Answer:
2
Step-by-step explanation:
The frequency is how many times the score shows up in the data set
21,<u> 27</u>, 20, 29, 23, 21, 21, <u>27</u>, 26, 25
27 shows up 2 times so the frequency is 2
Answer: 1.2703
Step-by-step explanation:
Given : Sample size : n= 17, which is a small sample (n<30), so we use t-test.
Significance level : 
Then , Critical value : 
Standard deviation: 
The formula to find the margin of error : -

Hence, the error bound (EBM) of the confidence interval with a 90% confidence level.=1.2703
Answer:
1:15
Step-by-step explanation:
there are 120 quarters in 30 dollars
so 8:120
divide both by 8
1:15
1 and 18
2 and 9
3 and 6 or of you want the set
1,2,3,6,9,18
If the denominator of this fraction was 80, the numerator would have to be 44