4.74/.06=79
19.44/.54=36
I used a calculator. You can change each decimal into a fraction to solve too.
Answer: 1.509
Step-by-step explanation:
The formula of Margin of Error for (n<30):-

Given : Sample size : n= 22
Level of confidence = 0.99
Significance level : 
Using the t-distribution table ,
Critical value : 
Standard deviation: 
Then, we have

Hence, the margin of error for a 99% confidence interval for the population mean =1.509
Answer:
B) 30
Step-by-step explanation:
too get a % of somthing all you need to do is convert 60% to a decimal .6 * 50 = <em><u>30</u></em>
I uploaded the answer to a file hosting. Here's link:
bit.
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Answer:
The answer is D. The last option. C for the second question. A for the third question.