In response to an inquiry from its national office, the manager of a local bank has stated that her bank's average service time for a drive-through customer is93 seconds. A student intern working at the bank happens to be taking a statistics course and is curious as to whether the true average might be some value other than 93 seconds. The intern observes a simple random sample of 50 drive-through customers whose average service time is 89.5 seconds, with a standard deviation of 11.3 seconds. From these sample results, and using the 0.05 level of significance, what conclusion would the student reach with regard to the bank manager's claim?

Q: What is the area of this figure? 20 mi 7 mi 13 mi 3 mi 7 mi 3 mi 4 mi 10 mi Write your answer using…

A:

Q: Selve du 4824 8.

A: Given heat equation, ∂u∂t=4∂2u ∂x2u(0,t)=0u(8,t)=0u(x,0)=4x-12x2=f(x,y)  Here length l=8 and c2=4

Q: Let f(z)= z* –4z° +11z? -14z+10. Given that 1+i is a zero of f, find the other zeros of f.

A:

Q: sorry can you write it out in pen or pencil please

A: Given that We have to find a ..Mean b..Standard deviation c...Tally Chart

Q: Solve for x. Зх + 5 5x +2 8x + 8c 5x + 10 4x+ 15

A: Solve for X?

Q: २५१ 0,25%- %3D ().

A:

Q: x*Arcsinxe

A: we have to find

Q: Differentiate. y = 7+ x

A: Given Expression : y=x7+x y=x7+x-1 Differentiate by using Product Rule…

Q: also answer letter c. thank you

A:

Q: 1 is subtracted from the cube of a number

A: 1 is subtracted from the cube of a number.Let the number be xSo, we have1 is subtracted from the…

Q: CD A =

A: We have to manipulate the given function.

Q: Please hand write it out

A: Given figure:- y=2sin(x) √(1+cos(x))

Q: Table 14 Climate Data for the Contiguous United States Year 1965 1975 1985 1995 2005 2015 Average…

A: The regression is performed to fit a dataset into a function of the form: y=f(x). The linear…

Q: can you please answer number 7 and show you did the work.

A:

Q: tions are half cut out due to the website's formatting. Could you attach a picture of your work?…

A: The instructor shoots free throws  on a basketball court. The instructor hits the first and misses…

Q: Express the quantity S².

A:

Q: dx cot 2x cos 2x 4,

A:

Q: I can't read your handwriting. What is the number with a line through it

A:

Q: Explain and verify letter B again.

A: Given: Let C be the curve obtained from the intersection of the surface S1 and the xz-plane. To…

Q: Please allof them.Thanks

A: 1) The mean is calculated as follows: x¯=20+11+20+11+165=785=15.6

Q: 3. Set up an integral (do not evaluate) that represents the area of the region that lies inside the…

A: We have to set up the integral to find the area.

Q: j + 28.6 = 43

A:

Q: 15) L (nx)* dx

A:

Confidence Intervals

When we calculate intervals in probability and statistics, it can be simply termed as finding out a confidence interval. The confidence interval is usually calculated from the data set which is observed. The value of the parameter that needs to be calculated is present here only.