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Describe the results of a hypothesis test of one population mean or population proportion
Cash withdrawals (in multiples of $20) at an on-campus ATM for a random sample of 30 Fridays and 30 Mondays are shown below.
The SAT scores of entering freshmen at X University have a normal distribution with mean µ1 = 1200 and standard deviation s1 = 90
In as population of test scores not known to be normally distributed, the mean is 50 and the standard deviation is 5.
Comparison between unemployment and import export data for the four different countries (China, Chile, Canada, and United States).
For each of the following scores, use the one-tail five percent (5%) criteria and determine if the occurrence of the score would be considered relatively likely
We analyze whether the true mean discharge of wastewater per hour from an industrial plant exceeds the company claims of 1000 gallons.
A random sample of 56 departing flights at an airport over a 3-month period had a mean wait of 14.2 minutes between boarding and takeoff
The Precision Scientific Instrument Company manufactures thermometers that are supposed to give readings of 0°C at the freezing point of water
Citrus Rental is a popular car rental agency that has a history of having too few cars available, so that its available cars are overdriven
Describe the results of the nonparametric hypothesis test that includes the null hypothesis statement that there is no difference between the mean selling price
Forty-eight male bank supervisors were each given the same personal file and asked to judge whether the person should be promoted to a branch manager job
A manufacturer makes steel rods that are supposed to have a mean length of 50 centimeters.
Based on the provided data, you have been given the task of showing that there is a difference between gender and potato chip preferences
In several presidential elections, researchers' have observed a "gender gap" in which men and women vote for candidates in different proportions.
Based on the Nielsen ratings, the local CBS affiliate claims its 11:00 PM newscast reaches 41% of the viewing audience in the area
In a large class, the professor has each person toss a coin 200 times and calculate the proportion of his or her tosses that were heads.
What is the purpose of a hypothesis test? What goes in the null hypothesis and what goes in the alternate hypothesis?
Define and discuss the following statistical terms within the context of a business example
In 2001, the U.S. Department of Labor reported the average hourly earnings for U.S. production workers to be $14.32 per hour.
The Employment and Training Administration reported the U.S. mean unemployment insurance benefit of $238 per week (The World Almanac 2003)
Marketing executives at Haug Motor Company, producers of the world's most imposing SUVs, are planning their sales campaign for a new model
The Restaurants McBurger says that the waiting time for customers is 3 minutes with a standard deviation of population 1 minute.
Many people eat cookies with milk. Suppose a cookie company is concerned that the cookie equipment may not be functioning properly when filling 32-ounce bags.
A sample of 40 recovering alcoholics was given the State-Trait Anxiety Inventory Test (STAI).