The two-way table below describes feedback received by a hotel manager from past guests. In the table, j is the number of positive responses sent by e-mail and k is the number of negative comments made by phone. Customer Feedback Received in the Past Month Positive Negative E-Mail j 80 Phone Calls 36 k Comparing which two values tests whether the way feedback was submitted had an impact on whether or not feedback was positive?

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;

step-by-step explanation :

we know that

the measurement of the outer angle is the semi-difference of the arcs which comprises

in this problem

m< xzy is the outer angle

substitute the values

the measure of angle xoy is equal to

> by central angle

substitute the value

13cm

step-by-step explanation:

(apex)