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Suppose that a recent poll found that 40?% of adults in a certain country believe that the overall state of moral values is poor. If a survey of a random sample of 45 adults in this country is conducted in which they are asked to disclose their feelings on the overall state of moral? values, complete parts? (a) through? (e) below. Use the Tech Help button for further assistance.
(a) Find and interpret the probability that exactly 15 of those surveyed feel the state of morals is poor. The probability that exactly 15 of those surveyed feel the state of morals is poor is What? (Round to four decimal places as needed.)
in the game of craps two dice are thrown and the outcome of a bet is based on the sum of the two dice. if you bet 1
In a regression model involving 30 observations, the following estimated regression equation was obtained:
a recent national survey found that high school students watched an average mean of 6.7 dvds per month with a
identify the type of sampling used random systematic convenience stratified or cluster. to estimate the percentage of
The random variables X and Y each take values -1 and 1, and p(X=1)=a, P(Y=1)=b. Suppose Z=XY and that X, Y and Z are pairwise independent. What are the values of a and b? are {X,Y,Z} independent?
Personal phone calls received by a new employee was 3,5, and 6. assume that samples of size 2 are randomly selected with replacement from this population of three values. Find the mean of the distribution.
510 people were asked which of four fast food restaurant were their favorite. Determine if there is a preference for any one place over any other.
The manufacturer of a computer terminal reports in its advertising that the mean life of the terminal, under normal use, is 6 years, with a standard deviation of 1.4 years.
An important subcomponent of a medical device produced by a manufacturing line is normally distributed with mean 70.2" and standard deviation is 1.26".
Suppose a stock analyst wants to determine whether there is a difference in the mean rate of returns for three types of stock - utility, retail, and banking.
through years of careful observation you have begun to suspect that how vocal cats are is somehow related to the
Assume the least squares equation is Y' = 10 + 20X. What does the value of 10 in the equation indicate? Y intercept. For each unit increased in Y, X increases by 10.
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