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A medical researcher suspects that the pulse rate of smokers is higher than the pulse of non smokers. Use the sample statistics below to test the researchers suspicion. State your hypothesis, draw your curve, label your critical values and your test statistic, state your decision to accept or reject. Write your conclusion in the language of the problem. Use a=.05
Smokers Nonsmokers
N1=100 N2=100
mean=88 Meab=85
s1=4.8 s2=5.3
The following ANOVA summary data are the result of a regression with sales per year (dependent variable) as a function of promotion expenditures per year (independent variable) for a toy company.
Can you envision circumstances under which these outcomes would not be normally distributed? Provide three distinct examples of the business outcomes that are not normally distributed.
Define the variable - the weight in pounds - it is a dependent variable. Find the mean, median, mode, variance, and standard deviation for your data.
A local university administers a comprehensive examination to the recipients of a B.S. degree in Business Administration. A sample of 5 examinations are selected at random and scored. The test scores are 56, 85, 65, 86, and 93. At 98% confidence, ..
if one of the pedestrians death is randomly selected what is the probability that it involves an intoxicated pedestrian and an intoxicated driver?
According to the survey, 37% of the adults are concerned that employers are monitoring phone calls. Use the binomial distribution formula to calculate the probability that:
The management of a department store is interested in estimating the difference between the mean credit purchases of customers using the store's credit card versus those customers using a national major credit card.
Statistical aptitude scores are known to be normally distributed, with mean = 50. A researcher has designed a new program intended to improve students statistical aptitude, and has enrolled a sample of 30 students in it.
Pollsters try to determine whether or not a person is a "likely voter" before they count their opinion in a poll. If we assume 40% of the registered voters will actually vote, in a random sample of 100 registered voters we can be 95% confident tha..
What is statistical power? How does a researcher decide whether to use a one-tailed or two-tailed test? What are the advantages and disadvantages of using a two-tailed test?
A sample of 100 observations has a mean of 2.99 and a standard deviation s equal to 0.5 Conduct the following test of hypotheses about the corresponding population mean at a level of significance of α = 0.2
If they must form an ethics subcommittee of 4 members, how many different subcommittees are possible?
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