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1. List the four topics that determine the power of an experiment. [If you can recall them without looking at the text, you know that you have been reading actively (and effectively).]
2. What is the effect of set (previous experience) on problem solving? In a classic experiment by Birch and Rabinowitz (1951), the problem was to tie together two strings (A and B in the illustration) that were suspended from the ceiling. The solution to the problem is to tie a weight to string A, swing it out, and then catch it on the return. The researcher supplied the weight (an electrical light switch) under one of two conditions. In one condition, participants had wired the switch into an electrical circuit and used it to turn on a light.
In the other condition, participants had no experience with the switch. Does education (wiring experience) have an effect on the time required to solve the problem? State the null hypothesis, analyze the data in the accompanying table with a t test and an effect size index, and write a conclusion.
Which of the following is not true about the student's t distribution? It has more area in the tails and less in the center than does the normal distribution.
What is the characteristic function of N? What is the mean and variance of N? What is the pmf of N? What is the probability that N is an even number?
recently the number of airline companies that offer in-flight wi-fi service to passengers has increased. however it is
Find a 95% confidence interval for the proportion p of the inner-city, working-class group who eventually became alcoholics.
you want to give a bonus to the top 5 of your sales people and extra special attention to the bottom 25. average sales
Airplaneflight during the last year. If we take a random sample of 40 adults, the probability is 0.37 that the sample proportion is greater than what number.
Describe how to use the data to construct a bootstrap distribution. What value should be recorded for each of the bootstrap samples - Use technology to construct a bootstrap distribution with at least 1,000 samples and estimate the standard error.
Use the confidence level and sample data to find a confidence interval for estimating the population mean m.
Graph the relationship between the two variables and is there sufficient evidence to infer that height and length of index fingers are linearly related?
A vendor sells hot dogs and bags of potato chips. A customer buys 4 hot dogs and 5 bags of potato chips for $12.00 another customer buys 3 hot dogs and 4 bags of potato chips for $9.95. Find the cost of each item.
The process is monitored using a sample size of 20. Calculate the upper and lower control limits. Give your answers to 2 decimal places.
The fleet of yellow fire trucks made 135,035 runs and had 4 accidents. At α = .01, did the yellow fire trucks have a significantly lower accident rate?
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