Four students have summer jobs. The table shows how much each student earns after working a certain number of hours. Which stude
nt earns the highest hourly wage.
1 answer:
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Answer:
1)
The point estimate for the proportion of college graduates among women who work at home is 0.327
2)
The 80% confidence interval is given by (0.315; 0.339)
Step-by-step explanation:
For this case we have the following info given:
represent the women who worked at home who were college graduates
the sample size selected
Part 1
In order to find the proportion of college graduates among women who work at home and we can use the following formula:
The point estimate for the proportion of college graduates among women who work at home is 0.327
Part 2
Construct an 80% confidence interval for the proportion of women who work at home who are college graduates. Round the answer to three decimal places. An 80% confidence interval for the proportion of women who work at home Is < p <
The confidence interval for the true proportion would be given by this formula
For the 80% confidence interval the value for the significance is and
, the critical value would be given by:
And replacing we goot:
The 80% confidence interval is given by (0.315; 0.339)
When you set 
, you end up with the differentials 
. Multiplying both sides by 2 gives 
.
Then the integral is
Then the integral is