If numerous samples of N = 15 are taken from a uniform distribution and a

relative frequency distribution of the means is drawn, what would be the shape of

the frequency distribution?

8. A normal distribution has a mean of 20 and a standard deviation of 10. Two

scores are sampled randomly from the distribution and the second score is

subtracted from the first. What is the probability that the difference score will be

greater than 5? Hint: Read the Variance Sum Law section of Chapter 3.

9. What is the shape of the sampling distribution of r? In what way does the shape

depend on the size of the population correlation?

10. If you sample one number from a standard normal distribution, what is the

probability it will be 0.5?

11. A variable is normally distributed with a mean of 120 and a standard deviation

of 5. Four scores are randomly sampled. What is the probability that the mean

of the four scores is above 127?

12. The correlation between self-esteem and extraversion is .30. A sample of 84 is

taken. a. What is the probability that the correlation will be less than 0.10? b.

What is the probability that the correlation will be greater than 0.25?

13. The mean GPA for students in School A is 3.0; the mean GPA for students in

School B is 2.8. The standard deviation in both schools is 0.25. The GPAs of

both schools are normally distributed. If 9 students are randomly sampled from

each school, what is the probability that:

a. the sample mean for School A will exceed that of School B by 0.5 or more?

b. the sample mean for School B will be greater than the sample mean for

School A?

14. In a city, 70% of the people prefer Candidate A. Suppose 30 people from this

city were sampled.

a. What is the mean of the sampling distribution of p?

b. What is the standard error of p?

8. You know the minimum, the maximum, and the 25th, 50th, and 75th percentiles

of a distribution. Which of the following measures of central tendency or

variability can you determine?

mean, median, mode, trimean, geometric mean, range, interquartile range,

variance, standard deviation

9. For the numbers 1, 3, 4, 6, and 12:

Find the value (v) for which ?(X-v)2 is minimized.

Find the value (v) for which ?|x-v| is minimized.

10. Your younger brother comes home one day after taking a science test. He says

that some- one at school told him that "60% of the students in the class scored

above the median test grade." What is wrong with this statement? What if he had

said "60% of the students scored below the mean?

the probability that neither will be alive in 20 years . 43. In a high school graduating class of 100 students, 42 studied mathematics. 68 studied psychology, 54 studied history, 22 studied both mathematics and history, 25 studied both mathematics and psychology, 7 studied history and neither mathematics nor psychology, 10 studied all three subjects, and 8 did not take any of the three subjects. If a student is selected at random, find (a) The probability that he takes history and psychology but not mathematics. (b) The probability that if he is enrolled in history, he takes all three subjects. (c) The probability that he takes mathematics only. is 0.4 and thehelp againi please due in 20 mins At a certain college, 82% of all students take Statistics, and 619% of all students take Economics. 559% of all students take both Statistics and Economics. P(9) = P(E) = Select an answer PIS or B) PIS and B) P(B) PIS] = 0.55 To decide, we have to calculate Select an answer P(B) PIS] P(S or B) P(S and E) which in this problem is equal to . We conclude that $ and E are Select an answer mutually exclusive not mutually exclusive , because Select an answer PIS and E) is equal to 0 PIS and E] is not equal to 0 P(S or E) is not equal to 0 P(S or E) is equal to 1. Let S be the event that a student takes Statistics. Let E be the event that a student takes Economics. Summarize in symbols the probabilities described above. 2. Find the probability that a randomly selected student does not take Statistics. 3. Find the probability that a randomly selected student does not take Economics 4. Find the probability that a randomly selected student takes Statistics or Economics. 5. Determine if the events, taking Statistics and taking Economics, are mutually exclusive. Explain.home / study / business / business statistics / business statistics solutions manuals / macroeconomics / 13th edition Macroeconomics | (13th Edition) See this solution in the app E Chapter 17, Problem 2TY Bookmark Show all steps: ON Problem Long-term government bonds now pay approximately 3 percent nominal interest. Would you prefer to trade yours in for an indexed bond that paid a 1 percent real rate of interest? What if the real interest rate offered were zeroed? What if it were negative 1 percent? What do your answers to these questions reveal about your personal beliefs about future inflation? Step-by-step solution There is no solution to this problem yet. Get help from a Chegg subject expert.tudy / business / business statistics / business statistics solutions manuals / introduction to agricultural economics / 7the oduction to Agricultural Economics | (7th Ed this solution in the app Chapter 4, Problem 18TEQ Bookmark Show all steps: ON Problem Consider the diagram to the right. At point C, which of the following statement(s) is (are) true? a. The optimal purchase for this consumer is 8 glasses of Kool-Aid and 6 glasses of tea. b. The marginal rate of substitution is -3/4. MUK-Aid _MU,. C. Pier PKod-Aid d. All of the above. Kool-Aid 12 16 Tea Step-by-step solution