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An independent government agency is interested in comparing the heating is interested in comparing the heating cost of all-electric home
Bring to mind a real-world situation or problem that could be addressed using an independent- or related-samples t test.
An Ohio university wishes to demonstrate that car ownership is detrimental to academic achievement.
Two movies were screen-tested at two different samples of theaters. Mystic river was viewed at 80 theaters and was considered a success in terms
Fishing Trout. Pyramid Lake is on the Paiute Indian Reservation in the Nevada. The lake is famous for cutthroat trout.
A manufacturer has taken a sample of 25 packages from a production line, the standard deviation of the sample weight is 2.1 pounds, and the mean weight
The average mpg usage for a 2004 Ford Expedition 2WD for a sample of 10 tanks of gas was 17.0 with the standard deviation of 0.8
The Sunbeam Corporation makes a wide variety of appliances for the home. One product is a digital blood pressure gauge
You will set up one column for the Independent Variable (e.g., "type of painting") and then identify the different levels of this Independent Variable
The mean age of 25 randomly selected college seniors was found to be 23.5 years, and the standard deviation of all college seniors was 1.3 years.
A sample of 25 concession stand purchases show a mean purchase of $5.29 with a standard deviation of $3.02
A coin-operated drink machine was designed to discharge a mean of 8 ounces of coffee per cup.
Suppose that a one-tailed t-test is being applied to find out if the population mean is less than $212. The level of significance selected is 0.01 and 2
In a study of the lizard Sceloporis occidentalis, researchers examined field-caught lizards for infection by the malarial parasite Plasmodium.
How can you tell when you should use the ANOVA versus a t-test? What is one problem with using the ANOVA when the t-test is the appropriate data analysis?
In the past, young women drivers have maintained a better driving record than young men drivers. An insurance company is concerned with the driving record
A financial planner wants to compare the yield of income- and growth-oriented mutual funds. Fifty thousand dollars is invested in each of a sample of 35
A group of 20 sales associates agree to go through a week-long sales class to improve their productivity. The amount of their sales are computed for one month
A month of sales data are collected on sales of different types of computer products. Run the t-tests to determine:
A manufacturer claims that the mean lifetime of its fluorescent bulbs is 1050 hours. A homeowner selects 40 bulbs and finds the mean lifetime to be 1030 hours
Silver Gym's aerobic class grew so large that the class had to be split in half and offered on two different nights. Silver also hired a new aerobic leader
Suppose you want to test the claim that population mean µ=3.5. Given a sample size of n=34 and a level of significance of a=0.01, when should you reject Ho?
Imagine that stimulus students are asked to indicate how likely they are to use a new breakfast-food/ toothpaste combination
The engineer in a widget factory wants to test out a new form of raw materials. So a batch of widgets are made in the old manner as a control
Implement raw data tables and computations, using both graphical and tabular methods of displaying data and results