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For each of the following sets of data (represented by the mean and standard deviation below), identify the end-points for six standard deviation units (that is between +/- 3SD around the mean). Additionally, calculate the range from "mean-3SD" to "mean+3SD"). Draw frequency polygons for each of the four distributions (assume they are normal) with the raw scores indicated for all six of the standard deviation units.
a) Mean= 15 SD= 3 b) Mean= 1,000 SD= 250 c) Mean= 75 SD= 5 d) Mean= 150 SD= 15
How many bit strings of length n are palindromes? Hint: Consider two cases n is even and n is odd. Note a palindrome is a "string" of letters or numbers which read the same frontwards and backwards.
a ski-lift that runs to the top of a hill has a rise to run ration of 1/2. the horizontal distance from the bottom of the lift to the center of the mountain is 5000ft. how high is the hill?
a plane flies 400 miles with the wind and 320 miles against the wind in the same length of time. If the speed of the wind is 29 mph, what is the speed of the plane in still air?
Let X be uniform on the set {1/2,1/3,1/4}, and let the distribution of Y |X = x be geometric with parameter x; that is, P(Y = k|X = x) = (1 - x)kx, for k = 0,1,2,..
a sum of money is shared among 3 brothers the eldest received 7/13, and the next received 2/3 of the remainder. If the youngest brother received $6 . Find the sum of the money shared.
a company's total cost in millions of dollars,is given by c(t)=280-30e^-t where t= time in years, find the marginal cost when t=3
Andrew buys a house for $65,000, and the value of the house increases at a rate of 2% per year. How much will the house be worth in 8 years? Round to the nearest dollar.
a random sample of 450 students from a wide geographic area indicated that 55 attended private schools. Estimate the true population of students attending private schools with 90% ci.
Let P : C -> R be defined by P(z) = Re z; show that P is an open map but it is not a closed map. ( Hint: Consider the set F = { z : Imz = ( Re z)^-1 and Re z doesn't equal to 0}.) Please explain every step and justify.
Alexamara Marina Group Database: Problem 4 (p. 160): List the first and last names of all owners who have a boat in a 40-foot slip. Use the IN operator in your formulation.
The actual demand of a product in period 1 through 3 are 285, 229, 309 units, respectively. Find the forecast of demand in period 4 using the exponential smoothing model with a smoothing constant of 0.41. The forecast demand for period 1 was 302 u..
after darlene bowled 2 more games her mean score for all 6 games was 135. what could her scores for each of those 2 games have been?
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