Mathematics
Mathematics, 05.11.2019 22:31, durham953

The mean checkout time in the express lane of a large grocery store is 2.7 minutes, and the standard deviation is 0.6 minutes. the distribution of checkout times is non-normal (for one thing, it can be a lot longer than 2.7 minutes, but it can only be so short). (a) what is the probability that a randomly-selected customer will take less than 3 minutes?

answer
Answers: 1
Show answers

Similar questions

Предмет
Mathematics, 25.07.2019 20:00, Vampfox
The manager of a grocery store has taken a random sample of 100 customers. the average length of time it took these 100 customers to check out was 3.0 minutes. it is known that the standard deviation of the population of checkout times is one minute. the 95% confidence interval for the true average checkout time (in minutes) is
Answers: 1
continue
Предмет
Mathematics, 01.08.2019 05:20, tcchef6
In a certain supermarket, a sample of 60 customers who used a self-service checkout lane averaged 5.2 minutes of checkout time, with a standard deviation of 3.1 minutes. a sample of 72 customers who used a cashier averaged 6.1 minutes with a standard deviation of 2.8 minutes. (a) can you conclude that the mean checkout time is less for people who use the self-service lane? (b) can you conclude that if everyone used the self-service lane, that the mean checkout time would decrease? consider the number of items checked out when formulating your answer.
Answers: 3
continue
Предмет
Mathematics, 26.09.2019 22:30, jasmin2344
In a certain supermarket, a sample of 60 customers who used a self-service checkout lane averaged 5.1 minutes of checkout time, with a standard deviation of 3.1 minutes. a sample of 72 customers who used a cashier averaged 6.1 minutes with a standard deviation of 2.7 minutes. can you conclude that the mean checkout time is less for people who use the self-service lane?
Answers: 3
continue
Предмет
Mathematics, 10.11.2019 05:31, lapointayyy6388
The mean checkout time in the express lane of a large grocery store is 2.7 minutes, and the standard deviation is 0.6 minutes. the distribution of checkout times is non-normal (for one thing, it can be a lot longer than 2.7 minutes, but it can only be so short). (a) what is the probability that a randomly-selected customer will take less than 3 minutes? 0.3085 0.6915 it cannot be determined from the information given. (b) what is the probability that the average time of two randomly-selected customers will take less than 3 minutes? 0.7611 0.2389 it cannot be determined from the information given. a (c) the probability that the average time of 64 randomly-selected customers will take less than 2.8 minutes is. (d) the probability that the average time of 81 randomly-selected customers will take less than 2.8 minutes is. (e) the probability that the average time of 225 randomly-selected customers will take less than 2.8 minutes is. (f) the probability that the average time of 400 randomly-selected customers will take less than 2.8 minutes is.
Answers: 2
continue
Do you know the correct answer?
The mean checkout time in the express lane of a large grocery store is 2.7 minutes, and the standard...

Questions in other subjects:

Konu
Mathematics, 20.03.2020 20:58
By some estimates, twenty-percent (20%) of Americans have no health insurance. Randomly sample n = 15 Americans. Let X denote the number in the sample with no health insurance. (a)...
Konu
Business, 20.03.2020 20:58
Suppose a nation has a labor force of 45.5 million workers and an unemployment rate of 6.15%. Instructions: Round your answers to two decimal places. a. How many workers in this na...
Konu
Mathematics, 20.03.2020 20:58
Juana baked 150 cookies for the bake sale and ate 10% of them. How many cookies did Juana eat?...
Konu
Business, 20.03.2020 20:58
1) The operations of Ranger Corporation are divided into the Stargate Division and the Cosmos Division. Projections for the next year are as follows: Stargate Division Cosmos Divis...
Konu
Business, 20.03.2020 20:58
1. ) The of an excise tax depends on the of the taxed good's supply and demand curves. First Blank Options: Frequency. Rate. Incidence. Administrative Costs.
Konu
Physics, 20.03.2020 20:58
A solid metallic sphere of radius a carries total charge Q. No other charges are nearby. The electric field just outside its surface is keQ/a^2 radially outward. At this close poin...
Konu
Mathematics, 20.03.2020 20:58
Which expression is equivalent to x+11A.11x B. 11+xC 11-xD.-x+11...
Konu
Mathematics, 20.03.2020 20:58
What is the distance from A to D on the graph?...
Konu
Social Studies, 20.03.2020 20:59
Two years after Elicia Jolie moves into her first home, a cozy two-bedroom near Lake Tahoe, she decides to buy all new kitchen appliances. Her brother, Jake Jolie, is the owner of...
Konu
Mathematics, 20.03.2020 20:59
When the movie is half over, popcorn sells for half price. Which expression can be used to determine the new cost for 3 orders of popcorn and 3 drinks?...
Other tasks in the category: Mathematics More task
See results (0)