Simple linear regression describes a straight line that explains how a change in a dependent variable influences a change in an independent variable.
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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 systematic 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 an equal number of two-story, split-level, and ranch homes in her sample
Q. 3A 99 confidence interval has a greater chance of catching the true population mean when compared to a 90 confidence interval.
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Q. 4For a relatively large beta (closer to 1.0), the current trend adjustment is more affected by the most recent trend when using exponential smoothing with trend adjustment.
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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 convenience 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 convenience sample.
Q. 6John is the manager at a fast food restaurant and would like to determine the average number of cars waiting for their order in the drive-through line during his hours of operation.
Every day at noontime, he counts the number of cars in the drive-through. Because of the lunchtime traffic, his survey overestimates the actual average throughout the day. This error is due to __________.A) sampling error
B) nonsampling error
C) nonprobability error
D) periodicity
Q. 7A 100 confidence interval is more accurate than a 90 confidence interval and is therefore more preferable.
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