Has the recent drop in airplane passengers resulted in better on-time performance? Before the recent downturn one airline bragged that 92% of its flig

Yasmin 2021-05-01 Answered
Has the recent drop in airplane passengers resulted in better on-time performance? Before the recent downturn one airline bragged that 92% of its flights were on time. A random sample of 165 flights com- pleted this year reveals that 153 were on time. Can we conclude at the 5% significance level that the airline’s on-time performance has improved?
You can still ask an expert for help

Expert Community at Your Service

  • Live experts 24/7
  • Questions are typically answered in as fast as 30 minutes
  • Personalized clear answers
Learn more

Solve your problem for the price of one coffee

  • Available 24/7
  • Math expert for every subject
  • Pay only if we can solve it
Ask Question

Expert Answer

toroztatG
Answered 2021-05-03 Author has 98 answers
Here we have follwoing information:
n=165,p^=153165=0.927
Hypotheses are:
H0:p=0.92
Ha:p>0.92
Standard deviation of the proportion is:
σ=p(1p)n=0.92(10.92)165=0.0211
Test statistics will be:
z=p^pσ=0.9270.920.0211=0.33
Alternative hypothesis shows that the test is right tailed so p-value of the test is
P(z > 0.33) = 0.3707
Since p-value of the test is greater than 0.05 so we fail to reject the null hypothesis at 0.05 level of significance. So based on this sample, there is no support for the claim that the airline’s on-time performance has improved.
Not exactly what you’re looking for?
Ask My Question

Expert Community at Your Service

  • Live experts 24/7
  • Questions are typically answered in as fast as 30 minutes
  • Personalized clear answers
Learn more

Relevant Questions

asked 2021-02-04

A 17.8 kg flood light in a park is supported at the end of a horizontal beam of negligible mass that is hinged to a pole. A cable connected to the beam helps to support the light. (In thefigure, θ = 34.2 degrees. Find (A) The tension in the cable and (B) the horizontal and (C) vertical forces exerted on the beamby the pole.
image
(A) 320 N
(B) 250 N
(C) 0

asked 2020-12-25

An Alaskan rescue plane drops a package of emergency rations to a stranded party of explorers. the plane is traveling horizontally at 30.0m/s at a height of 200.0m above the ground.

A)What horizontal distance does the package fall before landing?

B)Find the velocity of the package just before it hits the ground.

asked 2021-03-20
Find the tension in each cord in Figure if the weight ofthe suspended object is w.
a)
b)
asked 2020-11-05
A 292 kg motorcycle is accelerating up along a ramp that is inclined 30.0° above the horizontal. The propulsion force pushing the motorcycle up the rampis 3020 N, and air resistance produces a force of 250 N that opposes the motion. Find the magnitude of the motorcycles
asked 2021-12-13
state how many linear factors each polynomial has: My school is literally screwing me over please frickin help f(x)= (x^16) +72 (x^6) + x = 0
asked 2021-11-15

Discuss the continuity of the function
f(x)={x23xif x<22x+4if x2
on the open interval 0<x<2 and on the closed interval 0x2

asked 2021-12-12
A monoprotic acid, HA, is dissolved in water: The equilibrium concentrations of the reactants and products are [HA] = 0.160 M [H] = 4.00

Solve your problem for the price of one coffee

  • Available 24/7
  • Math expert for every subject
  • Pay only if we can solve it
Ask Question