T+6>-4
T -6>-6
----------
T>-10
That is the answer
divide the total cost by the number of hinges:
Mark's hardware: $28 / 8 = $3.50 per hinge
Steve's Supply: $39 / 11 = $3.45 per hinge.
$3.45 is less than $3.50, so the answer would be C.
Answer:
The 95% confidence interval for the proportion of corporations preferring a nonsmoking candidate is (0.2328, 0.2872)
Step-by-step explanation:
In a sample with a number n of people surveyed with a probability of a success of
, and a confidence level of
, we have the following confidence interval of proportions.

In which
z is the zscore that has a pvalue of
.
For this problem, we have that:

95% confidence level
So
, z is the value of Z that has a pvalue of
, so
.
The lower limit of this interval is:

The upper limit of this interval is:

The 95% confidence interval for the proportion of corporations preferring a nonsmoking candidate is (0.2328, 0.2872)
Step by step in the picture