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Use the binomial distribution with n = 20, π = .5 to compare accuracy of the normal approximation to the binomial.
a. Compute the exact probabilities and corresponding normal approximations for y = 5.
b. The normal approximation can be improved slightly by taking P(y = 4.5). Why should this help? Compare your results.
c. Compute the exact probabilities and corresponding normal approximations with the continuity correction for P(8 y 14).
You have been assigned to analyze the accounting information for a Fortune 500 corporation. From the e-Activity, evaluate which tools you would use to analyze its business processes, indicating your rationale.
a college requires applicants to have an act score in the top 12 of all test scores. the act scores are normally
Fix-It Copiers advertises a mean time of 100 minutes for office calls with a standard deviation of 25 minutes. What percentage of calls are completed.
Sketch the appropriate distribution, and locate the critical region for a = 0.05.
Suppose that highway gas mileage rates for both of these cares are uniformly distributed over a range of 20 to 30 mpg. What proportion of these cars would fall into the 22 to 27 mpg range? Compute the proportion of cars that get more than 28 m..
Four research participants take a test of mannual dexterity (high scores mean better dexterity) and anxiety test (high scores mean more anxiety). Scores are as follows:
Please assist regarding an index based on how people feel about the economy. In this case, the base was 1985 and set at 100.
Random sample of 150 viewers last night revealed 53 watched news on WNAE, 64 watched on WRRN, and 33 on WSPD. At .05 significance level, is there a difference in proportion of viewers watching three channels?
Estimate the probability that X > 22 minutes - Show that the density for M is exponential with mean µ/n. Hint : Use cumulative distribution functions
There is a worker error is 0.3, and the probability that an accident will occur when there is no worker error is 0.2. Find the probability of a worker error if there was an accident.
the management of a shop has gathered data on customer purchasing habits and knows that 20 its customers typically make
1. In all the following questions {Zt} is a purely random process with mean E[Zt ] = 0, variance Var(Zt) = σ 2 , and successive values of Zt are independent so that Cov(Zt , Zt+k) = 0, k 6= 0.
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