Here are 10 test scores: 30, 74, 76, 77, 78, 79, 80, 80, 82, 84. the mean of these scores is 74.

does this set have an outlier and, if so, how does removing it affect the mean?

a.
the set has 30 as an outlier and removing it decreases the mean by about 10.

b.

this data set has no outliers.

c.
the set has 30 as an outlier and removing it increases the mean by about 5.

d.
the set has 30 as an outlier and removing it decreases the mean by about 5.

d. millimeters per hour.

step-by-step explanation:

we are given that,

carlo used a rain gauge to measure the amount of water his lawn is receiving from the sprinklers.

since, according to the options, we see that,

water cannot be measured by 'miles per hour', 'meters per second' and 'grams per seconds'.

we get that, the water can be measured by 'millimeters per hour'.

hence, the appropriate rate for describing the amount of water is 'millimeters per hour'.