches. Sixteen blocks are inspected and the diameters are measured.
Replace (or exchange) 10% of its model I and 18% of its model II. If a model is selected at random, find the probability that it will be defective.
Assume that your county's population is similar to the American population in age distribution. What are the mean and standard deviation of the proportion P^ who are at least 75 years of age in samples of 150 respondents?
in the following problem check that it is appropriate to use the normal approximation to the binomial. then use the
Suppose X1, X2,...Xn is a sequence of IID positive random variables.- find the distribution to which it converges.
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