The correlation coefficient, $r$ , is $0.842$ .
About $16%$ of the variation in value of the car is explained by a linear relationship with the age of the car.
About $40%$ of the variation in the age of the car is explained by a linear relationship with the value of the car.
The correlation coefficient, $r$ , is $0.025$ .

Topic:

The Sampling Distribution of the Sample Mean

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Question 66

A researcher found a study relating the value of a car,

y

, to the age of the car,

x

. When researchers looked at the association of

x

and

y

, they found that the coefficient of determination was

r^{2} = 0.158

Select a conclusion that the researcher can make from this data.

The correlation coefficient, $r$ , is $0.842$ .
About $16%$ of the variation in value of the car is explained by a linear relationship with the age of the car.
About $40%$ of the variation in the age of the car is explained by a linear relationship with the value of the car.
The correlation coefficient, $r$ , is $0.025$ .

Topic:

The Sampling Distribution of the Sample Mean

View solution

Question 67

A scatterplot was created using the miles-per-gallon and weight of 8 cars. Another car is added to the scatterplot (shown in blue in the left side of the graph). Weight of Car vs. Miles per Gallon 45 40

\frac{\frac{π}{0}}{\frac{π}{0}} 25

\frac{1}{0} 20

0015

10 5 0 20 25 30 35 40 45 50 Weight (in hundreds of pounds) Select the TRUE statement about this added point.

Topic:

Confidence Intervals for One Population Mean

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Question 68

The weekly feed cost for Dean's domestic shorthair cat is \ 2

. T h ec a t u se d ina s t u d y w e i g h s 10 p o u n d s . U s in g t h ee q u a t i o n

\hat{y}=0.3+0.12 x$ for the regression line of weekly food cost on weight (weight is explanatory), what is the residual for Dean's domestic shorthair cat?

\ 1.50$
\ 0.54$
\ 1.46$
\ 0.50$

Topic:

Analysis of Variance (ANOVA)

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Question 69

appropriate method. 3) Find the median age of 100 residents of a colony from the following data. 4) If the mean of the following frequency distribution is 50 , then find the value of '

k

'. 5) Find the mode of the following data 6) The distribution below gives the weights of 30 students of a class. Find the median weight of the students.

Topic:

The Nature of Statistics

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Question 70

Which of the following scatterplots shows a correlation affected by an influential point?

Topic:

Descriptive Methods in Regression and Correlation

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Question 71

Which of the following scatterplots shows an outlier in the

y

-direction? Number of Hours of Sleep vs. Test Results Number of Hours of Sleep vs. Test Results

Topic:

Analysis of Variance (ANOVA)

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Question 72

Question 15 To combine multiple cells into one combined cell, which of the following do you use? Column Width command Center button Merge and Center button Increase Indent button

Topic:

Organizing Data

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Question 73

A county is planning to expand its train service. In studying the current service, the county planner looked at which train stations are along or not along various train lines. The Venn diagram shows this information for three of the lines. (a) Select all the train lines that have a stop at Quilmes.

□

Green Line

□

Purple Line

□

Red Line (b) How many stations are only along the Green Line? (c) Which stations are only along one of the three lines (the Green Line, the Purple Line, or the Red Line)? Choose all that apply. Athens Bern Fes Graz Haifa Ilion Kent Lahti Nara Okene Quilmes Radom Santos Trento

□

Ulm

Topic:

The Nature of Statistics

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Question 74

Argument Unit To practice using rhetorical devices and elements of argument, you are going to write a letter to persuade your reader to believe something. The letter should be a minimum of 250 words and use the following:

An emotional appeal
Alogical appeal
A statement to prove your credibility
A link to any sources referenced for your writing (optional).

Topic:

Inferences for Two Population Means

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Question 75

Name: Points earned: 1. When asking questionnaire items, the survey interviewer should

ask every question even if the respondent has apparently answered it already.
skip questions that the respondent cannot answer and return to them at the end of the interview.
react to a question after the respondent has answered to show interest
give help on difficult questions.
summarize the respondent's answers so that they are more meaningful answers.

Topic:

Organizing Data

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Question 76

Here is a Venn diagram showing the sets