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no-shows for a particular flight...

1.The following distribution list displays the number of no-shows for a particular flight and the historical probability that each number of no-shows will occur. A no-show is a person who has a reservation for a flight but fails to arrive prior to its departure. Complete parts a and b

No-Shows

Probability

a. Determine the mean number of no-shows for this flight.

nothing

(Type an integer or a decimal. Do not round.)

b. Determine the standard deviation for the number of no-shows for this flight.

nothing

(Type an integer or decimal rounded to two decimal places as needed.)2.A sports league introduced a video referee to review certain critical plays. However, the system has not been without its controversies. One particular unfortunate incident led to an outcry among fans. Nevertheless, a poll after this event found that % of fans were still in favor of the continued use of the video referee. Suppose the size of this sample was people. Complete parts a and b.

a. Estimate the true proportion of fans in favor of keeping the video referee using a % confidence interval.

The confidence interval has a lower limit of

nothing and an upper limit of

nothing.

(Round to three decimal places as needed.)

b. What is the margin of error for this sample?

The margin of error is

nothing.

(Round to three decimal places as needed.)3.At its peak after the 20072008 recession, credit card delinquency rates in a certain region reached %. Since its peak, delinquency rates have declined to a new low of % in the second quarter of . You are charged with checking the most recent credit card delinquency rates in the region. Using a random sample of credit card customers, you found that were at least days overdue on their monthly payments. Using a % confidence interval, can you conclude that the proportion of delinquent card holders changed since its lowest point in ?

The % confidence interval to estimate the actual most recent proportion of delinquent card holders has a lower limit of

nothing and an upper limit of

nothing.

(Round to three decimal places as needed.)

Based on the confidence interval, it

▼

cannot

can

be concluded that this proportion has changed since , because the

▼

the margin of error is less than the proportion from 2015.

confidence interval does not include zero.

the margin of error is less than zero.

confidence interval includes zero.

the margin of error is greater than the proportion from 2015.

confidence interval does not include the proportion from 2015.

confidence interval includes the proportion from 2015.

the margin of error is greater than zero.

No-Shows

Probability

a. Determine the mean number of no-shows for this flight.

nothing

(Type an integer or a decimal. Do not round.)

b. Determine the standard deviation for the number of no-shows for this flight.

nothing

(Type an integer or decimal rounded to two decimal places as needed.)2.A sports league introduced a video referee to review certain critical plays. However, the system has not been without its controversies. One particular unfortunate incident led to an outcry among fans. Nevertheless, a poll after this event found that % of fans were still in favor of the continued use of the video referee. Suppose the size of this sample was people. Complete parts a and b.

a. Estimate the true proportion of fans in favor of keeping the video referee using a % confidence interval.

The confidence interval has a lower limit of

nothing and an upper limit of

nothing.

(Round to three decimal places as needed.)

b. What is the margin of error for this sample?

The margin of error is

nothing.

(Round to three decimal places as needed.)3.At its peak after the 20072008 recession, credit card delinquency rates in a certain region reached %. Since its peak, delinquency rates have declined to a new low of % in the second quarter of . You are charged with checking the most recent credit card delinquency rates in the region. Using a random sample of credit card customers, you found that were at least days overdue on their monthly payments. Using a % confidence interval, can you conclude that the proportion of delinquent card holders changed since its lowest point in ?

The % confidence interval to estimate the actual most recent proportion of delinquent card holders has a lower limit of

nothing and an upper limit of

nothing.

(Round to three decimal places as needed.)

Based on the confidence interval, it

▼

cannot

can

be concluded that this proportion has changed since , because the

▼

the margin of error is less than the proportion from 2015.

confidence interval does not include zero.

the margin of error is less than zero.

confidence interval includes zero.

the margin of error is greater than the proportion from 2015.

confidence interval does not include the proportion from 2015.

confidence interval includes the proportion from 2015.

the margin of error is greater than zero.

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