A) How large a sample must be drawn so that a 90% confidence interval for u will have a margin of error equal to 3.4? Round the critical value to no less than three decimal places.
Round the sample size up to the nearest integer.

A sample size of
is needed to be drawn in order to obtain a confidence interval with a margin of error equal to 3.4

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step-by-step explanation:

d. 24+-0.114

step-by-step explanation:

the question requires us to calculate the approximate 95% confidence interval for the mean number of ounces of ketchup per bottle in the sample given the following statistics;

sample mean = 24

standard deviation, σ = 0.4

sample size , n = 49

the confidence interval for a population mean is calculated using the formula;

sample mean ± z-score*(σ/sqrt(n))

the z-score associated with a 95% confidence interval, from the standard normal tables, is;

1.96

substituting these values into the formula;

24 ± 1.96*(0.4/7)

= 24 ± 0.112

from the alternatives given, choice d is closest to the above expression;

lo98765432wqasdfghjkloi87654567890

step-by-step explanation: