When displaying the trend projection graphically, the time period is placed on the y-axis and the forecasted value is placed on the x-axis.
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Q. 2Susan 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 stratified 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) Susan ensures that her sample contains a number of two-story, split-level, and ranch homes in her sample that corresponds to the number of homes in the neighborhood.
Q. 3When the population standard deviation is unknown, we substitute the sample standard deviation in its place to calculate confidence intervals.
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Q. 4Trend projectionis a forecasting technique that projects into the future a linear regression equation that best fits the data in a time series.
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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 cluster 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 cluster sample.
Q. 6When the sample size is more than 30 and sigma is known, the population must be normally distributed to calculate a confidence interval.
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