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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
Based on the Nielsen ratings, the local CBS affiliate claims its 11:00 PM newscast reaches 41% of the viewing audience in the area.
You are the president of a medium size marketing research and management-consulting firm. ZYX Inc has hired you for a new management-consulting project
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
A manufacturer makes steel rods that are supposed to have a mean length of 50 centimeters. A retailer suspects that the bars are being produced too short.
Research at the University of Toledo indicates that 50 percent of the students change their major area of study after their first year in a program.
Based on the provided data, you have been given the task of showing that there is a difference between gender and potato chip preferences.
A home has a solar electric system. The owner collected voltage readings from a meter connected to the electric system.
In several presidential elections, researchers' have observed a "gender gap" in which men and women vote for candidates in different proportions.
An insurance company, based on past experience, estimates the mean damage for a natural disaster in its area is $5,000
A sample of people is asked their height, and then a measurement of their actual height is taken. Your null hypothesis is that self-reported and actual heights
The historical mean of scholarship examination scores for freshman applications at a local university is 900. A historical population standard deviation of 180
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
The filling variance for boxes of cereal is designed to be .02 or less. A sample of 30 boxes of cereal shows a sample standard deviation of .16 ounces.
A sample of 40 recovering alcoholics was given the State-Trait Anxiety Inventory Test (STAI). The state anxiety score showed a mean of 38
The mean number of calories per 6-ounce can of tomato paste is supposed to be 150. A weight watchers group thought that was larger than 150
A sample of 36 observations is selected from a normal population. The average sample is 21 and the standard deviation of the sample is 5
A sample of 121 provided a sample mean of 77.3. The population standard deviation is known to be 16.5.
A new soft drink is being market tested. A sample of 400 individuals participated in the taste test and 100 indicated that they like the taste
Quality Associates, Inc, a consulting firm, advises its clients about sampling and statistical procedures that can be used to control their manufacturing
In order to compare the characteristics of two different populations, a sample should be extracted from each population
In this test, the variance is known. Find the p-value of the test to 4 decimals, if the obtained value of the test statistic is 2.34.
In the following test, the variance is known. What is the rejection rule for the null hypothesis, if the level of significance
In 2001, the U.S. Department of Labor reported the average hourly earnings for U.S. production workers to be $14.32 per hour