Determining the sampling technique
Identify which sampling technique was used in the following study:
A journalist asks 17 friends about their opinion on the last World Series baseball game.
a. systematic sampling
b. cluster sampling
c. convenience sampling
d. stratified sampling
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A skeptical paranormal researcher claims the proportion of Americans that have seen a UFO, p, is less than 1 in every one thousand. Identify the type 2 error for the test.
Two accounting professors decided to compare the variation of their grading procedures. To accomplish this they each graded the same 10 exams with the following results:
Find the probability that during any given period of one week, it will receive a) at least 10 b) exactly nine, and c) at most 12.
Given the following Analysis of Variance table for three treatments each with six observations. What is the mean square for treatments.
Identify which sampling technique was used in the following study: A journalist asks 17 friends about their opinion on the last World Series baseball game.
The store used ANOVA to test if the mean sales for each credit card were equal. What are the degrees of freedom for the F statistic?
A c chart is to be used to control soldering imperfections on a certain mass-produced circuit board. Calculate 3-sigma control limits and the central line for the c chart.
What are the degrees of freedom for the machines, operators, interaction and error? What is the critical value of F for the machine effect at the 1% level of significance?
A preliminary study of hourly wages paid to unskilled employees in three metropolitan areas was conducted. Seven employees were included from Area A, 9 from Area B and 12 from Area C. The test statistic was computed to be 4.91. What can we conc
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