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DQ 3 - Make a prediction about opportunities and challenges that an increase in diversity may present in the United States in the next 50 years.
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Which of the following is not a criterion for choice in decision making under uncertainty? a. Equal probabilities (Laplace). b. Pessimistic. c. Coefficient of optimism (Hurwicz). d. Optimistic. e. Maximax regret.
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A decision variable is always considered as: a. Controllable. b. Uncontrollable. c. Dependent. d. Dynamic. e. Probabilistic.
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The expected value of perfect information: a. Is always equal to the largest expected opportunity loss. b. Is calculated by assuming that the highest-yielding state of nature is always going to occur. c. Is never more than the expected value without perfect information. d. Is the most...
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A manufacturer knows that their items have a normally distributed length, with a mean of 10.3 inches, and standard deviation of 0.7 inches. If 21 items is chosen at random, what is the probability that their mean length is less than 10.5 inches
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a politicians claims that at least 70% of the voters in his district agree with his stand on the gun control issue. Test his claim at the 0.03 level of significance. (Note: a random sample of 500 voters was taken from his district. 344 of them agreed his his stand.
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The data below shows the number of beverages bought during a week by the employees from their cafeteria (using the employee discount card) and their hourly salary. Calculate the correlation coefficient and explain the obtained result. Hourly Wage (X) Beverages (Y) $12 50 $14 30 $15 20 $13...
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A women s clothing department wants to find out if there is a relationship (and what kind of relationship) between the price of an item and the time that it takes to a customer to decide in buying that item. Item Price Decision Time (in minutes) $30 15 $20 18 $300 30 $80 20 $70 40 $25...
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The Tea&Coffee shop is advertising their green tea supply. They claim that the more green tea you drink the longer you leave. We want to see if the quantity of drinking green tea (per week) really affects people longevity. Write out the regression equation. What is the correlation...
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Using the raw measurement data presented below, determine whether or not there exists a statistically significant difference between the salaries of female and male human resource managers. Develop a research question, testable hypothesis, confidence level, and degrees of freedom. Draw the...
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- 1. A school administrator wonders if students whose first language is not English score differently on the math portion of the sat exam than students whose first language is English. The mean SAT math score of students whose first language is english is 516 on the basis of data obtained from the college board. A simple random sample of 20 students whose first language is not English result in a sample mean SAT math score of 522. SAT math score are normally distributed with a population standard deviation of 114. Why is it necessary for SAT math scores to be normally distributed to test the hypothesis?
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