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- Explain probability and nonprobability samplingtechniques.The following table provides a probability distribution for the random variable x. Excel File: data05-15.xlsx f(x) 3 0.25 0.50 0.25 a. Compute E(x) , the expected value of x. b. Compute o 2, the variance of x (to 1 decimal). c. Compute o, the standard deviation of x (to 2 decimals).r.edu/courses/97574/quizzes/357143/take ch results - yaz... Question 23 Consider the following probability distribution. xi 0 M Question Mode: M... 1 2 3 O 2.5 0.9 O 1.9 P(X = xi) O 1.5 0.1 The expected value is 0.2 0.4 0.3 Question 24 An analyst has constructed the following probability distribution for firm X's predicted return for upcoming year.
- 4.94 Suppose x is a normally distributed random variable with u = 50 and o = 3. Find a value of the random variable, call it xo, such that a. P(x хо) %3 .025 с. Р(х > хо) %3.95 d. P(41 < x < xo) = .8630 e. 10% of the values of x are less than xp. f. 1% of the values of x are greater than xo.1. A person who is 55 year old bought a PHP 2,000,000 life insurance policy at a cost of PHP 1.2 M and has a probability of 0.978 of living to age 56, find the expectation of the policy. 2. nPn-r = ? (Permutations)A company has established that the relationship between the sales price for one of its products and the quanlity sokld per month is approximalely p=75-0. 1D (D is the demand or quantity sold per month and p is the price in dollars). The fixed cost is $1,000 per month and the variable cost is $30 per unit produced. a. What is the maximum profit per month for this product? b. What is the range of profitable demand during a month? a. The maximum profit per month for this product is $. (Round to the nearest dollar.) b. The range of profitable demand during a month is from units to units. (Round up the lower limit and down the upper limit to the nearest whole number.)
- Please no written by hand solution Kate recently invested in real estate with the intention of selling the property one year from today. She has modeled the returns on that investment based on three economic scenarios. She believes that if the economy stays healthy, then her investment will generate a 30 percent return. However, if the economy softens, as predicted, the return will be 10 percent, while the return will be -25 percent if the economy slips into a recession. If the probabilities of the healthy, soft, and recessionary states are 0.6, 0.2, and 0.2, respectively, then what are the expected return and the standard deviation of the return on Kate❝s investment? Calculate the coefficient of variation for this investment. (Round expected return to 3 decimal places, e.g. 0.125 and round intermediate calculations and standard deviation to 5 decimal places, e.g. 0.07680.)An investment plan allows investors to deposit a minimum of £1,000 at the beginning of the term, which pays a fixed return rate of 5% per annum. Af- ter a year, investors have to deposit a minimum of £800 with an expected return rate of 3% per annum for the second year and a standard deviation of 2% per annum. a. Find the expected value of the total minimum amount earned after two years of investment. b. Find the standard deviation of the total minimum amount earned after two years of investment.(Ch 7) Suppose a standard normal random variable has an 80 percent chance falling in an interval (–z, z). The value of z is approximately ____ (use Appendix C-1). a. 1.45 b. 1.35 c. 1.96 d. 1.28
- The proportion of vehicles which drive above the speed limit on a freeway is 85%. Suppose 100 vehicles are randomly clocked. 20 If each speeding vehicle is issued a $185 speeding ticket, the expected value of the ticket amount is $________. a $15,725 b $14,560 c $13,480 d $12,485Given that z is a standard normal random variable, compute the following probabilities. Round your answers to 4 decimal places. a. P(0 ≤ z≤ 0.63) b. P(-1.59 ≤ ≤ 0) c. P(Z > 0.30) d. P(z > -0.31) e. P(Z < 2.17) f. P(z ≤ -0.61)Probability Possible Rate of Return 0.25 -0.10 0.15 0.00 0.35 0.10 0.25 0.25 a. Under what conditions can the standard deviation be used to measure the relative risk of two investments? b. Under what conditions must the coefficient of variation (CoVar) be used to measure the relative risk of two investments?