Questions from Business Statistics

Q: The time needed to complete a final examination in a particular college

The time needed to complete a final examination in a particular college course is normally distributed with a mean of 80 minutes and a standard deviation of 10 minutes. Answer the following questions....

Q: According to Money magazine, Maryland had the highest median annual household

According to Money magazine, Maryland had the highest median annual household income of any state in 2018 at $75,847 (Time.com website). Assume that annual household income in Maryland follows a norma...

Q: A binomial probability distribution has p = .20 and n =

A binomial probability distribution has p = .20 and n = 100. a. What are the mean and standard deviation? b. Is this situation one in which binomial probabilities can be approximated by the normal pro...

Q: Assume a binomial probability distribution has p = .60 and n

Assume a binomial probability distribution has p = .60 and n = 200. a. What are the mean and standard deviation? b. Is this situation one in which binomial probabilities can be approximated by the nor...

Q: Although studies continue to show smoking leads to significant health problems,

Although studies continue to show smoking leads to significant health problems, 20% of adults in the United States smoke. Consider a group of 250 adults, and use the normal approximation of the binomi...

Q: According to a Yale program on climate change communication survey, 71

According to a Yale program on climate change communication survey, 71% of Americans think global warming is happening (American Psychological Association website). a. For a sample of 15 Americans, wh...

Q: OutdoorGearLab is an organization that tests outdoor gear used for climbing,

OutdoorGearLab is an organization that tests outdoor gear used for climbing, camping, mountaineering, and backpacking. Suppose that the following data show the ratings of hardshell jackets based on th...

Q: Suppose that of those individuals who play video and computer games,

Suppose that of those individuals who play video and computer games, 18% are under 18 years old, 53% are 18–59 years old, and 29% are over 59 years old. Use the normal approximation of the binomial di...

Q: Rocky Mountain National Park is a popular park for outdoor recreation activities

Rocky Mountain National Park is a popular park for outdoor recreation activities in Colorado. According to U.S. National Park Service statistics, 46.7% of visitors to Rocky Mountain National Park in 2...

Q: Consider the following exponential probability density function. / a

Consider the following exponential probability density function. a. Find P(x ≤ 6). b. Find P(x ≤ 4). c. Find P(x ≥ 6). d. Find P(4 â‰...