# Statistics

An airline reports that if has been experiencing a 15% rate of no-shows on advanced reservations. Among 150 advanced reservations, find the probability that there will be fewer than 20 no-shows.

1. 👍 0
2. 👎 0
3. 👁 1,588
1. Mean = np = 150 * .15 = ?

Standard deviation = √npq = √(150 * .15 * .85) = ?

Note: q = 1 - p

I'll let you finish the calculations.

Once you have the mean and standard deviation, use z-scores:
z = (x - mean)/sd
Note: x = 20

After you calculate z, check a z-table to find your probability. (Remember that the problem is asking for "fewer than 20" when you check the table.)

I hope this will help get you started.

1. 👍 0
2. 👎 3

## Similar Questions

1. ### probability

For any given flight, an airline tries to sell as many tickets as possible. Suppose that on average, 10% of ticket holders fail to show up, all independent of one another. Knowing this, an airline will sell more tickets than there

2. ### calculus

With x people on board, a South African airline makes a profit of (1104 − 3 x) rands per person for a specific flight. A. How many people would the airline prefer to have on board? Answer: x= B. What is the maximum number of

3. ### Social studies

1. identify the process by which a highly developed populations rate of growth will stabilize. a mortality rate******* b urbanization c demographic transition 2. according to speculation instead of you, what will happen to the

4. ### Social studies

Which of the following do the conflicts in both Darfur and Rwanda illustrate? A. The environmental issues many African nations are experiencing. B. The problems some African nations are facing as a result of colonialism. C. The

1. ### Math

For any given flight, an airline tries to sell as many tickets as possible. Suppose that on average, 20% of ticket holders fail to show up, all independent of one another. Knowing this, an airline will sell more tickets than there

2. ### History

How is reservation life least like life off the reservation? Reservations do not have public schools. Most people living on reservations are Native Americans.************ Only traditional architecture is permitted on most

3. ### Statistics Question

Consumer Reports rated airlines and found that 80% of flights involved in the study arrived on time (that is, within 15 minutes of scheduled arrival time). Assuming that the on-time rate is representive of the entire commercial

4. ### Economics

An airline has a low marginal cost per passenger of \$30 on a route from Boston to Detroit. At the same time the typical fare charged is \$300. The planes that fly the route are usually full, yet the airline claims that is loses

1. ### History

1. What is one benefit of reservation life for Native Americans? A. They have access to many Native American employers B. They have the freedom to have some self-government*** C. They have special boarding school for their

2. ### Statistic

An airline experiences a no-show rate of 6%. What is the maximum number of reservations that it could accept for a flight with a capacity of 160, if it wants the probability of accommodating all reservation holders to be at least

3. ### statistics

an airline estimates that 97%of people booked on their flights actually show up.if the airline books 70 people on a flight for which the maximum number is 68,what is the probability that the number of people who show up will

4. ### Social

In the introduction, explaining the historical conditions or factors that led up to your report A) may be unnecessary, depending on the nature and length of your report. B) is unnecessary in internal reports. C) diminishes your