This scatter plot shows the relationship between students’ scores on the first exam in a class and their corresponding scores on
the second exam.
Which of the following is the best estimate of the average change in the score on exam 2 associated with a 1 point increase on the score on exam 1?
A) 1/4 point
B) 1/2 point
C) 1 point
D) 2 points
Please explain your answer
Which of the following is the best estimate of the average change in the score on exam 2 associated with a 1 point increase on the score on exam 1?
A) 1/4 point
B) 1/2 point
C) 1 point
D) 2 points
Please explain your answer
1 answer:
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Answer:
13. .
14.
15. 2.
Step-by-step explanation:
13.
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=
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= .
14.
.
15.
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= 2.
Hope this helps!
Answer:
a) 0.71
b) 0.9863
Step-by-step explanation:
a. Given the mean prices of a house is $403,000 and the standard deviation is $278,000
-The probability the probability that the selected house is valued at less than $500,000 is obtained by summing the frequencies of prices below $500,000:
Hence, the probability of a house price below $500,000 is 0.71
b. -Let X be the mean price of a randomly selected house.
-Since the sample size 40 is greater than 30, we assume normal distribution.
-The probability can therefore be calculated as follows:
Thus, the probability that the mean value of the 40 houses is less than $500,000 is 0.9863