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bảng tính1st Quarter Test
Total câu hỏi: 39
Worksheet time: 34mins
The response variable is:
The variable we expect to explain or predict the value of the explanatory variable.
Sometimes called the independent variable (IV)
The variable we expect to change in response to the explanatory variable
Also known as EV
We wish to investigate the relationship between the number seeds planted in a garden and the number of fruit grown. The explanatory variable (EV) is
The number of fruit grown
The amount of soil in the garden
The number of hours spent watering the plants
The number of seeds planted
We wish to investigate the relationship between the time spent shopping and the number of items bought. The response variable (RV) is
The number of items bought
The number of items at the shop
The time spent shopping
The time spent getting to the shops
Which of the following is true?
We use the response variable to explain changes that might be observed in the explanatory variable.
The explanatory variable is the variable we expect to be explained by the response variable
The response variable is also known as the predictor variable
The explanatory variable is used to explain or predict the value of the response variable
We wish to investigate whether a person’s age can be predicted from their IQ score. Which is the explanatory variable (EV)?
Age
IQ Score
Both Age and IQ Score
None of the Above
Determine the correlation coefficient of the given data:
.9820
-.9643
-1.409
.164
What can we determine from the correlation coefficient (r)?
Style + Type
Percentage + Direction
Strength + Direction
Strength + Style
y=1.5x+46 is the trendline equation for hours spent studying (x) and test score (y). What is the meaning of the slope, in context?
For every 6 hours of studying, the test score increased by 1 point
For every 1 hour of studying, the test score increased by 6 points
For every 1 hour of studying, the test score increased by 1.5 points
For every 1.5 hours of studying, the test score increased by 1 points
y=0.32x−20.51 is the trendline equation that predicts the number of hits (y) for the number of times at bat (x). How many hits should a coach expect if the player is at bat 175 times?
35
49
609
62
The scatter plot below shows the average yearly consumption of bottled water by people in the United States starting in 1990. Using the line of best fit, predict the average consumption of bottled water in the year 2000?
20 gallons
18 gallons
21 gallons
19 gallons
A keyboarding instructor at a community college collected data comparing a student’s age and their typing speed. The equation for the line of best fit is given as y=−1.4x+117.8 , where x is the “age in years” and y is the “typing speed.
How old would she predict a student is if they type 83 wpm?
25
16
32
50
Skewed up
Skewed down
Skewed to the right
Skewed to the left
What is the median gas mileage for SUV's?
19
20
21
What is the mode?
88%
89%
97%
91%
How does the median number of miles driven for Driver A compare to the median number of miles driven for Driver B?
Driver B drives much less than Driver A when comparing medians.
The medians are the same
Driver A drives much less than Driver B when comparing medians.
Driver A and Driver B make the same amount of money.
