Mathematics, 09.12.2021 22:40, ft2134

A simple random sample of 40 recorded speeds (in mi/h) is obtained from cars traveling on a section of Highway 805 in Los Angeles. The sample has a mean of 68.4 mi/h and a standard deviation of 5.7
mi/h (based on data from Sigalert). Use a 0.05 significance level to test the claim that the mean speed
of all cars is greater than the posted speed limit of 65 mi/h.

Answers: 2

Show answers

Other questions on the subject: Mathematics

Mathematics, 20.06.2019 18:04, ytalbot

In the football stadium, there are 18 empty seats out of 360 total seats. (1a) write the ratio of empty seats to total seats as a fraction in simplest form. (1b) then explain its meaning.

Answers: 1

continue

Mathematics, 21.06.2019 17:30, tnassan5715

What is the shape of the height and weight distribution

Answers: 2

continue

Mathematics, 22.06.2019 00:00, ivanmmmm

The construction of copying qpr is started below. the next step is to set the width of the compass to the length of ab. how does this step ensure that a new angle will be congruent to the original angle? by using compass take the measures of angle and draw the same arc according to it.

Answers: 2

continue

Mathematics, 22.06.2019 00:30, mercydiaz84

Measure a and b and find their sum. how are the angles related?

Answers: 3

continue

Do you know the correct answer?

A simple random sample of 40 recorded speeds (in mi/h) is obtained from cars traveling on a section...