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  3. 1. express the confidence interval (35%,42%) in th

1. Express the confidence interval (35%,42%) in the form of p±ME. % ± % 2. You are a researcher studying...

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Statistics

1. Express theconfidence interval (35%,42%) in the form of p±ME.

% ± %

2.

You are a researcherstudying the lifespan of a certain species of bacteria. Apreliminary sample of 35 bacteria reveals a sample mean of x=70hours with a standard deviation of s=4.2 hours. You would like toestimate the mean lifespan for this species of bacteria to within amargin of error of 0.45 hours at a 98% level of confidence.

What sample sizeshould you gather to achieve a 0.45 hour margin of error? Roundyour answer up to the nearest whole number.

n = bacteria

If you can kindlyanswer both questions please I would really appreciate it. I haveposted these questions several times and keep getting the wronganswers. Thank you so much

Answer & Explanation Solved by verified expert
4.5 Ratings (679 Votes)
Question 1 p sample proportion p and ME margin of errorP Population proportionThe confidence interval for population proportion is givenby35    See Answer
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