Aset of data is normally distributed with a mean of 86 and a standard deviation of 1.5. what percent of the data is in the interval 86–87.5?

The correct answer is:

34%.

Explanation:

Using the empirical rule, we know that 68% of the data fall within 1 standard deviation of the mean.

The mean is 86 and the standard deviation is 1.5; this makes 1 standard deviation below the mean 86-1.5=84.5 and 1 standard deviation above the mean 86+1.5=87.5.

This means 68% of the data fall from 84.5 to 87.5.

However, we are only concerned with the interval 86-87.5; this is the interval 1 standard deviation above the mean.

Half of our 68% will fall within this range:

68/2 = 34%.

54 km / hours

step-by-step explanation:

we need to convert seconds to hours

60 seconds = 1 minutes

60 minutes = 1hour

15 m         60 second   60 minutes

  * *         = 54000 meters/ hour

second     1 minute             1 hour

now we need to convert meters to km

1000 m = 1 km

54000 m       1 km

*   = 54 km / hours

hour               1000m

the answer is (-8,-5)

step-by-step explanation:

the endpoint to midpoint is half the length. the length is (-2,-1) so when you are at the midpoint just add it to it to find your answer -6+(-2)= -8 and -4+(-1)=-5 so (-8,-5)