Mathematics, 05.05.2020 04:21, janeou17xn

Length of a rod: Engineers on the Bay Bridge are measuring tower rods to find out if any rods have been corroded from salt water. There are rods on the east and west sides of the bridge span. One engineer plans to measure the length of an eastern rod 25 times and then calculate the average of the 25 measurements to estimate the true length of the eastern rod. A different engineer plans to measure the length of a western rod 20 times and then calculate the average of the 20 measurements to estimate the true length of the western rod. Suppose the engineers construct a 90% confidence interval for the true length of their rods. Whose interval do you expect to be more precise (narrower)? Group of answer choices Both confidence intervals would be equally precise. The engineer who weighed the rod 25 times. The engineer who weighed the rod 20 times.

Answers: 2

Show answers

Other questions on the subject: Mathematics

Mathematics, 21.06.2019 19:00, amanda2517

To solve the system of equations below, pedro isolated the variable y in the first equation and then substituted it into the second equation. what was the resulting equation? { 5y=10x {x^2+y^2=36

Answers: 1

continue

Mathematics, 21.06.2019 20:00, 12bluestone

Someone answer asap for ! a discount store’s prices are 25% lower than department store prices. the function c(x) = 0.75x can be used to determine the cost c, in dollars, of an item, where x is the department store price, in dollars. if the item has not sold in one month, the discount store takes an additional 20% off the discounted price and an additional $5 off the total purchase. the function d(y) = 0.80y - 5 can be used to find d, the cost, in dollars, of an item that has not been sold for a month, where y is the discount store price, in dollars. create a function d(c(x)) that represents the final price of an item when a costumer buys an item that has been in the discount store for a month. d(c(x)) =

Answers: 1

continue

Mathematics, 21.06.2019 22:00, melody32

You buy 4 items that cost 2.69 14.45 8.05 13.95 what is the estimated total round to the nearest dollar

Answers: 1

continue

Mathematics, 21.06.2019 23:30, f13vsdbd

Select all expressions that are equivalent to 2(3x + 7y). question 1 options: 6x + 14y 6x + 7y 1(6x + 14y)

Answers: 3

continue

Do you know the correct answer?

Length of a rod: Engineers on the Bay Bridge are measuring tower rods to find out if any rods have b...