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1.) If the population is normally distributed then the sample mean is also normally distributed even for small sample size.
True or false?
2.) In applying the Rule of Addition in Probability, the important consideration is whether they are mutually exclusive or not.
Construct a probability for the number of students in the sample who watch soap operas.
Compare two models. Model #1 has an r-squared of .25 and an adjusted r-squared of .10. Model #2 has an r-squared of .20 and an adjusted r-squared of .14. Given this information, what model should you use?
A bank asks customers to evaluate the drive-through service as good, average, or poor. Which level of measurement does this classification illustrate?
Compute the median number of dependents?
Consider the following situation describing layoffs at a manufacturing plant of the Monsanto Company. Does there appear to be a case of age discrimination between those laid off and those non-laid off?
The Queen Mary sails between England and the U.S. Stowaways are sometimes found on board. The ages (years) of stowaways from eastbound and westbound crossings are given below. Eastbound: 24, 24, 34, 15, 19, 22, 18, 20, 20, 17 Westbound: 41, 24, 32..
Explain the difference between the null and alternative hypothesis. Which one can be proven in a statistical sense?
Use differential calculus to find both sales volume at which revenue is maximised and the maximum revenue available from sales of product X.
Consider the following time plot of the values of variable Y for each month of a 60-month period. This plot displays
Find out the probability that: (a) The amount requested is between $65,000 or more?
Use the five-step p-value approach to hypothesis testing and a 0.05 level of significance to determine whether the proportion of full-time students at Miami University is different from the national norm of 0.46.
Which of the following would be most helpful in assessing the practical significance of a test of hypotheses about a proportion?
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