Questions from Applied Statistics

Q: In painting an automobile, the thickness of the color coat has

In painting an automobile, the thickness of the color coat has a lower specification limit of 0.80 mil and an upper specification limit of 1.20 mils. Find the Cp and Cpk capability indexes if (a) the...

Q: Moisture content per gram of a certain baked product has specification limits

Moisture content per gram of a certain baked product has specification limits of 120 mg and 160 mg. Find the Cp and Cpk capability indexes if (a) the process mean is 140 mg and the process standard de...

Q: Employees of Axolotl Corporation were sampled at random from pay records and

Employees of Axolotl Corporation were sampled at random from pay records and asked to complete an anonymous job satisfaction survey, yielding the tabulation shown. Research question: At α...

Q: Sixty-four students in an introductory college economics class were asked

Sixty-four students in an introductory college economics class were asked how many credits they had earned in college, and how certain they were about their choice of major. Research question: At &Ici...

Q: To see whether students who finish an exam first get the same

To see whether students who finish an exam first get the same grades as those who finish later, a professor kept track of the order in which papers were handed in. Of the first 25 papers, 10 received...

Q: A sample of 200 customers at a supermarket showed that 28 used

A sample of 200 customers at a supermarket showed that 28 used a debit card to pay for their purchases. (a). Find the 95 percent confidence interval for the population proportion. (b). Why is it OK t...

Q: From 74 of its restaurants, Noodles & Company managers collected data

From 74 of its restaurants, Noodles & Company managers collected data on per-person sales and the percent of sales due to “potstickers” (a popular food item). B...

Q: A web-based anonymous survey of students asked for a self

A web-based anonymous survey of students asked for a self-rating on proficiency in a language other than English and the student’s frequency of newspaper reading. Research question:...

Q: State your a priori hypotheses about the sign (+ or -) of

State your a priori hypotheses about the sign (+ or -) of each predictor and your reasoning about cause and effect. Would the intercept have meaning in this problem? Explain.

Q: A student team examined parked cars in four different suburban shopping malls

A student team examined parked cars in four different suburban shopping malls. One hundred vehicles were examined in each location. Research question: At α = .05, does vehicle type vary...