Answer:
628
Step-by-step explanation:
We have the standard deviation of the sample, so we use the t-distribution to solve this question.
The first step to solve this problem is finding how many degrees of freedom, we have. This is the sample size subtracted by 1. So
df = 12 - 1 = 11
95% confidence interval
Now, we have to find a value of T, which is found looking at the t table, with 11 degrees of freedom(y-axis) and a confidence level of
. So we have T = 2.2
The margin of error is:

In which s is the standard deviation of the sample and n is the size of the sample.
The lower end of the interval is the sample mean subtracted by M. So it is 665 - 37 = 628 hours.
The answer is 628
Answer: 36 beans
Step-by-step explanation:
Make a proportion
For every 100 beans, 8 are damaged
8/100
For every 450 brand, x are damaged
x/450
Set the expressions equal to each other
8/100=x/450
100x=3600
Divide by 100 on both sides
x=36
So, out of 450 beans, 36 should be damaged
Hope this helped! :)
Answer:
Loss = $ 4.75
Step-by-step explanation:
Loss = cost price -selling price
You bought a book will be cost price and when u r selling it it will be selling price
loss = 8-3.25
= 4.75
Loss = $ 4.75
Answer:
3.8 Gallongs
Step-by-step explanation:
15.2/4
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