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A statistics instructor wants to measure the effectiveness of his teaching skills in a class of 72 students (N = 72). He selects students by waiting at the door to the classroom prior to his lecture and pulling aside every third student to give him or her a questionnaire.
(a) Is this sample design an example of random sampling? Explain.
(b) Assuming that all students attend his class that day, how many students will he select to complete the questionnaire?
What was the test statistic? What was the critical value for both the one- and two-tailed test?
A beverage company is suspected of underfilling its cans of pop. the company claims its cans on average contain 12 oz of pop with standard deviation of .4 oz. A
What is the variance of the Poisson distribution with the mean lambda?
A hospital claims that the proportion of full-term babies born in the hospital who weigh less than seven pounds is no more than 37%.
The incidences of Disease Z were 0.001% and 0.032% in Country A and Country B, respectively. What is the relative risk (RR) of having such disease in Country B
Multiple choice questions each have 6 possible answers, one of which is correct. Assume that you guess the answers to 5 such questions. What is the probability of getting exactly one correct answer when 5 guesses are made?
from a class survey approximately 32 of the students responding said that they have driven a vehicle while under the
Prove that Kendall's coefficient of concondance (Eq. 8.6) is given by
Iron and Death Rate In February 2012, the magazine Health After 50 reported on the Iowa Women's Health Study. Experts used a questionnaire to collect data.
What are some conditions under which business decisions are made using subjective probability concepts? Could you please cite two examples of subjective probability.
Find a 95% confidence interval for the mean amount spent by patients at the pharmacy. Show your calculations and/or explain the process used to obtain the interval.
How does multilinear regression analysis apply to a profession? Specify the dependent value and the set of predictors. Where would you get the data?
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