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We want to estimate the mean weight of all 7th grade boys in a city. It...

We want to estimate the mean weight of all 7th grade boys in a city. It is not known whether the distribution of the weights is normal or not. Suppose we have a random sample of 25 boys from 7th grade from that city and suppose the mean weight of these 25 boys is 50 Kilograms and the standard deviation is 5.6 kilograms. What is the 99% confidence interval for the mean weight (in Kilograms) of all boys in 7th grade in that city?

50 ± 2.787*5.6/5

50 ± 2.797*5.6/5

50 ± 2.492*5.6/5

50 ± 2.485*5.6/5

None of the above

math   Statistics-And-Probability   
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Answer #1

. 9tven that. A randem Samp 2boys sample mean weight 여 25boys i, k s. mean weight- of ai 99% confiance aur val -for วั to.ot, n-l vn crtca value l t at o.ol tauet o 25 56

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