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Concept explainers
Determine the population and the sample in the following surveys. Is the sample representative?
a. You ask 50 students who have segregated their recyclables at lunch time whether or not they recycle at home.
b. To determine the favourite drink (coffee or tea) among the staff at your school, you ask each teacher, principal, and administrative assistant to write their choice on a card provided and then tally the responses.
c. To determine how many children have seen the new action hero movie over the weekend, you interview 50 children in the school library on the following Monday afternoon.
d. To determine the most popular color of cars in your city, you sit at the only thoroughfare connecting the largest residential district with downtown and tally the colors of passing cars during peak hours on several weekdays.
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Chapter 10 Solutions
A Problem Solving Approach to Mathematics for Elementary School Teachers, Books a la Carte Edition plus NEW MyLab Math with Pearson eText - Access Card Package (12th Edition)
- iid B1 Suppose X1, ..., Xn fx(x), where 2 fx(x) = x exp(−x²/0), 0<< (0 otherwise). (a) Find the maximum likelihood estimator of 0. (b) Show that the MLE is an unbiased estimator of 0. (c) Find the MSE of the MLE. Hint: For parts (b) and (c), you may use integration by parts.arrow_forward2. The size of a claim is modelled by F(a, λ) with a fixed a a maximum likelihood estimate of A given a sample x with a sample mean x = 11 = 121. Give [5 Marks]arrow_forwardRobbie Bearing Word Problems Angles name: Jocelyn date: 1/18 8K 2. A Delta airplane and an SouthWest airplane take off from an airport at the same time. The bearing from the airport to the Delta plane is 23° and the bearing to the SouthWest plane is 152°. Two hours later the Delta plane is 1,103 miles from the airport and the SouthWest plane is 1,156 miles from the airport. What is the distance between the two planes? What is the bearing from the Delta plane to the SouthWest plane? What is the bearing to the Delta plane from the SouthWest plane? Delta y SW Angles ThreeFourthsMe MATH 2arrow_forward
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