Determining confidence interval-test of hypothesis

Reference no: EM13105889

1. In an article in the Journal of Management, Morris, Avila and Allen studied innovation by surveying firms to find the number of new products introduced by the firms. A random sample of 100 California based firms are selected. Each firm is asked to report the number of new products introduced last year. The survey found that on average these firms introduced 5.68 products with a standard deviation of 8.70. Compute a 98% confidence interval for the new products introduced last year.

2. The score on the entrance test for a well known law school has a mean score of 200 points and a standard deviation of 50 points. At value should the lowest passing score be set if the school wishes only 2.5% of those taking the entrance test to pass?

3. A trans-oceanic airline conducted a study to determine whether the average weight of baggage checked by a passenger differs significantly from 45 pounds. A random sample of 25 passenger baggages recorded a mean weight of 43.5 pounds with a standard deviation 6 pounds. Can the airline conclude that the mean weight of checked baggage is significantly different from 45 pounds at a 95% level of confidence?

Reference no: EM13105889

Questions Cloud

What is the radius of the circle : At t1 = 5.00 s, the acceleration of a particle moving at constant speed in counterclockwise circular motion is a1=(2m/s^2)i + (9m/s^2)j At t2 = 6.00 s (less than one period later), the acceleration is a2= (9m/s^2)i - (2m/s^2)j The period is more t..

Normal distribution and confidence intervals : State the main points of the Central Limit Theorem for a mean. Why is population shape of concern when estimating a mean? What does sample size have to do with it?"

Select the appropriate variables to graph on each axis : You have two small 2.0- balls that have been given equal but opposite charges, but you don't know the magnitude of the charge. To find out, you place the balls a distance apart on a slippery horizontal surface, release them, and use a motion detec..

Solving linear program using the decomposition principle : Solve the following linear program using the decomposition principle: minimize z = ?2x1 ? 5x2 subject to x1 + 2x2 = 13.5 x1 + 3x2 = 18.0 x1 ? 9 x2 ? 5 x1, x2 ? 0.

Determining confidence interval-test of hypothesis : In an article in the Journal of Management, Morris, Avila and Allen studied innovation by surveying firms to find the number of new products introduced by the firms.

Finding initial basic feasible solution : Consider the cutting stock problem that arises when a company manufactures sheets of standard width 100 and has commitments to supply 40 sections of width 40, 60 sections of width 24, and 80 sections of width 18.

Compute cutting and saving time by scheduling overtime : Additional cutting and saving time can be obtained by scheduling overtime for this operations. Each hour of overtime for cutting operation increases hourly cost $15 and each hour of overtime for sewing operation.

Information about confidence interval and probability : A building developer has the opportunity to purchase several acres of land that is divided up into several lots for building single-family homes.

Trauma bays of hospitals : The local hospital's emergency department has 5 trauma bays. On average, patients requiring a trauma bay arrive every 50 minutes (with a coefficient of variation of 1, no seasonality exists).

User Account

All Pages