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- Three randomly selected households are surveyed. The numbers of people in the households are 2, 6, and 7. Assume that samples of size n = 2 are randomly selected with replacement from the population of 2, 6, and 7. Listed below are the nine different samples. Complete parts (a) through (c). 2,2 2,6 2,7 6,2 6,6 6,7 7,2 7,6 7,7 O a. Find the variance of each of the nine samples, then summarize the sampling distribution of the variances in the format of a table representing the probability distribution of the distinct variance values. Probability (Type an integer or a fraction. Use ascending order of the sample variances.) b. Compare the population variance to the mean of the sample variances. Choose the correct answer below. O A. The population variance is equal to the mean of the sample variances. O B. The population variance is equal to the square of the mean of the sample variances. O C. The population variance is equal to the square root of the mean of the sample variances. c. Do the…20 computer screens were randomly selected from a large collection of computer screens in a company’s warehouse. These 20 computer screens are referred to as the: test statistic. parameter. population. sample.Three randomly selected households are surveyed. The numbers of people in the households are 3, 5, and 10. Assume that samples of size n=2 are randomly selected with replacement from the population of 3, 5, and 10. Listed below are the nine different samples. Complete parts (a) through (c) 3,3 3,5 3,10 5,3 5,5 5,10 10,3 10,5 10,10 A. Find the variance of each of the nine samples, then summarize the sampling distribution of the variances in the format of a table representing the probability distribution of the distinct variance values. s2 Probability B. Compare the population variance to the mean of the sample variances. C. Do the sample variances target the value of the population variance? In general, do sample variances make good estimators of population variances? Why or why not?
- a-dThe gasoline price often varies a great deal across different regions across country X. The followingdata show the price per gallon for regular gasoline for a random sample of gasoline service station forthree major brands of gasoline (A, B and C) located in 10 metropolitan areas across the country X.A B C3.77 3.83 3.783.72 3.83 3.873.87 3.85 3.893.76 3.77 3.793.83 3.84 3.873.85 3.84 3.873.93 4.04 3.993.79 3.78 3.793.78 3.84 3.793.81 3.84 3.86a. State the null and alternative hypothesis for single factor ANOVA to test for any significantdifference in the mean price of gasoline for the three brands.b. State the decision rule at 5% significance level. c. Calculate the test statistic. d. Based on the calculated test statistics decide whether any significant difference in the mean price of gasoline for three bands. i need to be done the d subpartA gym manager is interested in whether the ‘beginner’ and ‘expert’ climbing walls (that were of the same height) at her facility are actually different from each other. To test this, she decides to look at the time it takes people to reach the top of both walls. She recruits 25 students and has them each climb both walls and looks for differences between the ‘beginner’ wall climbing times and the ‘expert’ wall climbing times. Select one: a. single sample t-test b. one-way ANOVA c. paired samples t-test d. z-test e. factorial ANOVA f. t-test independent means
- We take a simple random sample (SRS) from a population to study the effect of marital status (married vs. not married on systolic blood pressure. Which t procedure should we use? A. a one-sample t procedureB. a paired t procedureC. ANOVAD. Noe of the aboveAs part of a college literature course, students must select three classic works of literature from the provided list and complete critical book reviews for each selected work. Write a short descripti the processes that can be used to generate a simple random sample of three books. Obtain a simple random sample of size 3 from this list. Click the icon to view the classic works list. Which of the following would produce a simple random sample? Select all that apply. A. List the names in alphabetical order and take the first three on the list. B. Number the books from 1 to 9 and use a random number table to produce 3 different one digit numbers corresponding to the books selected. C. List each book on a separate piece of paper, place them all in a hat, and pick three. D. Ask someone their opinion on which three books are best, and select those three. Use the portion of the random number table provided below to obtain a simple random sample of size 3 from this list. If you start on the…Three randomly selected households are surveyed. The numbers of people in the households are 4, 5, and 9. Assume that samples of size n=2 are randomly selected with replacement from the population of 4, 5, and 9. Listed below are the nine different samples. Complete parts (a) through (c). 4,4 4,5 4,9 5,4 5,5 5,9 9,4 9,5 9,9 a. Find the variance of each of the nine samples, then summarize the sampling distribution of the variances in the format of a table representing the probability distribution of the distinct variance values. s2 Probability ▼ 0 0.3 1 ? ▼ 1 0.5 4 ? ▼ 18 4 8 ? ▼ 12.5 6.3 25 ? (Type an integer or a fraction. Use ascending order of the sample variances.)
- .Pick the Test (Z-test, Single Sample T-test, Independent Sample T-test, Paired Sample Ttest, ANOVA): Suppose that two brands of gasoline were being compared for mileage. Samples of each brand were used in identical cars under identical conditions. Nine tests were made of Brand I and six tests of Brand II. Are the two brands significantly different? Test:Magnetic surveying is one technique used by archaeologists to determine anomalies arising from variations in magnetic susceptibility. Unusual changes in magnetic susceptibility might (or might not) indicate an important archaeological discovery. Let x be a random variable that represents a magnetic susceptibility (MS) reading for a randomly chosen site at an archaeological research location. A random sample of 120 sites gave the readings shown in the table below. Magnetic Susceptibility Readings, -6 centimeter-gram-second x 10 Magnetic (cmg x 10-6) Number of Estimated Susceptibility 0 5 and nq > 5 are both satisfied. Yes, it is appropriate since n 2 30. O Yes, it is appropriate since the criterian > 100 and np 5 and nq > 5 are not satisfied.Three randomly selected households are surveyed. The numbers of people in the households are 1,2 and 12. assume that sample of size n=2 are randomly selected with replacement from the population of 1,2, and 12. nine different samples: 1,1, 1,2 1,12, 2,1 2,2 2,12 12,1 12,2 12,12 Find the variance of each of the nine samples, then summarize the sampling distribution of the variances in the format of a table representing the probability distribution of the distinct variance values.