Answer:
A. 0.0049
B. Yes
Step-by-step explanation:
Sample proportion = 0.64
N = 1000
Population proportion = 0.60
We solve for standard deviation
= √p(1-p)/n
= √0.60(1-0.60)/1000
= √0.60x0.40/1000
= √0.00024
= 0.0155
A.
The probability of sample >=0.64
Z>=0.64-0.60/0.0155
Z >= 0.04/0.0155
So z >= 2.5806
Using excel this equal to 0.0049
0.0049 is probability of sample proportion being 0.64 at least.
B.
This answer in a shows that than 60% of households in the united states income class purchased life insurance last year.
Answer:
The answer is A. .
Step-by-step explanation:
To find the difference of this problem, start by simplifying the denominator, which will look like . Next, multiply by to create a fraction with a common denominator in order to subtract from . The problem will now look like .
Then, simplify the terms in the problem by first multiplying and , which will look like . The next step is to combine the numerators over the common denominator, which will look like .
Next, simplify the numerator, and to simplify the numerator start by factoring 3 out of , which will look like . Then, subtract 14 from -7, which will look like . The final answer will be .
The correct answer is the last choice, the scenario about the paint brushes.
In this scenario x stands for the number of packs of five paintbrushes, and y stands for the number of packs of three paint brushes. This is shown in the first equation.
x plus y will give us 60 total packs of paint brushes which is shown in the second equation.
Answer:
37.5 minutes
Step-by-step explanation:
45+30=75
=<u>7</u><u>5</u><u> </u>=37.5
2
This might help you!!!!