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A software company is interested in improving customer satisfaction rate from the 64% currently claimed. The company sponsored a survey of 194 customers and found that 133 customers were satisfied.
What is the test statistic z?
determine the point estimate of the population proportion the margin of error for the following confidence interval and
Compare the two servers with respect to the approximate centers (locations) of their tip percentage.- Compare the two servers with respect to the variation (spread) among tip percentages.
the data in table are diameters in mm of holes in a group of 12 wing leading edge ribs for a commercial transport
a. What is the population of this survey? 350 b. What is the size of the population? 9500
Find method of moments estimators for r and p. [Here E[X] = r(1 - p)/p and E X2 = r(1 - p)(r - rp + 1)/p2.]
Suppose a pair of random variables (X,Y) uniformly distributed over a rectangular region - Find the conditional PDF (X,Y).
Graph the residuals and comment on evidence of autocorrelation - Perform a Durbin-Watson test for autocorrelation comment on the signs and values of the coefficients and comment on whether Age and N individually influence the auction price.
Use the Correlation and Regression applet to create your own exercise to explore how the least-squares line behaves when points are moved.
Olympic Track related question: You know the last 5 race times at the same distance for 8 runners competing in a race. As such, you can calculate the mean, sd, and variance for each.
Give a 99% con?dence interval for the proportion of people in the given age group who may be successfully treated with the facial cream.
based on the certain data a null hypothesis is rejected at the 0.05 level of significance. would it also be rejected at
Determine the expected number of Republicans who will win office in the coming election? Illustrate the standard deviation of r?
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