You are testing the claim that the mean gpa of night students is greater than the mean gpa of day students. you sample 60 night students, and the sample mean gpa is 2.23 with a standard deviation of 0.5 you sample 55 day students, and the sample mean gpa is 2.33 with a standard deviation of 0.62 calculate the test statistic, rounded to 2 decimal places

t= -0.95

Step-by-step explanation:

Given : You are testing the claim that the mean GPA of night students is greater than the mean GPA of day students.

Let and are the mean GPA of night students and mean GPA of day students respectively.

Then, Claim :

Test statistic for difference between two population mean :

, where

= sample standard deviations from population 1 and 2.

= difference in two sample means.

= sample standard deviations from population 1 and 2.

As per given , we have

Test statistic :

Hence, the test statistic : t= -0.95

you need to add a picture

answer: the sun

explanation:

water cycle describes the evaporation of water from earth's surface, formation of clouds and precipitation water back onto the surface of earth. seventy percent of the earth is covered with water in the form of seas and oceans. the heat of the sun causes the evaporation of water from the surface of the ocean. the water vapors rise and condense to form water droplets. the collection of these water droplets form clouds which rain down again.

the evaporation of the oceans surface water as part of the water cycle is caused by the sun