Mark and Phil have different phone services fields texting is described by Y = 0.0 3X +5 and the cost of marks texting as shown in the table. calculate how much Phil save mark after sending 50 texts

the answer on e2020 is

10

4/5

3/5

4/3

step-by-step explanation:

stethere all not eveanp-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;

44

step-by-step explanation:

the