The St. Joe Company grows pine trees and the average annual increase in tree diameter is 3.1 inches ...

The St. Joe Company grows pine trees and the average annual increase in tree diameter is 3.1 inches with a standard deviation of 0.5 inch.

A random sample of n = 50 trees is collected. What is the probability of the sample mean being less the 2.9 inches?
A) 0.4977
B) 0.0023
C) 0.9977
D) 0.9954

Q. 2

A stem and leaf diagram is an alternative to using:

A) a pie chart.
B) a bar chart.
C) a histogram.
D) an ogive.

Q. 3

The Tukey-Kramer method for multiple comparison is used after the analysis of variance F-test has lead us to reject the null hypothesis that all population means are equal.

Indicate whether the statement is true or false

Q. 4

A large tire manufacturing company has claimed that its top line tire will average more than 80,000 miles. If a consumer group wished to test this claim, the research hypothesis would be: Ha : > 80,000 miles.

Indicate whether the statement is true or false

Q. 5

A fixed effects analysis of variance differs from a random-effects analysis of variance in the way in which the sums of squares are computed.

Indicate whether the statement is true or false

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The St. Joe Company grows pine trees and the average annual increase in tree diameter is 3.1 inches ...

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