Answer:
1) Increase the sample size
2) Decrease the confidence level
Step-by-step explanation:
The 95% confidence interval built for a sample size of 1100 adult Americans on how much they worked in previous week is:
42.7 to 44.5
We have to provide 2 recommendations on how to decrease the margin of Error. Margin of error is calculated as:
Here,
is the critical z-value which depends on the confidence level. Higher the confidence level, higher will be the value of critical z and vice versa.
is the population standard deviation, which will be a constant term and n is the sample size. Since n is in the denominator, increasing the value of n will decrease the value of Margin of Error.
Therefore, the 2 recommendations to decrease the Margin of error for the given case are:
- Increase the sample size and make it more than 1100
- Decrease the confidence level and make it lesser than 95%.
Answer: c=36
Step-by-step explanation: c/4-5=4
Add 5 to 4
c/4=9
9 divided by 1/4
C= 36
Answer:
15.15
Step-by-step explanation:
Divide 15 by 0.99
Answer:
8.03
Step-by-step explanation:
The answer can be any number of things, as long as the second number after the decimal point is a three. from left to right it goes tenths place, hundredths place, then thousandths place and so on.
I hope this helps!
Your two equations would be:
150 = x + y
2560 = 20x + 12y
after solving,
95 for $20
55 for $12