Find the area under the standard normal curve to the right of z = 1.

The area under the standard normal curve to the right of z = 1 is 0.1587.

Step-by-step explanation:

Z-score:

In a set with mean and standard deviation , the zscore of a measure X is given by:

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X, which is also the area to the left of z. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X, which is also the area to the right of x.

Area to the right of z = 1.

1 subtracted by the pvalue of z = 1.

z = 1 has a pvalue of 0.8413

1 - 0.8413 = 0.1587

The area under the standard normal curve to the right of z = 1 is 0.1587.

She is absolutely correct .

Step-by-step explanation:

Given : Maxine spent 15 hours doing her homework last week.

This week she spent 18 hours doing homework.

i.e. Previous time period = 15 hours

New time period =18 hours

Then , the percentage of time she spent more will be:-

Hence she is absolutely correct , She spent 120% more time doing homework this week. I