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A four-year university has decided to implement a new approach to teaching Statistics. Full-time and adjunct professors were surveyed to determine whether they preferred the traditional lecture approach or a computer approach to teaching Statistics. Use hypothesis testing to test the independence of opinion between the two groups. Full-time prefer lecture 8 prefer computer 13 no preference 6 Adjunct prefer lecture 11 prefer computer 22 no preference 10. What is the test value?
a) 0.36
b) 0.97
c) 0.14
d) 1.24
a computer repair shop gets computers on regular basis for repairs. the repair time between two computers is
You just saw an ad on television that states the majority of the population would vote to make smoking illegal. The poll that is referenced shows 53% of those asked supported making smoking illegal.
Use the Standing data set to develop a point estimate of the number of minutes during an NFL game that players are standing around between plays. Round your answer to two decimal places. What is the sample standard deviation? Round your answer to ..
Explain how much should the airport authority be willing to pay for perfect information about the success of a brand new airport.
a researcher wishes to estimate with 95 confidence the proportion of adults who have high-speed internet access.
A poll found that 38% of male voters and 46% of female voters support a particular candidate. To test whether this candidate has equal levels of support between male and female voters, the null hypothesis should be:
Compute a 3 month moving average forecast of demand for April through January (of the next year). Compute a 5 month moving average forecast for June through January
You use it to call 250 randomly chosen residential telephones in Florida. Of the registered voters contacted, 33% are registered Democrats. Is each of the boldface numbers a parameter or a statistic?
The table given below shows joint probability distribution of X and Y . Determine the covariance between the X and Y ?
Of the 1,4000 homemakers sampled, 420 were able to identify the brand by name. Compute the standard error of the proportion.
Measures the discrepancy b/w the data and the null hypothesis. We can make large values of T are evidence against H0 in most cases. Explain why?
let x denote a geometric random variable with parameter p. for s gt0 compute ee-sx. for what other values of s is your
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