The stretch of a spring varies directly to the weight attached to it. A 45 pound weight stretches the spring 2.5 inches. Which of the following is the correct weight it would take to stretch the spring 7 inches? A. 17.5 lbs. B. 112.5 lbs. C. 126.0 lbs. D. 315.0 lbs

a

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;

and?

step-by-step explanation:

3000000000000000000000