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A mandatory competency test for high school sophmores has a normal distribution with a mean of 400 and a standard deviation of 100. The top 3% of students receive $500. What is the minimum score you would need to receive this award?
The use of linear regression is a critical tool for a manager's decision-making ability. Please carefully read the example below and try to answer the questions in terms of the problem context.
If 8 women are randomly sampled, what is the probability that 0 through 8 of the women are employed outside the home?
To test whether the significant difference between two sample variance using F-tests.
A random sample of 100 entering freshmen is selected. What is the distribution of the mean composite ACT score, for the University?
Large university health system, 55 of 120 randomly selected physicians were women. Find the critical values to two decimal places if alpha=0.05.
Sample of 81 houses was studied and found to have the mean of 1858 KWH. Determine the 95% confidence interval for true mean.
An automobile company thinks that with new designs, it scars will last longer before having a problem. For this reason the company wishes to extend the warranty that comes with the vehicle in hopes of attracting more customers.
If the level of significance is 0.05, what is critical value to set up the decision rule to test the claim that the liberal arts students perform better than engineering students on average?
Computing the probability values using normal distribution - what proportion of licensed drivers are less than 30 years old?
The area under a normal curve is always equal to 1, no matter what the mean and standard deviation are.
10 cobalts are ramdomly selected and the miles per gallon for each car are recorded. What is the probability that the mean miles per gallon exceeds 34 miles per gallon?
The data collected was for each car for each type of fuel. Performance was measured in miles per gallon. Perform an ANOVA test and state the results.
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