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According to a study by the American Pet Food Dealers Association, 58 percent of U.S. households own pets. A report is being prepared for an editorial in the San Francisco Chronicle. As a part of the editorial a random sample of 315 households showed 260 own pets. Does this data disagree with the Pet Food Dealers Association data? Use a 0.10 level of significance.
If you want to be 95% confidence of estmating the population mean to within a sampling error of +-4 and the standard deviation is assumed to be 10, what sample size is required?
Reject H0 at β β = .01; there is evidence of a difference between the mean voter turnouts for urban, suburban, and rural precincts.
As a part of the feasibility study, they wish to estimate the mean weekly child-care cost of their employees. A sample of 10 employees who use child care reveals the following amounts spent last week.
Identify and briefly discuss two important concepts ( Prediction and Regression/ Correlation or Regression) applicable to analytical methodology.
Suppose that an executive of a venture capital investment firm is trying to decide how to allocate his funds among three different projects, each of which requires a $100,000 investment.
Perform Repeated Measures ANOVA also calculate PRE. An educational study uses a simple pre-post design to assess the value of a computer tutor for solving inequalities.
A gambler loses 10 times running at roulette. He decides to continue playing because he is due for a win, by the law of averages. A bystander advises him to quit, on the ground that his luck is cold. Who is right? Or are both of them wrong?
Lab technicians at a major mdical lab can process an average of 400 blood samples a day with a standard deviation of 50 samples. The processing follows a normal distribution.
A researcher studies the effect of cognitive psychotherapy on positive self-regard. The number of positive statements made about oneself is recorded for each participant during the first meeting.
A recent election return indicated that 55% voted for a proposal, 40% voted against it, and 5% abstained. What is the probability that a voter either abstained or voted against the proposal?
What is the null and alternative hypothesis? What is your final conclusion?
Describe what type of control chart you can use and how do you calculate the control limits to check if the software design process in this organization is in control.
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