Answer:
Step-by-step explanation:
Considering the complete question attached in figure.
Consider
Hadley = x
Parker = y
Greenville = z
Distance between Greenville and Parker = yz = 29
Given that distance between Hadley and Greenville is 13 miles less than the distance between Parker and Greenville.
xz = yz -13 --- (1)
Distance between hardley and greenville = xz = ?
From (1)
xz = 29 -13
xz = 16 miles
So Alan is right that distance between Hadley and Greenville is 16 miles
Answer:
b) 95%
Step-by-step explanation:
We have been given that scores on an approximately bell shaped distribution with a mean of 76.4 and a standard deviation of 6.1 points. We are asked to find the percentage of the data that is between 64.2 points and 88.6 points.
First of all, we will find z-scores of each data point as:
Let us find z-score corresponding to normal score 88.6.
To find the percentage of the data is between 64.2 points and 88.6 points, we need to find area under a normal distribution curve that lie within two standard deviation of mean.
The empirical rule of normal distribution states that approximately 95% of data points fall within two standard deviation of mean, therefore, option 'b' is the correct choice.