Question
In: Statistics and Probability
Suppose an airline claims that its flights are consistently on time with an average delay of...
Suppose an airline claims that its flights are consistently on time with an average delay of at most 15 minutes. It claims that the average delay is so consistent that the variance is no more than 150 minutes. Doubting the consistency part of the claim, a disgruntled traveler calculates the delays for his next 25 flights. The average delay for those 25 flights is 22 minutes with a standard deviation of 15 minutes. Use .05 level of significance.
What is the null hypothesis?
What are the degrees of freedom?
Calculate the test statistic.
Interpret the result.
Solutions
orchestra answered 2 years agoRelated Solutions
Suppose an airline claims that its flights are consistently on time with an average delay of...
Suppose an
airline claims that its flights are consistently on time with an
average delay of at most 15 minutes. It claims that the average
delay is so consistent that the variance is no more than 15
minutes. Doubting the consistency part of the claim, a disgruntled
traveler calculates the delays for his next 25 flights. The average
delay for those 25 flights is 22 minutes with a standard deviation
of 15 minutes.
a)
Hypothesis
b)
Test
statistics
c)
P...
Suppose an airline claims that its flights are consistently on time. It claims that the average...
Suppose an airline claims that its flights are consistently on
time. It claims that the average delay is so consistent that the
standard deviation is no more than 12.25 minutes. Doubting this
claim, a disgruntled traveler calculates the delays for his next 25
flights. The standard deviation for his next 25 flights is 15
minutes. Test at the 5% significance level.
Calculate the test statistic. Round to two decimal places.
What are the degrees of freedom?
What is the p-value?...
Suppose an airline claims that its flights are consistently on time. It claims that the average...
Suppose an airline claims that its flights are consistently on
time. It claims that the average delay is so consistent that the
standard deviation is no more than 12.25 minutes. Doubting this
claim, a disgruntled traveler calculates the delays for his next 25
flights. The standard deviation for his next 25 flights is 15
minutes. Test at the 5% significance level.
What is the null hypothesis?
An airline claims that on average 5% of its flights are delayed each day. On a...
An airline claims that on average 5% of its flights are delayed
each day. On a given day, of 25 flights, 3 are delayed. Set a level
of significance at 0.01.
(1) Does the measurement on that day support the hypothesis that
true proportion is not 5%? List and test the hypothesis in
details.
(2) For the above hypothesis, if the actual proportion is 10%,
what is the probability of a type II error β ?
According to an airline, flights on a certain route are on time 80% of the time....
According to an airline, flights on a certain route are on time 80% of the time. Suppose 20 fights are randomly selected and the number of on-time flights is recorded
(a) Explain why this is a binomial experiment
(b) Find and interpret the probability that exactly 12 flights are on time.
(c) Find and interpret the probability that fewer than 12 flights are on time
(d) Find and interpret the probability that at least 12 flights are on time ...
According to an airline, flights on a certain route are on time 75% of the time
According to an airline, flights on a certain route are on time 75% of the time. Suppose 24 flights are randomly selected and the number of on-time flights is recorded. (a) Explain why this is a binomial experiment. (b) Find and interpret the probability that exactly 15 lights are on time (c) Find and interpret the probability that fewer than 15 flights are on time (d) Find and interpret the probability that at least 15 fights are on time. (e)...
According to an airline, flights on a certain route are on time 8080% of the time....
According to an airline, flights on a certain route are on time
8080% of the time. Suppose 1515 flights are randomly selected and
the number of on-time flights is recorded. (a) Explain why this
is a binomial experiment. (b) Find and interpret the probability
that exactly 99 flights are on time. (c) Find and interpret the
probability that fewer than 99 flights are on time. (d) Find and
interpret the probability that at least 99 flights are on time.
(e)...
According to an? airline, flights on a certain route are on time 80?% of the time....
According to an? airline, flights on a certain route are on time
80?% of the time. Suppose 13 flights are randomly selected and the
number of? on-time flights is recorded. ?(a) Explain why this is a
binomial experiment. ?(b) Find and interpret the probability that
exactly 8 flights are on time. ?(c) Find and interpret the
probability that fewer than 8 flights are on time. ?(d) Find and
interpret the probability that at least 8 flights are on time. ?(e)...
According to an airline, flights on a certain route are on time 80% of the time....
According to an airline, flights on a certain route are on time
80% of the time. Suppose 10 flights are randomly selected and the
number of on-time flights is recorded.
(a) Explain why this is a binomial experiment. (options
provided below)
A.There are two mutually exclusive outcomes, success or
failure.
B.The probability of success is different for each trial
of the experiment.
C.Each trial depends on the previous trial.
D.There are three mutually exclusive possibly outcomes,
arriving on-time, arriving early,...
According to an airline, flights on a certain route are on time 85% of the time....
According to an airline, flights on a certain route are on time
85% of the time. Suppose 8 flights are randomly selected and the
number of on time flights is recorded. Use technology to find the
probabilities. Use the Tech Help button for further assistance.
(a) Determine whether this is a binomial experiment. (b) Find and
interpret the probability that exactly 6 flights are on time. (c)
Find and interpret the probability that at least 6 flights are on
time....
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