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A sociologist is studying Retired Canadians living in Hawaii. A sample of 160 retirees who had previously lived in British Columbia or Alberta revealed that they were from the following cities:
City Obs. Freq.Victoria 40Vancouver 54Edmonton 32Calgary 34
At the 0.05 significance level, can we conclude that equal numbers of Canadian retirees living in Hawaii came from each of the four cities? (Hint: for full marks, state the null and alternative hypotheses, calculate the appropriate test statistic, determine the p-value, state your conclusion)
Find the correlation coefficient for the data. Find the equation for the regression line for the data and predict the final grade of a student who misses 3.5 days.
Regression model results can be erroneous if multicollinearity is an issue. What causes multicollinearity? If the intercept is statistically significant, what does this tell you?
He argues that regression effect says people who do very poorly in their previous job tend to perform well in their next job. Is this what the regression effects? Describe in detail.
When n = 250, determine the probability that proportion of couples in sample who are racially or ethnically mixed will be greater than 0.07?
Suppose you always reject the null hypothesis, regardless of any sample evidence.
What is the calculation if facebook reports that the average number of facebook friends worldwide is 175.5 with a standard deviation of 90.57 . If i was to take a sample of 25 students, what is the probability that the mean number of facebook frie..
A citrus company is interested in evaluating the performance of two orange juice extractors, A and B. It is believed that both the size and the variety of the fruit yield in the test may influence the yields (percentage juice by weight) obtained f..
The yield strength of a metal bolt has a mean of 6,050 pounds with a standard deviation of 100 pounds. Twenty samples of three bolts were tested, resulting in the means shown below.
Select a US citizen and a citizen of China at random, independently of one another. Determine the probability that both have type O blood?
How would you use the concept of probabilities to apply to profiles for hiring more satisfied individuals?
According to an internet posting, 80% of adults enjoy drinking beer. Choose a group of 3 adults at random. The probability that none of them enjoy drinking beer is:
Does this data provide evidence at the .05 significance level that there is a difference in the proportion of humorous ads in British versus American trade magazines? Please show work.
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