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Suppose you are a researcher who has collected and analyzed a sample of values. When you perform a hypothesis test the p-value is calculated to be 0.051. Would you reject or fail to reject the null hypothesis? Defend your choice.
(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.
A personality psychologist conducts a study to examine the relationship between extraversion and the number of siblings in a household.
Fifty samples of size 600 were drawn from a manufacturing process and the number of defectives in each sample was counted.
Suppose that you select a 50 families sample. Which is the form expected from the distribution of the average or median of the sample?
Calculate a 95% confidence interval for the average lifetime of the washing machines that the company uses. Calculate the sample size required to reduce the margin of error for a 95% confidence interval down to 7 (i.e. E = 7).
Compute the two groups using Paired sample t-test. Compute which modification reduced the number of traffic accidents
Probability based on addition rule - Find the probability that a randomly chosen sold automobile from this sample is silver or an SUV?
One advantage of the repeated measures ANOVA is that it eliminates "individual differences" as a source of variability. Explain why there are no individual differences in the numerator and in the denominator of the F ratio.
Explain the differences between longitudinal and cross sectional business research studies. Which two types of probability sampling are best suited for business research and statistical data analysis, and why?
The registrar of a college with a population of N=4,000 full-time students is asked by the president to conduct a survey to measure satisfaction with the quality of life on campus.
Determine the 95% confidence interval for your estimate what data have you utilized as the basis of your predictions what suppositions have you made.
Martin Motors has in stock three cars of the same make and model. The president would like to evaluate the gas consumption of the three cars (labeled car A, car B, and car C) using four different types of gasoline. For each trial, a gallon of gaso..
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