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A survey shows that distribution of the annual salaries of high school teacher in a certain school district is approximately bell-shaped with a mean of $45, 000 and a standard deviation of $3, 500. What percentage of teachers earn anywhere from $38, 000 to $48, 500?
In your environment (business or personal), please describe a hypothesis test related to a decision. What would be your data? What would be your null hypothesis? What would be your alternate hypothesis? What would be your Type 1 and Type 2 errors ..
Is your sample of MSU students significantly different from the population of MSU students in terms of the number of classes they take per semester (use alpha level .05)? To answer this question, follow all of your steps for hypothesis testing.
The mean difference in total cholesterol levels (after - before) was 27.138 mg/dL with a standard deviation of 7.3685 mg/dL. Create a 95% confidence interval for the true average difference in cholesterol levels by the drug.
Identify and briefly describe an important process in your workplace, including selection of one key quantitative variable, that you (and others in your organization) consider an important metric for how well the process is functioning.
A regional manager visits local fast-food franchises and evaluates the speed of the service. If the manager receives her meal within 45 seconds, the server is given a free movie-admission coupon.
What type of probability distribution will most likely be used to analyze the number of chocolate chip parts per cookie in the following problem?
Test the hypothesis that the annual incomes of Teachers in areas of more than 500,000 are significantly more than those in areas of less than 100,000. Use the 5% level of risk.
Create a 95% confidence interval for mean cost of repairs. Interpret this interval.
We want to test the hypothesis about fairness of spinning the coin. Evaluate the true proportion of heads. Use 95% confidence interval. Do not forget to check conditions first.
Differences in Descriptive and Inferential Statistics and analyze the differences between descriptive and inferential statistics.
What is the expected number of students who have registered on a pass/fail basis? What is the probability that more than three are registered on a pass/fail basis?
Five cards are drawn from an ordinary deck without replacement. Find the probability of getting:
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