Mathematics, 23.04.2020 20:22, grace783

The mean amount for all of the invoices for your company last month is not known. Based on your past experience, you are willing to assume that the standard deviation of invoice amounts is about $260.

a. If you take a random sample of 100, what is the value of the standard deviation for x?
b. Using the 68-95-99.7 rule, the probability is about 0.997 that x is within what amount of the population mean µ?

Answers: 1

Show answers

Other questions on the subject: Mathematics

Mathematics, 21.06.2019 20:00, ElizabethF

Aball is dropped from a height of 10m above the ground. it bounce to 90% of its previous height on each bounce. what is the approximate height that the ball bounce to the fourth bounce?

Answers: 2

continue

Mathematics, 21.06.2019 21:00, itsdeevv

How many kilograms of a 5% salt solution and how many kilograms of a 15% salt solution must be mixed together to make 45kg of an 8% salt solution?

Answers: 3

continue

Mathematics, 21.06.2019 22:30, bobxspam

Varies inversely with x. if y=8.5 when x=-1 find x when y=-1

Answers: 1

continue

Mathematics, 21.06.2019 23:30, paolaf3475

Without multiplying, tell which product is larger and why. 5 × 1/3 or 5 × 2/3 a)5 × 1/3 because 1/3 is less than 2/3 b) 5 × 1/3 because 1/3 is greater than 2/3 c) 5 × 2/3 because 1/3 is less than 23 d) 5 × 23 because 1/3 is greater than 2/3

Answers: 1

continue

Do you know the correct answer?

The mean amount for all of the invoices for your company last month is not known. Based on your past...