There are 12 pupils in a class. They are each asked whether they have a brother or a sister, 9 say they have a brother, 7 say they have a sister, 2 say they have neither. Fill in the venn diagram

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;

you would need to also lose 1 point for each of the other outcomes for it to be fair.

step-by-step explanation: