An article presents a study of the effect of the subbase thickness on the amount of surface deflection caused by aircraft landing on an airport runway. In six applications of a 160 kN load on a runway with a subbase thickness of 864 mm, the average surface deflection was 2.34 mm with a standard deviation of 0.090 mm. Find a 90% confidence interval for the mean deflection caused by a 160 kN load. Round the answers to three decimal places. The 90% confidence interval is ( , ).

The answer is below

Step-by-step explanation:

The z score is used to determine by how many standard deviations the raw score is above or below the mean.

Given that: sample size (n) = 6, standard deviation (σ) = 0.09 mm, mean (μ) = 2.34 mm

The confidence interval = 90% = 0.9

α = 1 - 0.9 = 0.1

α / 2 = 0.05

The z score of 0.05 is the same as the z score of 0.45 (0.5 - 0.05) which is 1.645.

The margin of error is given as:

The confidence interval = μ ± E = 2.34 ± 0.06 = (2.28, 2.40)

The confidence interval is between 2.28 mm and 2.4 mm

i think it might be a but you might want a second opinion

(0,,,0)

step-by-step explanation:

the table of x and y values is shown in the attached pic(part of question)

we have to decide according that graph

given points are (0, 0) (–1, 0), (2, 0)

when we graph these points on graph they show an increasing line as shown in the attached pic