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The life expectancy of a common brand of battery is normally distributed with a mean of 400 hours and a standard deviation of 120 hours. What is the probability a randomly selected battery will last at least 300 hours?
Determine expected cell counts if null hypothesis is true and show them in a two-way table. Determine the chi-square() statistic?
Use frequency distribution to create a probability distribution, determine the (b) mean,(c) variance.
Bill calculates a linear correlation coefficient between two variable as 1.20. How would you interpret this?
Find the percentage of the total variation that cant explained by the linear relationship between the two variable.
Is there evidence to suggest a difference in the mean waiting times at the four body shops?
A college believes that 28% of applicants to that school have parents who have remarried. How large a sample is needed to estimate the true proportion of students who have parents who have remarried to within 5 percentage points with 95% confidenc..
A Patent Medicine Company supervisor assumes that the bottling machine is operating properly if only 5 percent of the processed bottles are not full. A random sample of 100 bottles had 7 bottles that weren't full. Using a significance level of .01..
Define probability and explain its three perspectives. Provide an example of each. Explain the concept of mutually exclusive events. How do you compute the probability P(A or B) when A and B are, and are not, mutually exclusive.
Find the best predicted temperature (in degree F) at a time when a cricket chirps 3000 times in one minute. What is wrong with this predicted value?
A company must hire a new CFO and prepares a final list of five candidates - all are equally qualified. Two of the candidates are members of a minority of a minority group. To avoid bias in the selection of the candidate
The average balance for customer accounts in The Reserve Fund at the time it was frozen by the Securities Exchange Commission (SEC) was $22,500, with a standard deviation of $7,500.
The relationship between energy consumption and average car gas mileage, controlling for GDP.
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