A study is under way to determine the average height of all 29,000 adult pine trees in a certain national forest.The heights of 600 randomly selected adult pine trees are measured and analyzed.The parameter in the study is:

A) the average height of the 600 randomly selected adult pine trees.
B) the average height of all the adult pine trees in this forest.
C) all the adult pine trees in this forest.
D) the 600 adult pine trees selected at random from this forest.

A descriptive measure of a population is called a parameter.

M Studios is ordering a new type of camera, which costs $315. M Studios allows 35% of cost for operating expenses and 20% of cost for profit. What selling price should M Studios advertise the camera at?

Roll a fair 6-sided die; record the number.

A) {1,2,3,4,5,6},not equally likely
B) {1,6},equally likely
C) {1,2,3,4},equally likely
D) {1,6},not equally likely
E) {1,2,3,4,5,6},equally likely

Consider the four points (20,20) ,(30,50) ,(40,30) ,and (50,60) .The least squares line is $\hat{y}=5+50x$ Explain what "least squares" means using these data as a specific example.

A) The line $\hat{y}$ = 5 + 50x minimizes the sum of the vertical distances from the points to the line.
B) The line $\hat{y}$ = 5 + 50x minimizes the sum of the squared vertical distances from the points to the line.
C) The line $\hat{y}$ = 5 + 50x minimizes the sum of the squared horizontal distances from the points to the line.
D) The line $\hat{y}$ = 5 + 50x minimizes the square of the standard deviation.
E) The line $\hat{y}$ = 5 + 50x minimizes the sum of the squared difference between the x and y values.

In a two-way ANOVA, it is easier to interpret main effects when the interaction component is not significant.

During the winter season,a prominent newspaper reporter is interested in writing a story about the lack of proper heating of apartment buildings in the city in which he lives.During a particular frigid weekend,this reporter manages to interview almost everyone in his own apartment building.The reporter finds that everyone,including himself,is satisfied with the heating in the apartment building.Identify the type of sampling used in this example.

A) Cluster sampling
B) Convenience sampling
C) Voluntary response sampling
D) Systematic sampling
E) Attempted census

{Game Winnings & Education Narrative} Use the regression equation to determine the predicted values of y.

Compute the total commission for the following commission payment plans.​
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The group you wish to generalize your results to is called the ______.

A) population
B) sample
C) sampling error
D) general group