Question 241pts For a one-tailed test (lower tail) with a sample…

QuestionQuestion 241pts For a one-tailed test (lower tail) with a sample…Question 241 pts For a one-tailed test (lower tail) with a sample size of 10 and a .10 level of significance, the t value is _____.Group of answer choices1.383 -1.372 -1.383 -2.821  Flag question: Question 25Question 251 pts For a two-tailed test with a sample size of 20 and a .20 level of significance, the t value is _____.Group of answer choices1.328 2.539 1.325 2.528  Flag question: Question 26Question 261 pts In the hypothesis testing procedure, α is _____.Group of answer choicesthe level of significance the critical value the confidence level 1 − level of significance  Flag question: Question 27Question 271 pts In hypothesis testing if the null hypothesis is rejected, _____.Group of answer choicesno conclusions can be drawn from the test the alternative hypothesis must also be rejected the data must have been collected incorrectly the evidence supports the alternative hypothesis  Flag question: Question 28Question 281 pts For a two-tailed hypothesis test about a population mean, the null hypothesis can be rejected if the confidence interval _____.Group of answer choicesis symmetric is non-symmetric includes µ0 does not include µ0  Flag question: Question 29Question 291 pts Exhibit 9-5   n = 16 H0: μ ≥ 80   = 75.607 Ha: μ < 80  σ = 8.246  Assume the population is normally distributed. Refer to Exhibit 9-5. The p-value is equal to _____.Group of answer choices-.0166 .0166 .0332 .9834     Flag question: Question 31Question 311 pts When using Excel to calculate a p-value for a lower-tail hypothesis test, which of the following must be used?Group of answer choicesRAND 1 − NORM.S.DIST NORM.S.DIST COUNTIF  Flag question: Question 32Question 321 pts In hypothesis testing, the critical value is _____.Group of answer choicesa number that establishes the boundary of the rejection region the probability of a Type I error the probability of a Type II error the same as the p-value  Flag question: Question 33Question 331 pts A two-tailed test is performed at a 5% level of significance. The p-value is determined to be .09. The null hypothesis _____.Group of answer choicesmust be rejected should not be rejected may or may not be rejected, depending on the sample size has been designed incorrectly  Flag question: Question 34Question 341 pts A soft drink dispenser can be adjusted to deliver any fixed number of ounces of soft drink. If the machine is operating with a standard deviation in delivery equal to 0.3 ounces, what should be the mean setting so that a 12-ounce cup will overflow less then 1% of the time? Assume a normal distribution for ounces delivered. Group of answer choices12.70 ounces 12.77 ounces 11.37 ounces 11.70 ounces None of these is correct.  Flag question: Question 35Question 351 pts The principal randomly selected six students to take an aptitude test. Their scores were: 78.2, 81.3, 86.1, 84.2, 72.8, 85.2 Determine a 90 percent confidence interval for the mean score for all students.Group of answer choices77.13 < µ < 85.47 77.03 < µ < 85.57 75.98 < µ < 86.62 72.95 < µ < 89.65  Flag question: Question 36Question 361 pts A survey is conducted to determine the percentage of students at state universities who change their major at least once. In ans SRS of 100 students 78% indicated that they graduated with a major different from the one with which they entered college. Determine a 95% confidence interval for the percentage of students who change their major.Group of answer choices69.9% to 86.1% 68.2% to 87.8% 68.5% to 87.5% 71.2% to 84.8% None of these is correct.  Flag question: Question 37Question 371 pts To determine the mean cost of groceries in a certain city, an identical grocery basket of food is purchased at each store in a random sample of ten stores. If the average cost is $47.52 with a standard deviation of $1.59, find a 99% confidence interval estimate for the cost of these groceries in the city.Group of answer choices$47.52 ± $1.30 $47.52 ± $0.45 $47.52 ± $1.39 $47.52 ± $1.17  Flag question: Question 38Question 381 pts Researchers claim that 60 tissues is the average number of tissues a person uses during the course of a cold. The company who makes Kleenex brand tissues thinks that fewer of the tissues are needed. What are their null and alternative hypotheses? Group of answer choices : = 60 : < 60  : = 60 : > 60  : ̅= 60 : ̅< 60  : < 60 : = 60 None of these is correct.  Flag question: Question 39Question 391 pts The owner of a local nightclub has recently surveyed a random sample of n = 300 customers of the club. She would now like to determine whether or not the mean age of her customers is over 35. If so, she plans to alter the entertainment to appeal to an older crowd. If not, no entertainment changes will be made. Suppose she found that the sample mean was 35.5 year and population standard deviation was 5 years. What is the p-value associated with the test statistic?Group of answer choices0.0416 0.9572 0.0836 0.4602  Flag question: Question 40Question 401 pts  Both over-the-counter niacin and the prescription drug Lipitor are known to lower blood cholesterol levels. In one double-blind study Lipitor outperformed niacin. The 95% confidence interval estimate of the difference in mean cholesterol level lowering was (18, 41). Which of the following is a reasonable conclusion?Group of answer choicesWe should be 95% confident that Lipitor will outperform niacin as a cholesterol-lowering drug. There is a .95 probability that Lipitor will outperform niacin by at least 23 points in lowering the cholesterol level of any given individual. There is a .95 probability that Lipitor will outperform niacin in lowering the cholesterol level of any given individual. Niacin lowers cholesterol an average of 18 points, while Lipitor lowers cholesterol an average of 41 points. None of these is correct.  MathStatistics and ProbabilityDSI LYTCShare Question