alley 05TFS072105 Monthly Mortgage Payments The average monthly mortgage payment including principal and interest is $982 in the United States. If the standard deviation is approximately $180 and the mortgage payments are approximately normally distributed, find the probabilities. Use a TI-83 Plus/TI-84 Plus calculator and round the answers to at least four decimal places. Part: 0 / 2 Part 1 of 2 (a) The selected monthly payment is more than $1450. P(X>1450)=

Electricity bills: According to a government energy agency, the mean monthly household electricity bill in the United States in  2011  was  $108.87 . Assume the amounts are normally distributed with standard deviation  $18.00 . Use Excel to answer the following. Round the answer to four decimal places. Part: 0 / 3 0 of 3 Parts Complete   Part 1 of 3     (a) What proportion of bills are greater than  $134 ? The proportion of bills that are greater than  $134  is    .       Part: 1 / 3 1 of 3 Parts Complete   Part 2 of 3     (b) What proportion of bills are between  $83  and  $145 ? The proportion of bills that are between  $83  and  $145  is    .       Part: 2 / 3 2 of 3 Parts Complete   Part 3 of 3     (c) What is the probability that a randomly selected household had a monthly bill less than  $118 ? The probability that a randomly selected household had a monthly bill less…

Electricity bills: According to a government energy agency, the mean monthly household electricity bill in the United States in  2011  was  $109.77 . Assume the amounts are normally distributed with standard deviation  $22.00 . Use Excel to answer the following. Round the answer to four decimal places. Part: 0 / 3 0 of 3 Parts Complete   Part 1 of 3     (a) What proportion of bills are greater than  $137 ? The proportion of bills that are greater than  $137  is.

Empirical research on stock market data indicates that over the course of a year, 60% of stocks go up. A random sample of 600 stocks is going to be chosen at the beginning of next year. Let p be the proportion of the stocks in the sample that go up over the course of a year. Answer the following. (If necessary, consult a list of formulas.) (a) Find the mean of p. 0 (b) Find the standard deviation of p. 0 (c) Compute an approximation for P(p>0.64), which is the probability that more than 64% of the stocks in the sample go up over the course of the year. Round your answer to four decimal places. X 5

Need help solving Part C and Part E please label each.

IQ tests supposedly measure our intelligence. They typically are ‘normed’ so that they have a mean of 100 and a standard deviation of 15. (Higher scores show higher intelligence.) Use the graph and use the z-score and percents from columns b and c in Table A, when relevant. If you scored 132, what is your z-score? (Interpret.) Use table A  X, z(a), (b), and (c) X z (a) (b) (c)          and use the graph! Write down or save your response to use in Part 2 of this quiz. Group of answer choices -2.53 z. I'm at the 98.34 percentile rank and 1.66% of people scored smarter than me. 2.13 z. I'm at the 98.34 percentile rank and 1.66% of people scored smarter than me. -2.13 z. I'm at the 1.66 percentile rank and 98.34% of people scored smarter than me. 2.53 z. I'm at the 0.57 percentile rank and 99.43% of people scored smarter than me. 2.13 z. I'm at the 1.66 percentile rank and 98.34% of people scored smarter than me. 2.53 z. I'm at the 99.43 percentile rank…