a household consumes 2100 KWh in one month. Compare the new tarrif for the 100KWh that exceed the 2000 units, with that of the previous book year. (consumption in KWh 2000+- 3000) (new tarrif = 40,61) (previous tarrif= 33,02)​

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;

1) 2/5

2) zero=0/1

3) zero=0/2

4) -4/5

5) undefined=3/0

thus, the first answer choice, y = sec x, is the correct one