We cannot calculate the confidence interval without the sample size. However, for the second question, the sample size needed would be 49.
The formula we use is

To find the z-score:
Convert 98% to a decimal: 0.98
Subtract from 1: 1-0.98 = 0.02
Divide by 2: 0.02/2 = 0.01
Subtract from 1: 1-0.01 = 0.99
Using a z-table (http://www.z-table.com) we see that this value is closest to a z-score of 2.33.
Using the z-score, our standard deviation (9) and our margin of error (3), we have:
It's very simple just divide 21.75 by five and that's your answer did you want me to do it?
Answer:
X=9
You divide 8 in each side and you will get x=9
Step-by-step explanation:
I'm sorry this is gauge is there anymore info
Answer:
లోటస్ సరస్సులు మరియు నదులలో పెరిగే మొక్క. పువ్వులు, విత్తనాలు, ఆకులు మరియు భూగర్భ కాండం (రైజోమ్) యొక్క భాగాలు make షధ తయారీకి ఉపయోగిస్తారు