Questions from Business Statistics

Q: When used in a particular DVD player, the lifetime of a

When used in a particular DVD player, the lifetime of a certain brand of battery is normally distributed with a mean value of 6 hours and a standard deviation of 0.8 hour. Suppose that two new batteri...

Q: A machine producing vitamin E capsules operates so that the actual amount

A machine producing vitamin E capsules operates so that the actual amount of vitamin E in each capsule is normally distributed with a mean of 5 mg and a standard deviation of 0.05 mg. What is the prob...

Q: The Wall Street Journal (February 15, 1972) reported that

The Wall Street Journal (February 15, 1972) reported that General Electric was sued in Texas for sex discrimination over a minimum height requirement of 5 feet, 7 inches. The suit claimed that this re...

Q: Suppose that your statistics professor tells you that the scores on a

Suppose that your statistics professor tells you that the scores on a midterm exam were approximately normally distributed with a mean of 78 and a standard deviation of 7. The top 15% of all scores ha...

Q: Suppose that the pH of soil samples taken from a certain geographic

Suppose that the pH of soil samples taken from a certain geographic region is normally distributed with a mean of 6.00 and a standard deviation of 0.10. Suppose the pH of a randomly selected soil samp...

Q: The light bulbs used to provide exterior lighting for a large office

The light bulbs used to provide exterior lighting for a large office building have an average lifetime of 700 hours. If lifetime is approximately normally distributed with a standard deviation of 50 h...

Q: Let x denote the duration of a randomly selected pregnancy (the

Let x denote the duration of a randomly selected pregnancy (the time elapsed between conception and birth). Accepted values for the mean value and standards deviation of x are 266 days and 16 days, re...

Q: The authors of the paper “development of nutritionally At-risk

The authors of the paper “development of nutritionally At-risk young children is Predicted by malaria, Anemia, and Stunting in Pemba, Zanzibar” (The Journal of Nutr...

Q: The paper “risk behavior, decision making, and music genre

The paper “risk behavior, decision making, and music genre in Adolescent males” (marshall university, may 2009) examined the effect of type of music playing and per...

Q: Consider the following 10 observations on the lifetime (in hours)

Consider the following 10 observations on the lifetime (in hours) for a certain type of power supply: Construct a normal probability plot, and comment on whether it is reasonable to think that the di...