Answer:
b
Step-by-step explanation:
Answer:
Step-by-step explanation:
Information given
n=370 represent the sample selected
estimated proportion of readers owned a laptop
is the value that we want to test
z would represent the statistic
represent the p value
Creating the hypothesis
We need to conduct a hypothesis in order to test if the true proportion of readers owned a laptop is different from 0.45, the system of hypothesis are:
Null hypothesis:
Alternative hypothesis:
The statistic is:
(1)
Replacing we got:
Calculating the p value
We have a bilateral test so then the p value would be:
Answer:
-(2x+1) ,6x-8x=-2x,+1-2=1
<u>Answer:</u>
106 items
<u>Step-by-step explanation:</u>
We know that:
revenues > costs
7.5x – 100 > 79.86 + 5.8x
7.5x - 5.8x > 79.86 + 100
1.7x > 179.86
x > 179.86 / 1.7
x > 105.8
This means that the company will need to sell at least 106 items (the smallest integer greater than 105.8) to make a profit.
The inequality which will determine the number of least items that need to be sold to make a profit is x ≥ 106