2. below is a table that shows the data of students who dressed
up or dressed normally by class during spirit week. answer the
following questions and show your work: (a) what is the
marginal distribution for students who dressed for spirit week?
(b) if the students dressed normally, determine the distribution
of sophomores. remember to show your work! *

6 spoons of sugar for every 21 cups of flour

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;