Questions from Business Statistics

Q: The president of Doerman Distributors, Inc., believes that 30%

The president of Doerman Distributors, Inc., believes that 30% of the firm’s orders come from first-time customers. A random sample of 100 orders will be used to estimate the proportion of first-time...

Q: The Wall Street Journal reported that the age at first startup for

The Wall Street Journal reported that the age at first startup for 55% of entrepreneurs was 29 years of age or less and the age at first startup for 45% of entrepreneurs was 30 years of age or more. a...

Q: In 2017, the Restaurant Hospitality website reported that only 10%

In 2017, the Restaurant Hospitality website reported that only 10% of surplus food is being recovered in the food-service and restaurant sector, leaving approximately 1.5 billion meals per year uneate...

Q: In 2016 the Better Business Bureau settled 80% of complaints they

In 2016 the Better Business Bureau settled 80% of complaints they received in the United States. Suppose you have been hired by the Better Business Bureau to investigate the complaints they received t...

Q: The Grocery Manufacturers of America reported that 76% of consumers read

The Grocery Manufacturers of America reported that 76% of consumers read the ingredients listed on a product’s label. Assume the population proportion is p = .76 and a sample of 400 consumers is selec...

Q: The Food Marketing Institute shows that 17% of households spend more

The Food Marketing Institute shows that 17% of households spend more than $100 per week on groceries. Assume the population proportion is p = .17 and a sample of 800 households will be selected from t...

Q: A population has a mean of 400 and a standard deviation of

A population has a mean of 400 and a standard deviation of 100. A sample of size 100,000 will be taken, and the sample mean / will be used to estimate the population mean. a. What is the expected valu...

Q: Assume the population standard deviation is σ=25. Compute the

Assume the population standard deviation is σ=25. Compute the standard error of the mean,
, for sample sizes of 500,000; 1,000,000; 5,000,000; 10,000,000; and 100,000,000. What can you say about the...

Q: A sample of size 100,000 is selected from a population

A sample of size 100,000 is selected from a population with p 5 .75. a. What is the expected value of /? b. What is the standard error of /? c. Show the sampling distribution of /. d. What does the sa...

Q: Tablet PC Comparison provides a wide variety of information about tablet computers

Tablet PC Comparison provides a wide variety of information about tablet computers. The company’s website enables consumers to easily compare different tablets using factors such as...