Personal incomes in a city have an average of $80,000 and standard deviation of Questions 15–17....
The average annual precipitation for a large midwest city is 30.85 inches with a standard deviation of 3.6 inches. Assume the variable is normally distributed. Find the probability that the mean of a random sample of 32 months will have a mean less than 30 inches. Find less than 30 inches the probability that the mean of a random sample of 32 months will have a mean An insurance company says that 15% of all fires are caused a) Find...
The annual incomes for a random sample of 16 engineers working in Dubai have a standard deviation of $14,900. The annual incomes for a random sample of 17 engineers working in Abu Dhabi have a standard deviation of $9600. Using this information, can you conclude that the standard deviation of the annual incomes for engineers is greater in Dubai than in Abu Dhabi? Use = 0:05: a. Identify the claim and state H0 and Ha: b. Find the critical value...
15 16 17 The graph below approximates the rate of change of the price of tomatoes over a 60-month period, where p(t) is the price of a pound of tomatoes and t is time (in months). 18 19 20 21 0.07 0.05 p'(t) 0 0.09 0.06 22 23 24 25 26 15 0.04 30 -0.02 0.03 45 0 p't) Idollars per month) 0.02 27 50 0.06 0.01 0 0 10 30 50 60 70 -0.01 -0.02 -0.03 28 29 30...
9.14 The average credit card debt is currently averaging $15,000 (15) with a standard deviation of 5,000 (5). What is the probability that (use single digits): a. Mrs. Yono will have a debt of more than 9 thousand dollars? b.Mr. Lopez will have a debt more than 8 thousand? c. A sample of 20 people will have a debt less than 12 thousand? d. A sample of 20 people will have a debt between 14 and 16 thousand? 9.14 The...
2. After conducting a census in 1970, the family incomes in a certain city were found to have a mean of $14,200 with a standard deviation of $2600. A random sample of 75 families taken in 1975 produced x¯ = $14, 930 (in 1970 dollars, after adjusting for inflation). Assume throughout this problem that the standard deviation of family incomes is the same in 1975 as it was in 1970. a) Identify each of the numbers $14200, $2600, and $14930...
17 and 18 please. Thank you. gleater than 700 pounds? DIe 81 31 female giraffes are chosen. The mean height is found to be 15 feet. Assume that the population standard deviation for the height of female giraffes is。 5 feet. Calculate the 85% confidence interval of for population mean height of female giraffes. 16) A sample of 21 male giraffes are chosen. The mean height is found to be 17.5 feet. The standard deviation of the sample is found...
xyz stock has an average annual return of 15% with an annual return standard deviation of 50%. what loss level can we expect over a two-year investment horizon with a probability of 17%? A) -35.00% B) -28.12% C) -25.05% D) -40.71%
Questions 15–17. A newspaper reported that 90% of youths use the Internet. Use this reported number as the population proportion. A random sample of 900 youth is selected. Let p be the sample proportion of youths who use the Internet. 15. The distribution of p is closest to ✓(a) normal with mean 0.9 and standard deviation 0.01 (b) normal with mean 0.9 and standard deviation 0.3 (c) binomial with mean 0.9 and standard deviation 0.01 (d) binomial with mean 0.9...
could you solve these 4 questions. Thank you Marks for this submission: 1.00/1.00 The national average SAT score (for Verbal and Math) is 1028 with a standard deviation of 92. What is the probability that a randomly selected score exceeds 1200? ete o 1.00 Select one: estion a. 0.41 b. 0.88 c. 0.59 d. 0.12 e. Cannot be determined Check In the university library elevator there is a sign indicating a 16-person limit as well as a weight limit of...
QUESTION 15 Let X be a nonnegative random variable (the possible values of X are all nonnegative numbers), and suppose E( X ) = 1, then, the probability that X takes a value greater than 5, cannot be A. larger than 0.1. B. larger than 0.2. C. less than 0.2. D. none of the above. QUESTION 16 Let X be any random variable, and E( X ) = 2, then, the probability that X takes a value greater than 10, cannot...