New York University Hypothesis Testing and MINITAB Data File Questions

1 question need to use minitab. You need to have the access to minitap.

Questions are attached below.

1.Use MINITAB data file is posted

The data in Used cars data file indicate the prices of 95 used BMW cars. Some have four-wheel drive (the model identified by the Xi type and the others two-wheel drive (the model denoted by the letter I). If we treat data as sample of the typical selling prices of these models, what do you conclude? Do four-wheel drive models command a higher price as two wheel drive, or not?

Use ? = 0.1.

2.The accompanying table shows the golf scores of nine golfers before and after a lesson given by a golf professional. Using ?=0.01 determine if the average score is lower for the golfers after the golf lesson when compared with before the golf lesson.

3.The following table shows the results of two random samples that measured the average number of minutes per charge for AA Lithium-ion (Li-ion) rechargeable batteries versus Nickel-Metal Hydride (NiMH) rechargeable batteries. Complete parts a through c.

a.Using ?=0.05 determine if the average number of minutes per charge differs between these two battery types.

b.Find a 90% confidence interval to estimate the difference between the average number per charge differs between these two battery types.

4.A study was recently conducted at a major university to determine whether there is a difference in the proportion of business school graduates who go on to graduate school within five years after graduation and the proportion of non-business school graduates who attend graduate school. A random sample of 400 business school graduates showed that 70 had gone to graduate school while, in a random sample of 500 non-business graduates, 128 had gone on to graduate school.

a.Based on these sample data, and a 0.08 level of significance, conduct an appropriate test statistic?

b.What is the p-value for the test you have conducted in part “a”.