Susan would like to conduct a survey of homeowners in the Meadowbrook neighborhood to get their opinions on proposed road modifications in the area. She would like to sample 50 homes using systematic sampling.
There are a total of 200 homes in the Meadowbrook neighborhood. What value of k should Susan use?A) 4
B) 10
C) 50
D) 200
Q. 2AT&T would like to test the hypothesis that the proportion of 18- to 34-year-old Americans that own a cell phone is less than the proportion of 35- to 49-year-old Americans.
A random sample of 200 18- to 34-year-old Americans found that 126 owned a smartphone. A random sample of 175 35- to 49-year-old Americans found that 119 owned a smartphone. If Population 1 is defined as 18- to 34-year-old Americans and Population 2 is defined as 35- to 49-year-old Americans, and using = 0.01, the conclusion for this hypothesis test would be that because the test statistic is _____________________________
_____________________________
_____.A) less than the critical value, AT&T can conclude that the proportion of 18- to 34-year-old Americans that own a cell phone is less than the proportion of 35- to 49-year-old Americans
B) less than the critical value, AT&T cannot conclude that the proportion of 18- to 34-year-old Americans that own a cell phone is less than the proportion of 35- to 49-year-old Americans
C) more than the critical value, AT&T can conclude that the proportion of 18- to 34-year-old Americans that own a cell phone is less than the proportion of 35- to 49-year-old Americans
D) more than the critical value, AT&T cannot conclude that the proportion of 18- to 34-year-old Americans that own a cell phone is less than the proportion of 35- to 49-year-old Americans
Q. 3The slope of the regression line in trend projection measures the rate at which the forecasted variable changes from one time period to the next.
Indicate whether the statement is true or false
Q. 4When substituting the sample standard deviationfor the population standard deviation, we can no longer rely on the normal distribution to provide the critical z-score for the confidence interval.
Indicate whether the statement is true or false
Q. 5Susan would like to conduct a survey of homeowners in the Meadowbrook neighborhood to get their opinions on proposed road modifications in the area. Which of the following is an example of a simple random sample?
A) Susan randomly chooses two streets in the neighborhood and selects every home on these streets.
B) Susan selects the first 20 homes that she passes as she walks into the entrance of the neighborhood.
C) Susan selects every third house on each street in the neighborhood.
D) None of these choices describes a simple random sample.
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