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1). In Module 4, we considered Mary's interest in doing a study to see if learning of 6th graders on a math lesson is affected by background noise level. There, she was planning to use 2 noise conditions and then analyze her outcomes using a t-test for independent groups. Describe the study Mary might plan where she would use a one-way analysis of variance (ANOVA) for independent groups instead of a t-test to study differences between noise levels. What is her independent variable here? Describe the conditions she could create for this study. What is her dependent variable? Describe a way to measure the DV so that each participant would have one score at the end that would be on a continuous scale of measurement. Support your responses.
2). Consider Mary's study of whether the learning of 6th graders on a math lesson is affected by background noise level. Describe the pros and cons of Mary using a repeated measures design for this study. What would you probably choose to do? Support your responses.
A quality control engineer at a potato chip company tests the bag-filling machine by weighing bags of potato chips. Not every bag contains exactly the same weight. But if more than 15% of bags are overfilled, then they stop production to fix the mach..
task 1hrh king of zamunda gathered gruesome data on deaths of his people from fire accidents in the last n2000 years
Toss the coin four times. If the coin lands either all heads or all tails, reject Ho: p=1/2 (the p denotes the chance for the coin to land on heads.) Complete parts a and b. a. what is the probability of a type 1 error for this procedure? b. if p=4/5..
Identify sample, population, sampling frame (if applicable), and response rate (if applicable). Describe sampling technique (if applicable) or experimental design
A manufacturer creates widgets whose mass has mean 5 and standard deviation sigma. Ten widgets are shipped, and the shipment will be rejected if any of the widgets has mass = 7. Give the largest value sigma can be such that the probability of reject..
The National Institute of Mental Health published an article stating that in any one-year period, approximately 9.5 percent of American adults suffer from depression or a depressive illness. Suppose that in a survey of 100 people in a certain town, s..
Find the probability that if four subcomponents are randomly selected, all four have lengths that exceed 120 cm. normally distributed with mean =117cm and standard deviation of 5.2 cm
A class consists of 12 boys and 7 girls. Two students will be randomly selected from the class. Let x=the number of girls selected. a. Construct a probability distribution for x.
Jack weighs 160 pounds and his sister weighs 110 pounds. If the mean weight for men his age is 175 with a standard deviation of 14 pounds and the mean weight for women is 145 with a standard deviation of 10 pounds, determine whose weight is closer to..
Give the 95% confidence interval.
Given the following, complete the ANOVA table and make the correct inference.
Injector pump and injectors tested and found OK
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