Many medical professionals believe that eating too much red meat increases the risk of heart disease and cancer (webmd website, march 12, 2014).

suppose you would like to conduct a survey to determine the yearly consumption of beef by a typical american and want to use 3 pounds as the desired margin of error for a 99% confidence interval of the population mean amount of beef consumed annually.
use 25 pounds as a planning value for the population standard deviation.

how large a sample should be taken?

461

Step-by-step explanation:

Formula to find the sample size is given by :-

, where n is the sample size , is the population standard deviation and is the two tailed test value of z for significance level ().

Given :

Margin of error : 3 pounds

Confidence level = 99%

Significance level :

Critical value :

Then, the required minimum sample size would be :-

Hence, the required minimum sample size = 461

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step-by-step explanation:

14 ft 7 inches

step-by-step explanation:

since each model inch corresponds to 25 real inches, 7 model inches will correspond to

7×25" = 175"

at 12" per foot, that is 14 feet, 7 inches.