A random sample of the price of gasoline from 40 gas stations in a region gives an average price of $3.69 and sample standard deviation 0.25$. Construct a 95% Confidence Interval for the mean price of regular gasoline in that region A. (3.61, 3.77) B. (3.09, 4.29) C. (2.79, 4.59) D. (3.39, 3.99)

95% Confidence Interval for the mean price of regular gasoline in that region

(3.61005, 3.76995)

Step-by-step explanation:

Step(i):-

Given sample size 'n' =40

mean of the sample x⁻ = 3.69 $

standard deviation of the sample "s' = 0.25 $

We will use students 't' distribution

degrees of freedom

ν = n-1 = 40-1 =39

Step(ii):-

95% Confidence Interval for the mean price of regular gasoline in that region

(3.69 - 0.07995 , 3.69 + 0.07995)

(3.61005, 3.76995)

Final answer:-

95% Confidence Interval for the mean price of regular gasoline in that region

(3.61005, 3.76995)

d) 48

step-by-step explanation:

16,32,48,64,80,96,112,128,144,160,176,192,208,224,240,256,272,288,304,320,336

i believe the correct answer is option 4.principalities were small territories that were run by russian rulers.

which statement correctly defines principalities in northern asia in the 1200s? principalities were small territories that were run by russian rulers.

hope i could ! : )