Answer:
The sample size 'n' = 26
Step-by-step explanation:
<u><em>Explanation</em></u>:-
Given a researcher wishes to estimate within $5 the average repair cost of for a refrigerator
Given estimate "E" = $5
<em>The estimate within the average is determined by</em>
<em> </em>
<em></em>
<em> Level of significance ∝ = 90 % or 10% </em>
<em> = 0.90 or o.10</em>
<em>Z₀.₁₀ = 1.645</em>
√n = 
Squaring on both sides , we get
n = 26
<u><em>Conclusion</em></u>:-
<em>The sample size 'n' = 26</em>
Answer:
The infant mortality rate in Korea based on equality provided is:
Step-by-step explanation:
Since the text mentions that the infant mortality rate in Korea is equal to the criminal success rate, the two expressions must equalize and clear the variable m, which is the rate in each of the expressions:
- 7 (m + 3) - 2 = 8m + 17.2
- 7m + 21 - 2 = 8m + 17.2
- 7m + 19 = 8m + 17.2
- 19 - 17.2 = 8m - 7m
- <u>1.8 = m</u>
As you can see, once the equality of the expressions is solved, <u>a rate of 1.8 is obtained</u>.
Answer:
For every 7 books Ethan read, Sadie read 3 books.
Step-by-step explanation:
For every 21 books Ethan read, Sadie read 9 books.
Unsimplified Ratio = 21:9
21 and 9 have a common factor of 3.
Because 21 and 9 share a common factor we can simplify the ratio
21 / 3 = 7
9 / 3 = 3
The new ratio is 7 to 3
So for every 7 books Ethan read, Sadie read 3 books.
