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Suggest one psychological research question that could be answered by each of the following types of statistical test:
* z test
* t test for independent samples, and t test for dependent samples
What is the value of the coefficient of Blue Collar in your equation? What is the lower limit of the 95% CI for this coefficient? What is the upper limit of the 95% CI for this coefficient?
Four percent of the customers of a store buy cigars. Half of the customers who buy cigars buy beer and one fourth of those who buy beer buy cigars. The table is given below:
The ages of cars owned by all employees of a large company have a bell shaped distribution with a mean of 8 years and a standard deviation of 2 years. Using the empirical rule, find the approx. percentage of cars (owned by those employees) that are b..
Determine the probability that tire wears out before 70,000 miles?
Find the z-score for a car driving 20 mph in this construction zone. It is an outlier (assume the data is bell shaped, so dont actually test it with pearsons index).
The results of the simple linear regression are provided below.
Box 1 has 3 chips numbered 1,2,3. Box 2 has 2 chips numbered 1 and 2. Suppose a chip is randomly selected from box 1 and placed in box 2.
The mean area of several thousand apartments in a new development is advertised to be 1250 sq. ft. An engineer measured a random sample of apartments:
Using variables below, (1) mention all research questions that would be replied with a Two Way ANOVA test, (2) make null hypotheses for these questions.
What is the likelihood that the mean annual precipitation during 25 randomly picked years will be less than 90.8 inches?
A research firm conducted a survey to determine the mean amount people spend at a popular coffee shop during a week. They found the amounts spent per week followed a normal distribution with a population standard deviation of $4.
Mr. Connors philosophy class has 99 students, classified by academic year and gender, as illustrated in the table below. Mr. Connor randomly chooses one student to collect yesterday's work. What is the probability that he selects a male, given tha..
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