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
Mathematics, 20.06.2019 18:04
30 points! i am confused. what does it mean by game time? you can use a table of random numbers or a random number generator to create random samples. also, you can obtain random samples directly using wolframalpha.com. for example, typing in randomsample[{1,2,3,4,5},2] will give you a sample of size 2 from the list {1,2,3,4,5}. a sample result is {1,5}. refreshing the page will generate a new random sample of size 2. 2. create five random samples of size two from the population. record the game times for the samples and calculate the mean game time of each sample. 3. create 5 random samples of size 11 from the population. record the game times for the samples and calculate the mean game time of each sample.
Answers: 2
Mathematics, 21.06.2019 14:10
Plzzz plzz maths ! quadratic sequences =an^2+bn 1) 1,6,15,28,45 2)5,18,39,68,105 3) 1,8,21,40,65 4) 7,24,51,88,135 5) -1,2,9,20,35
Answers: 3
Mathematics, 21.06.2019 18:30
The base of a triangle exceeds the height by 9 inches. if the area is 180 square inches, find the length of the base and the height of the triangle.
Answers: 3
Mathematics, 21.06.2019 20:30
Which equation expression the relationship between the number of boxes b and the number of cans c and the proportion is 48
Answers: 1
In a certain supermarket, a sample of 60 customers who used a self-service checkout lane averaged 5....
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