Mathematics, 02.12.2019 18:00 robert7248

# Refer to the accompanying data display that results from a sample of airport data speeds in mbps. complete parts (a) through(c) below.

tinterval

(13.046, 22.15)

x = 17.598

sx = 16.01712719

n = 50

a. express the confidence interval in the format that uses the "less than" symbol. given that the original listed data use one decimal place, round the confidence interval limits accordingly. round to two decimal places as needed.

b. identify the best point estimate of μ and the margin of error.

c. in constructing the confidence interval estimate of μ, why is it not necessary to confirm that the sample data appear to be from a population with a normaldistribution?

a. because the sample standard deviation is known, the normal distribution can be used to construct the confidence interval.

b. because the sample is a random sample, it can be assumed that the sample mean is from a population with a normal distribution.

c. because the population standard deviation is known, the normal distribution can be used to construct the confidence interval.

d. because the sample size of 50 is greater than 30, it can be assumed that the sample mean is from a population with a normal distribution.

Answers: 2

Mathematics, 04.02.2019 02:08

Kayla has a $500 budget for the school party.she paid $150 for the decorations.food will cost $5.50 per student. what inequality represents the number of students,s, that can attend the party?

Answers: 1

Mathematics, 03.02.2019 06:21

According to the survey, the third largest purchase of an american consumer is

Answers: 3

Mathematics, 03.02.2019 02:02

In an improper fraction, is the numerator equal to, less than, or greater than the denominator

Answers: 2

Refer to the accompanying data display that results from a sample of airport data speeds in mbps. co...

Biology, 19.03.2020 02:57

Mathematics, 19.03.2020 02:57