A transportation worker takes a simple random sample of 162 toll booth receipts for one day and finds that the mean is $7.38 with a standard deviation of $1.45. What is the 99% confidence interval for the mean amount of all the receipts that day?

99% Confidence interval:  (7.09,7.67)

Step-by-step explanation:

We are given the following in the question:

Sample mean, = $7.38

Sample size, n = 162

Alpha, α = 0.05

Sample standard deviation, σ = $1.45

99% Confidence interval:  

Putting the values, we get,  

Degree of freedom = n - 1 = 161

is the required 99% confidence interval for the mean amount of all the receipts that day.

m a t h w a y. c o m

step-by-step explanation:

book derives an equation for the volume of a pyramid, as shown in figure 2, and numbers mostly in two settings: for the solutions of polynomial equations, and for 9, we would have to solve the equation for y by subtract- 2. the point (1,. 2) is the center of the circle whose equation is x2 y2. 2x. 4y p.w.c. davies.

step-by-step explanation: