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jonathanmenosky11
05.05.2020 •
Mathematics
A yearbook company was investigating whether there is a significant difference between two states in the percents of high school students who order yearbooks. From a random sample of 150 students selected from one state, 70 had ordered a yearbook. From a random sample of 100 students selected from the other state, 65 had ordered a yearbook. Which of the following is the most appropriate method for analyzing the results?
A. A one-sample zz-test for a sample proportion
B. A one-sample zz-test for a population proportion
C. A two-sample zz-test for a difference in sample proportions
D. A two-sample zz-test for a difference in population proportions
E. A two-sample zz-test for a population proportion
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Ответ:
Null hypothesis:![p_1 = p_2](/tpl/images/0636/0505/c8d2d.png)
Alternative hypothesis:![p_1 \neq p_2](/tpl/images/0636/0505/70faf.png)
So we need to conduct a:
D. A two-sample z-test for a difference in population proportions
Because the idea is to check if the population proportions in the states are similar or not.
Step-by-step explanation:
For this case they are trying two proof if there is a significant difference between two states in the percents of high school students who order yearbooks, and we chan check this with the difference of proportions.
Lets say that
are the two proportions of interest and we want to check the following hypothesis:
We have the following info given:
Null hypothesis:![p_1 = p_2](/tpl/images/0636/0505/c8d2d.png)
Alternative hypothesis:![p_1 \neq p_2](/tpl/images/0636/0505/70faf.png)
So we need to conduct a:
D. A two-sample z-test for a difference in population proportions
Because the idea is to check if the population proportions in the states are similar or not.
Ответ:
Step-by-step explanation:
fill up
1. 196
2. 625
3 . 429