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According to Best buy, 2/3 citizens have iPods. In a randomly selected group of 3 iPod owners, what is the probability that all 3 would iPods from best buy? Or at least one would have iPod from best buy?
Test whether race and NATFAE are independent (α = 0.05). What do you conclude?
When modelling E(y) with single qualitative independent variable, number of 0 - 1 dummy variables in model is equal to number of levels of qualitative variable.
A business owner decides to use a binomial distribution to solve one of his problems.
What is sampling error? Could value of sampling error be zero? If it were zero, what would this mean?
For sample of size 100, what is the mean and standard deviation of the sample mean.
How likely is it that the store owner will make at least $7,000 if she implements your suggestion?
Find out the variance for percentage of tickets? Determine the probability that your sample will have the average between 70 and 75?
Can we compute the mean length of stay of workers at the company differs from the mean length of stay at that dangerous industry.
To sketch the 3-sigma X-bar chart and R-chart parameters. A candy bar manufacturer desires to set up a variables control chart for the net weight of its candy bars.
Hypothesis test for the difference between two means - Assume the population standard deviations are not the same. At the 0.05 significance level, is there a difference in the mean waiting time?
Assuming the sample size of 40 can be considered as large, compute the confidence interval for a confidence level of 90%.
Identify each of the random variables as continuous or discrete.
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