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A frame is a list of all eligible respondents. For a large frame, i.e., a large population, we can ignore the distinction between sampling with replacement and sampling without replacement. Many surveys use the census as a sampling frame. Any bias in this frame?
However, if they lose the first contract, the president thinks that the probability of winning the second contract decreases to 48%. What is the probability that they win both contracts?
For the past 20 years, the high temperature on April 15th has averaged (j = 62 degrees with a standard deviation of a = 8. Last year, the high temperature was 66 degrees.
Interpret the three confidence intervals in terms of whether there is a significant difference between the mean of the sample and a hypothesized mean of 150.
Generate a 95% confidence interval for the true mean total cholesterol levels in children.
What are the chances of getting 15 days of rain during the next 30 days? What do you think about Joe's assumptions concerning the weather for the next 30 days?
Suppose you are on a test and are asked to determine whether the given experiment is binomial, Poisson, or neither. What are you going to think about to determine which test to use. Do you have a checklist? How would you approach this problem?
Aggregate the opinions of the experts by computing the minimum, maximum, 25 th percentile, 50 th percentile, and 75 th percentile values.
Suppose that the following data were obtained for a collection of archaeological sites in New Mexico: Calculate the sample correlation coefficient r.
Public transportation and the automobile are 2 methods an employee can use to get to work each day. Samples of times recorded for each method are shown. Times are in minutes.
Assume that the class has 60 students and 60 minutes to complete the exams. How many students do you expect not to be able to complete the exam in the alotted time?
Compute an F-statistic for each linear construct and determine its significance.
The travel time for a college student traveling between her home and her college is uniformly distributed between 40 and 90 minutes.
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