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When the x's are equally spaced, the calculation of and can be simplified by coding the x's by assigning them the values ... , -3, -2, -1, 0, 1, 2, 3, ... when n is odd, or the values ... , -5, -3, -1, 1, 3, 5, ... when n is even. Show that with this coding the formulas for and become
Assume that the population proportions are to be estimated from the samples described. Find the margin of error and the 95% confidence interval.
At a fair run by a local charity organization, it costs 50 cents to try one's luck in drawing an ace from a deck of 52 playing cards. What is the expected profit per customer
classify the following random variables as discrete or continuousx the number of automobile accidents per year in
A state meat inspector in Iowa has been given the assignment of estimating the mean net weight of packages of ground chuck labeled “3 pounds.” Of course, he realizes that the weights cannot be precisely 3 pounds. A sample of 36 packages reveals the m..
What is the mean of the sample proportion of pieces of unread mail? What is the standard error of the sample proportion?
Assume you choose 20 houses at random. On average, how many houses of twenty would you expect to have DVD? Determine standard deviation of number of houses with DVD?
how important they felt level of risk was in choosing a retirement investment
If np ≥ 5 and nq ≥ 5, estimate P (more than 5) with n=14 and p=0.3 by using the normal distribution as an approximation to the binomial distribution; if np
Find t (subscript alpha/2) for a confidence interval with 90% confidence and compute and interpret the margin of error "E" for a confidence interval with 90% confidence.
Your task is to predict the output variable "choice" based on 16 input features: x1, x2, ....,x15, x16.The output "choice" is a categorical variable that can take 5 possible values: "M", "B", "J", P", and "O".The first 8 input features (x1, x2, ....,..
Statistics students were asked to fill one-cup measuring cups from boxes of Kellogg's Raisin Bran cereal, and then to count the number of raisins in the one-cup serving. The results, from 13 students, were sampled and are shown here. 23, 33, 44, 3..
Descriptive statistics for each of the four variables along with a discussion of what the descriptive statistics tell us about the motion picture industry?
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