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Identifying H0and Hr in ex 5-12 , examine the given statement , then express the null hypothesis H0 and alternative hypothesis H1 in symbolic form.
1. The mean IQ of statistics students is at least 110.
2. The percentage of men who watch golf on tv is not 70%, as is claimed by the Madison Advertising Company.
Finding Critical Values. In Exercises 13-20 , find the critical z values. In each case ,assume that the normal distribution applies.
3. Two-tailed test: alpha = 0.01
4. Left-tailed test; alpha=0.05
Given that the price-to-earnings ratios are uniformly distributed, answer the following questions. What percent of price-to-earnings ratios are between 1.90 and 2.48?
Exam is given to 20 randomly chosen students and their average length of t time needed to finish exam was 54 minutes with standard deviation of 5.99 minutes. Test instructor's claim at the 0.05 level of significance.
The mean number of passengers per flight is 160 with a standard deviation of 20. The aircraft used for the route has 200 seats.
Based on a scatter diagram, would you estimate the linear correlation coefficient to be:
A random sample of 500 participants was recruited for the study ? Subjects were allowed to elect to participate in an 3-month exercise program or serve as a control subject (190 chose the program, 310 chose to serve as controls)?
According to table, which presents a MODI solution for a transportation problem, if that solution is used, which of the following is true.
What is the probability that a randomly selected mango weighs less than 14 ounces?
What conclusions can you draw about the nature of the relationship between anxiety and exam performance?
A recent Survey indicated that 18% of America adults were in favor of cloning human embryos. What is the probability that in a group of 30 adult Americans
To get the best deal for CD player, Jessica called eight appliance stores and asked the cast of a specific model. The prices she quoted are listed below. Show all work. Compute the standard deviation.
The following table is from the Social Security Actuarial Tables. For each age, it gives the probability of death within one year, the number of living out of an original 100,000 and the additional life expectancy for a person of that age.
Compare your best difference to the result from an ordinary two-sample t-test between these groups. Comment the difference.
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