The state fair is a popular field trip destination. This year the senior class at Denham and the senior class at Walker both planned trips there. The senior class at Denham rented and filled 8 vans and 9 buses with 240 students. Walker rented and filled 4 vans and 1 bus with 54 students. Every van had the same number
of students in it as did the buses. What two equations could be used to represent this scenario?

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;

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