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An international psychology researcher is invited by an elementary school in Bogota to conduct a study to investigate the impact of noise from a construction site proposed for a site close to the school on teachers' ability to effectively present class material.
The manipulated independent variable is identified as the likely levels of noise produced by the construction site (60 vs. 65 dB).
In a lab setting, ten teachers from the school are randomly assigned to each level of noise; these participants vary widely in age, hearing acuity, and teaching style.
The dependent variable is performance on a verbal learning task (how many words on a list of 25 words each participant remembers). The t value obtained is not statistically significant.
What advice would you give to the international psychologist about ways to redesign this study that might improve the chances of detecting an effect of noise on the verbal learning task?
Using probability: How can you use probability to improve your chances of winning at a casino. Provide specific examples using concepts learned in this module
Find the 90% confidence interval for the mean, variance, and standard deviation for the price in dollars of an adult single-day ski lift ticket.
The mean salary for engineers with less than 5 years' experience is $60,000 with a standard deviation of $5,000. Compute the z values for both Rob and Rachel.
What are values of the average and median - What is the shape of the data?
suppose that 67 of the employees of a company participate in the companys medical savings program. let x be the number
Consider the following continuously operation job shop. Inter arrival times of jobs are described as follows: What is the average time for the 10 new jobs?
Past experience shows that the standard deviation of the yearly income of textile workers in a certain state is $400. How many textile workers would you need to sample if you wished to estimate the population mean to within $50.00, with probabilit..
Create percent frequency distribution tables for key variables: type of customer, net sales, method of payment, gender, marital status and age - Summarize the frequency, total amount spent and average amount spent by day of week and by type of brows..
The time a cashier spends processing individual customer's order are independent random variables with mean 2.5 minute and standard deviation of 2.
suppose the probability is 0.8 that any given person will believe a tale about the transgressions of a famous actress.
Does your client have a liability that should be recorded at December 31? Discuss. For what possible reason(s) might your client wish to postpone recording the transaction?
In the past, of all the students enrolled in "Basic Business Statistics" 10% earned A's 20% earned B's, 30% earned C's, 20% earned D's and the rest either failed or withdrew from the course.
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