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A coefficient of determination of 0.9 shows that 10% of variation in the dependent variable is caused by change in the independent variable.' Is this true?
To evaluate average annual expenses of students on books and class materials sample size 36 is taken.
a. What z-score separates the highest 25% from the rest of the scores?
A food snack manufacturer samples 13 bags of pretzels off the assembly line and weighs their contents. If the sample mean is 14.7 oz. and the sample standard deviation is 0.50 oz., find the 95% confidence interval of the true mean.
Assume that a 95% confidence interval estimate of the new annual starting salary is desired. How large a sample should be taken if we do not want to exceed $500? What do you know?
A big multinational corporation based in Toronto recently moved it's production facilities to Mexico. When the corporation was in Toronto, it had an older, experienced labour force with a mean age of 45 years.
Multiple choices based on regression analysis - the percentage of variation in the dependent variable explained by the variation in the independent variable
Find the probability that fewer than 10 of those sampled currently have access to online services.
If the rods' lengths produced by your line are normally distributed, with a mean equal to the target of 0.2 meters, and a standard deviation of 0.015m, what percentage of rods will be scrapped?
The mean amount purchased by a typical customer at Churchill\'s Grocery Store is $23.50 with a standard deviation of $5.00. Assume the distribution of amounts purchased follows the normal distribution. For a sample of 50 customers, answer the foll..
How much of the variation in the dependent variable would be explained by the independent variable in this situation? Use job satisfaction and employee turnover as the variables for this problem.
A seven member committee of students is formed to study environmental issues. What is the likely hood that anyone of the seven is chosen as the spokes person?
1.a bank wants to get new customers for their credit card. they try two different approaches in their marketing
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