Question

of contldence, the 00 of the 200 UCLA university professors oppose the US policies in Middle East. Using the 0.95 degree interval estimates for the population proportion is a, 50% to 57%. 45% to 55% d. none of the above. A Rutgers University professor claims that there is no significant difference between proportion of female (1) and male collects data students (m) of the university who exercise at least 15 minutes a day. What would be a proper conclusion if he conducts hypothesis test, and finds za 3.42. Use a-25. a. Reject HO. There is a significant difference. b. Reject HO. There is no significant difference c. Fail to reject HO. There is a significant difference. d. Fail to reject HO. There is no significant difference. Suppose a company is planning to produce an entirely new product. A marketing executive predicts that "the probability that the company will earn a profit from the product is less than o.50." What concept of probability does this illustrate? a. relative frequency concept of probability b. subjective concept of probability c. classical concept of probability d. none of the above You have used the significant level of 0.01 to estimate the average hours of television viewing for the NJ students. What is the chance that our interval estimate does not contain the true population mean? a, 99% b.10% c.100% d. 196 e. None of the above The New Jersey Renewable Energy Incentive Program provides incentives for the use of photovoltaics, solar hot water, and other renewable energy sources. During the last few years it was assumed that approximately 20% of families in Nare interested in the program. However, it is now suspected that this figure has increased. To test this, a random sample of 1200 What are the null and alternative family is selected, and it is found that 360 of them are interested in the program. hypotheses that should be used? HO: p 360; Ha: p >360 a. b. H0: p : 30%; Ha: p < 30% H0: p-20%; Ha: p > 20% d, c. H0: p > 30%; Ha: p-30% H0: p-30%; Ha: p > 30% e. Saba takes a simple random sample of 15 from one-tail test for the mean, so symmetrical. She is justified in using a very large population whose variance is unknown. She intends to perform a draws a boxplot of the sample values and finds that distribution of the sample values is roughly a. t-test because the sample is small b. t-test because the sample is normally distributed c. t-test because the population standard deviation is unknown d. z-test because the sample is normally distributed, and population is very large students of Rutgers. A random sample of male and female students will be taken, and each student will be asked whether she/he supports the green party, the democrats, the republicans, or some other party. Of the following, which would be th A polling organization wishes to find out whether there is a difference in political preference between the male and female most appropriate significance test to analyze the results of the study, assuming 1% level of significance? a. One-sample z-test of proportion b. Two-samples z-test for the difference of two means c. Two-samples t-test for the difference of two means Chi-square test of independence Chi-square test of goodness of fit None of the above d. e. .

Answer 1