Answer:
30% = 30/100 = 3/10
3 : 10
Step-by-step explanation:
1) The formula used for determining the confidence interval is
Sample mean +/- Critical value (or z-score corresponding to 90% confidence) * Standard
error of mean
8439 +/- 1.645 * 100/sqrt 25
8439 +/- 1.645 * 20
8439 +/- 32.9
2) The only difference in this case is finding the critical value i.e., z-score corresponding to 92% confidence which is 1.75 approximately
Then the confidence interval is
8439 +/- 1.75 * 100/sqrt 25
8439 +/- 1.75 * 20
8439 +/- 35
Lower limit is 8439 - 35 = 8404
The upper limit is 8439 + 35 = 8474
Answer:
simplify the <em><u>expre</u></em><em><u>ssion</u></em>
exact form :
5/36
decimal form :
0.138
Answer: x = 5/49 ; 0.102041
Step-by-step explanation:
- Subtract 5x on both sides. 25 = 245x
- Divide by 245 on both sides. x = 5/49. As a decimal, it is approximately 0.102041.
