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In a study to estimate the proportion of residents in a city that support the construction of a new bypass road in the vicinity, a random sample of 1600 residents were polled. Let X denote the number in the sample who supported the proposal. To estimate the true proportion in support of the plan, we can compute p^=X+1600?/21600. The estimator p^ has bias
A. 1/(2×40).
B. 40/2.
C. 1/40.
D. 1/1600.
E. 0, so unbiased.
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.
What are the appropriate H0 and Ha for each of the following research studies? In addition, note whether the hypothesis test is one- or two-tailed.
final averages are typically approximately normally distributed with a mean of 71 and a standard deviation of 8. your
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Are the factors to be considered fixed effects? Does it seem reasonable that if you were to repeat the survey, you would select the same sexes and species?
(A) At the 0.05 level of significance, use the six step critical value approach to hypothesis testing to try and prove that the 2004 proportion has increased. (B) Use the 5 step p-value approach. Interpret the meaning of the p value.
Can we conclude that there is a difference in number of citations written between the officers? Use the 0.05 level of significance.
1 assume you are presented with the following mutually exclusive investments whose expected net cash flows are as
Discuss the factors which might cause variation in the weight of Tootsie Rolls during manufacture.
1. In a regression model involving 50 observations, the following estimated regression model was obtained:
If the amount of cosmic radiation to which a person is exposed while flying by jet across the US is a random variable having the normal distribution with µ=5.35 mrem, and σ = 0.59 mrem.
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