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Often the values 1, 2, 3, 4 and 5 are assigned to categories such as "Strongly Disagree," "Disagree Somewhat," "Neutral," "Agree Somewhat," "Strongly Agree." This question has to do with such a "scaling." (The scale is called a Likert scale.)
Of all random variables taking the just values 1, 2, 3, 4, 5, the one with Pr{X = 1} = 1/2 and Pr{X = 5} = 1/2 has maximum standard deviation. What is the value of the variance of this random variable?
Find a 95% confidence interval for the difference in the average room rates for the Hotel A and the Hotel B chains. (Round your answers to two decimal places.)
A typesetting agency used by a scientific journal employs two typesetters. Let X1 and X2 denote the number of errors committed by typesetter 1 and 2.
According to an internet posting, 80% of adults enjoy drinking beer. Choose a group of 3 adults at random. The probability that none of them enjoy drinking beer is:
Is there any evidence to suggest that the proportion of children with asthma who are exposed to second-hand smoke is greater than the proportion for children without asthma? Use a = 0.01.
Every 5 years the Conference Board of the Mathematical Sciences surveys college math departments. In 2000 the board reported.
Come up with a survey: Pick a population. Come up with 4 variablesà 2 Quantitative & 2 Qualitative (make up numbers)
Refer to Example, comparing the proportion of children with ear infections while taking xylitol or a placebo. Read the discussion of Type 1 and Type 2 errors.
suppose that pmale birth 0.5. a couple wishes to have exactly 2 female children in their family. they will have
The natural rate of capacity utilization is defined as the rate at which Y is zero. What is this rate for the period under the study?
After completing Phase of the Lab Project, you now have 2 important variables in relation to your research question: a score representing understanding of Christian doctrine, and a variable representing amount of church attendance.
You plan to obtain a simple random sample of 30 students by using the sampling frame of students present next Monday.
Conduct a hypothesis test to determine if the population mean time on death row could likely be 15 years. State the distribution to use for the hypothesis test
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