Mathematics, 02.01.2021 01:30 dontrailgrant98

A special bumper was installed on selected vehicles in a large fleet. The dollar cost of body repairs was recorded for all vehicles that were involved in accidents over a 1-year period. Those with the special bumper are the test group and the other vehicles are the control group, shown below. Each "repair incident" is defined as an invoice (which might include more than one separate type of damage). Statistic Test Group Control Group Mean Damage X1 = $ 1,245 X2 = $ 1,790 Sample Std. Dev. S1 = $ 721 S2 = $ 835Repair Incidents n1 = 17 n2 = 14 Source: Unpublished study by Thomas W. Lauer and Floyd G. Willoughby. A) Construct a 99 percent confidence interval for the true difference of the means assuming equal variances. B) Repeat part (a), using the assumption of unequal variances with Welch's formula for d. f.C) Did the assumption about variances change the conclusion? D) Construct separate 99% confidence intervals for each mean.

Answers: 3

Show answers

Another question on Mathematics

Mathematics, 21.06.2019 15:00

Use the graph to determine the range. which notations accurately represent the range? check all that apply. (–∞, 2) u (2, ∞) (–∞, –2) u (–2, ∞) {y|y ∈ r, y ≠ –2} {y|y ∈ r, y ≠ 2} y < 2 or y > 2 y < –2 or y > –2

Answers: 1

Answer

Mathematics, 21.06.2019 23:00

1. an economy consists of three workers: larry, moe, and curly. each works 10 hours a day and can produce two services: mowing lawns and washing cars. in an hour, larry can either mow one lawn or wash one car; moe can either mow one lawn or wash two cars; and curly can either mow two lawns or wash one car. a. calculate how much of each service is produced under the following circumstances: a. all three spend all their time mowing lawns. b. all three spend all their time washing cars. c. all three spend half their time on each activity d. larry spends half of his time on each activity, while moe only washes cars and curly only mows lawns b. using your answers to part a, draw a production possibilities frontier and label points a, b, c, and d on your graph. explain why the production possibilities frontier has the shape it does. c. are any of the allocations calculated in part a inefficient? explain.

Answers: 3

Answer

Mathematics, 22.06.2019 00:20

Given: jk ||lm prove: _2 = 27 statement justification 1. jk ||lm 1. given 2.26 = 27 3.22 = 26 2. 3. 4. _2 = 27 4. corresponding angles theorem transitive property of equality vertical angles theorem substitution property of equality

Answers: 1

Answer

Mathematics, 22.06.2019 03:40

What is the following sum in simplest form? square root 8 + 3 square root 2 + square root 32

Answers: 1

Answer

You know the right answer?

A special bumper was installed on selected vehicles in a large fleet. The dollar cost of body repair...

Questions