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Question: One of the advances that have helped to diminish carpal tunnel syndrome is ergonomic keyboards. The ergonomic keyboards may also increase typing speed. Ten administrative assistants were chosen to type on both standard and ergonomic keyboards. The resulting typing speeds follow:
a. Produce a scatter plot of the typing speed of administrative assistants using ergonomic and standard keyboards. Does there appear to be a linear relationship between these two variables? Explain your response.
b. Calculate the correlation coefficient of the typing speed of administrative assistants using ergonomic and standard keyboards.
c. Conduct a hypothesis test to determine if a positive correlation exists between administrative assistants using ergonomic and standard keyboards. Use a significance level of 0.05.
Find the probability value of H0:u 2.8 distribution with 10 banks giving stats of 5.7, 4.8, 6.0, 4.9, 4.0, 3.4, 6.5, 7.1, 5.3, 6.1 which gives us H1:u 5.38.
What are the expected value and variance of Xi? Let Y = the sum of the outcomes of 3 die rolls. What is Yin terms of X,? Use the expected value and variance of Xi you found in a. to find the expected value and variance of Y.
Based on this information, construct the ANOVA table of summary findings and use the 0.025 level of significance in testing whether all of the treatment effects could be zero.
For each value of z*, find the cumulative probability P(Z ≤ z*):- z* = 1.96. - z* = -2.33. - z* = 2.58. - z* = 1.65.
Develop a tree diagram for tossing two, eight-sided gaming dice to figure out how many possibilities there are. Discuss the purpose of using such a visual in working out probability.
Suppose that the reported figure is a sample estimate based on 80 randomly chosen homes in this city, and that the population standard deviation was known to be $55,000. Give an 80% confidence interval for the population mean home price.
Multiple regression was employed to model the likelihood of changing a verdict from not guilty to guilty after deliberations, y, as a function of juror gender and whether or not expert testimony was given. Identify the independent variables in the..
If random samples of 36 download times are selected, what is the probability that the sample mean will be less than 0.84 seconds?
What is the probability that the chosen manager will be either a woman or over 50 years old or both? Solve both directly from the data and by using the law of unions. What is the probability that the chosen manager will be under 30?
How many standard deviations from the mean would a car going under the speed limit be?- Which would be more unusual, a car traveling 34 mph or one going 10 mph?
Use your knowledge of the historical events referred to by the simple statements to determine the truth value of the compound statements.- Either Lindbergh crossed the Atlantic and Edison invented the telephone or both Nixon resigned the presiden..
What is an index number as relates to time series analysis? In a regression of a time series that states data as a function of calendar year, what requirement of regression is violated?
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