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Part of a usability study to assess voting machines measured the time on task (TOT) of voters casting ballots (efficiency)
The Stroop task is when color words are printed in the wrong color; for example, the word red might be printed in the color blue.
Is it harder to get into graduate programs in psychology or history? We randomly selected five institutions from among all U.S. institutions with graduate
At some vacation destinations, "all-inclusive" resorts allow you to pay a flat rate and then eat and drink as much as you want.
On its Web site, the Princeton Review claims that students who have taken its course improve their GRE scores, on average, by 210 points
Scenario: Steven collected data from 20 college students on their emotional responses to classical music. Students listened to two 30-second segments
Suppose that, for a t test, your computed value for t is +3.28. The critical value of t is +2.048. Explain what this means
A researcher is interested in comparing the response times of two different cab companies. Companies A and B were each called at 50 randomly selected times
Downs and Abwender (2002) evaluated soccer players and swimmers to determine whether the routine blows to the head experienced by soccer players
A running coach wanted to see whether runners ran faster after eating spaghetti the night before. A group of six runners was randomly chosen for this study
In studies examining the effect of humour on interpersonal attraction, McGee and Shevlin (2009) found that an individual's sense of humor had a significant
Solar cells are attached to a panel with a new heat resistant adhesive. The adhesive must provide 2.80 pounds of force in order to hold the cell on the panel
Suppose that, in a sample of 200, we observe 140 successes. Is this sufficient evidence at the 1% significance level to indicate the the population proportion
Explain thoroughly, the concept of standard deviation.
A five-year old study claims that selling prices of new homes / condominiums in the New York area have a normal distribution with mean = $180,000
Perform hypothesis testing on one variable's data. (Choose either the intrinsic or extrinsic column.) Perform a t-test by formulating a null and an alternative
Find the standard deviation for the given data. Round your answer to one more decimal place than the original data.
The election is one week away. You think you have the election sewn up, but the seem appears to be unraveling. You run a poll, draw a random sample of 500 adult
Consider an infinite population with a normal shape and a mean of 300 and standard deviation of 30.
Here is a sample of 106 body temperatures (attached file) with a mean of 98.20 F. Assume that σ is known to be 0.62 F.
Describe the distribution of sample means based on samples of n = 16 selected from this population.
A normal distribution has a mean=60 and a standard deviation=6. Find the following probabilities:
Dr.Radman has been collecting data on a simplified intake form. One measure that was taken was the amount of time (in minutes)
DiGiorno's frozen pizza has some of the most creative and likeable advertisements on television.
When to use a t-test and when to use a z-test. How to choose between a t-test and a z-test, a one-sample test and a two-sample test, and a one-sided