Section 6.4 - Reasoning About Data
Complete the following questions
- 1.A data set the shows no clear trend or pattern can be used to
- A.
Write a conjecture
- B.
Support a conjecture
- C.
Reject a conjecture
- D.
Find an outlier
- 2.Which of these lines or curves of best fit would support a conjecture that as outside temperature increases, the fewer people go to the athletic club
- A.
A line of best fit that shows a positive slope
- B.
A line of best fit that shows a negative slope
- C.
A line of best fit that shows a zero slope
- D.
A curve of best fit that shows a slight upward curve
- 3.
Keren used the data in the table to make a conjecture about whether starting teacher salary and the amount spent per pupil are related. To assure that her conjecture is valid, what should Keren do?- A.
Rewrite her conjecture to include the outlier
- B.
Extend the curve of best fit
- C.
Use a line of best fit instead of a curve
- D.
Gather more data
- 4.When is it not valid to use the line of best fit to make prdications about the general population?
- A.
When the data set is small
- B.
When the data shows a smooth curve
- C.
When there is an outlier
- D.
When there is a negative slope
- 5.To support a conjecture, a plot must show which of the following?1) A positive correlation 2) A negatice correlation 3) A trend or pattern
- A.
1 only
- B.
2 only
- C.
3 only
- D.
1, 2, and 3
- 6.
Rebecca collected this data of the math grades of grade 9 students and the number of siblings each student has. What conjecture is supported by the data?
- A.
People with fewer siblings do better in math
- B.
People with 3 or more siblings do worse in math
- C.
People with no siblings do the best in math
- D.
People with more siblings do better in math
- 7.
Which conjecture is supported by the data?
- A.
The shorter the time between eruptions, the longer the eruption
- B.
The longer the time between eruptions, the longer the eruption
- C.
The longer the time between eruptions, the shorter the eruption
- D.
The time between eruptions remains constant, regardless of the length of the eruption.
- 8.Suppose that you plot two variables on a scatter plot, and then draw a curve of best fit. What does it mean if the curve faces downward?
- A.
The data show no relation
- B.
The data contradict the conjecture
- C.
There is not enough data
- D.
The data show an inverse relationship
- 9.
What is the relationship between the variables
- A.
As temperature increases, the number of chirps decreases
- B.
The number of chirps remains constant regardless of temperature
- C.
The number of chirps increases as temperature increases
- D.
There is no relationship between the variables
- 10.
Which point is an outlier for the data set?
- A.
(16, 0.86)
- B.
(1.2, 0.94)
- C.
(114, 0.16)
- D.
(87.6, 1.1)
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