Mathematics, 02.04.2021 01:00 brianabrady06

The manager of an online shop wants to determine whether the mean length of calling time of its customers is significantly less than 9 minutes. A random sample of 28 customers was taken. The average length of calling time in the sample was 8.1 minutes with a standard deviation of 2.9 minutes. At a 0.05 level of significance, it can be concluded that the mean of the population is:

Answers: 3

Show answers

Another question on Mathematics

Mathematics, 21.06.2019 16:00

One card is dealt from a 52 card deck. find the probability that the dealt card is a 4 or a black 7

Answers: 2

Answer

Mathematics, 21.06.2019 18:30

Consider the function f(x)=-5x+3 what is f(-2)

Answers: 2

Answer

Mathematics, 21.06.2019 19:00

What is the value of x in the this question ?

Answers: 1

Answer

Mathematics, 21.06.2019 20:00

Which of the following is not a subset of {1,2,3}?

Answers: 2

Answer

You know the right answer?

The manager of an online shop wants to determine whether the mean length of calling time of its cust...

Questions

Mathematics, 23.06.2019 01:30

Michael rented a truck for one day. there was a base fee of $19.99 , and there was an additional charge of 88 cents for each mile driven. michael had...

History, 23.06.2019 01:30

Who tried to blow up the parliament in november 5, 1605? a. guy fawkes b. charles i c. puritans d. anne of denmark...

Mathematics, 23.06.2019 01:30

Determine the equation for the parabola graphed below

Mathematics, 23.06.2019 01:30

What is the greatest common factor of 42, 126, and 210 ?...

Physics, 23.06.2019 01:30

The first law of thermodynamics is as follows: ∆u=q-w , which means in a system is equal to added, minus done by the system. the units for these v...

Mathematics, 23.06.2019 01:30

Aparallelogram with an area of 160.5 in^2 has a height that meansures 7.5 in. find the length of the base....

Mathematics, 23.06.2019 01:30

Fifteen points, find the value of x. x=8 x=10 x=16 x=20

History, 23.06.2019 01:30

What two authors are connected with the new journalism movement?...

Mathematics, 23.06.2019 01:30

Which expression is equivalent to (x4/3 x2/3)^1/3?...

Physics, 23.06.2019 01:30

Match each type of lever with the correct diagram. 1. first-class 2. third-class 3. second-class...

Mathematics, 23.06.2019 01:30

West junior high needs to buy new fencing to go around its swimming pool. determine the amount of fencing it will need by finding the perimeter of the...

Physics, 23.06.2019 01:30

Each line (unit) on the horizontal axis represents: 5 years 10 years 20 years all of the above...

Social Studies, 23.06.2019 01:30

One result of recent migration trends is that the workforce in europe has become...

Mathematics, 23.06.2019 01:30

Simplify the radical expression below...

Spanish, 23.06.2019 01:30

Which part of this sentence is not correct? esta muchacha tan bonito es alta. a. muchacha b. bonito c. esta d. alta...

History, 23.06.2019 01:30

Which of the following countries mines most of the world’s opals? a. nauru b. papua new guinea c. new zealand d. australia not b...

Mathematics, 23.06.2019 01:30

In which table(s) does y vary directly with x? check all that apply....

Chemistry, 23.06.2019 01:30

In what way do investigations build scientific knowledge? the results of investigations lead to questions that cannot be tested. they reflect the opi...

Biology, 23.06.2019 01:30

Sarah and john are having a discussion on genetic diversity. sarah believes that it happen over a long period of time. john it happens immediately. wh...

Mathematics, 23.06.2019 01:30

Which figure. does not appear to be congruent to the figure below...

More questions: Mathematics Another questions