Questions from Business Statistics

Q: Consider the Angus weights model N(1152,84) one

Consider the Angus weights model N(1152,84) one last time. 1. What weight represents the 40th percentile? 2. What weight represents the 99th percentile? 3. What the IQR of the weights of these Angus s...

Q: Here are several scatterplots. The calculated correlations are 0.923

Here are several scatterplots. The calculated correlations are 0.923,0.487,0.006, and 0.777. Which is which?

Q: Consider the IQ model N(100,15) one last

Consider the IQ model N(100,15) one last time. 1. What IQ represents the 15th percentile? 2. What IQ represents the 98th percentile? 3. What the IQR of the IQs?

Q: Assume the cholesterol levels of adult American women can be described by

Assume the cholesterol levels of adult American women can be described by a Normal model with a mean of 188 mg/dL and a standard deviation of 24. 1. Draw and label the Normal model. 2. What percent of...

Q: A tire manufacturer believes that the tread life of its snow tires

A tire manufacturer believes that the tread life of its snow tires can be described by a Normal model with a mean of 32,000 miles and standard deviation of 2500 miles. 1. If you buy one of these tires...

Q: Companies that design furniture for elementary school classrooms produce a variety of

Companies that design furniture for elementary school classrooms produce a variety of sizes for kids of different ages. Suppose the heights of kindergarten children can be described by a Normal model...

Q: Most people think that the normal adult body temperature is 98.

Most people think that the normal adult body temperature is 98.6F. That figure, based on a 19th-century study, has recently been challenged. In a 1992 article in the Journal of the American Medical As...

Q: Hens usually begin laying eggs when they are about 6 months old

Hens usually begin laying eggs when they are about 6 months old. Young hens tend to lay smaller eggs, often weighing less than the desired minimum weight of 54 grams. 1. The average weight of the eggs...

Q: Agricultural scientists are working on developing an improved variety of Roma tomatoes

Agricultural scientists are working on developing an improved variety of Roma tomatoes. Marketing research indicates that customers are likely to bypass Romas that weigh less than 70 grams. The curren...

Q: For many people, breakfast cereal is an important source of fiber

For many people, breakfast cereal is an important source of fiber in their diets. Cereals also contain potassium, a mineral shown to be associated with maintaining a healthy blood pressure. An analysi...