A plant physiologist is planning to measure the stem lengths of soybean plants after 2 weeks ...

profileguru2009
 (Not rated)
 (Not rated)
Chat
Home>Homework Answsers>Mathematics homework help>Statistics homework help

  

A plant physiologist is planning to measure the stem lengths of soybean plants after 2 weeks of growth when using a new fertilizer. Previous experiments suggest that the standard deviation of stem length is around 1.2 cm. 

(a). how many soybean plants the researcher should have if she wants the 99% confidence interval to have width less than 0.5.

(b). how many soybean plants the researcher should have if she wants the 99% confidence interval to have margin of error than 0.3.

    • 8 years ago
    Report issue
    (a) σ = 1.2, width of the confidence interval = 0.5
    NOT RATED

    Purchase the answer to view it

    blurred-text