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There are 40 students in an elementary statistics claSs. On he baSis of years of experience, the instructor knows that the time needed to grade a randomly chosen first examination paper is a random variable with an expected value of 6 min and a standard deviation of 6 min. a) If grading times are independent and the instructor begins grading at 6:50 pm and grades continously, what is the (approx) probability that he is through graDing before the 11:00 pm TV news begins? b) If the sports report begins at 11:10, what is the probability that he misses part of the report if he waits until grading is done before turning on the TV?
Determine the probably of selecting a female or an accounting major? Which rule of addition did you apply?
Based on the Correlation following are Multiple choices question. If the correlation coefficient among two variables is equal to zero, what can be said of the variables X and Y.
People assigned to assemble circuit boards for a computer manufacturing company under go on the job training. From past experience it was found that the learning curve for the average employee is given by:
The company can either settle out of court for $250,000 or go to court. If the company goes to court and loses, it must pay $825,000 plus $175,000 in court costs. If it wins in court the plaintiffs pay the court costs. Identify the states of natur..
In summer 2000, a growing number of warranty claims on Firestone tires sold on Ford SUVs prompted Firestone and Ford to issue a major recall. An analysis of warranty-claims data helped identify which models to recall.
The sales of the bicycle (in thousands of dollars) and also the levels of media expenditure (in thousands of dollars) during the test month are recorded. State the multiple regression equation.
You conduct a hypothesis test and you observe values for the sample mean and sample standard deviation when n = 25 that do not lead to the rejection of H0. You calculate a p-value of 0.0667.
At the .01 significance level can we (she) conclude that the true average daily amount of tips is greater than $80? yes or no.....
An experiment was carried out to assess the effects of four tomato varieties and four planting densities on yield. There were 64 plots, and each of the 16 factor combinations was randomly assigned to 4 plots.
Given a level of confidence of 99% and a population standard deviation of 10, what other information is necessary:
If the opinion poll had announced the margin of error for 80% confidence rather than 95% confidence, this margin of error would be?
Can we conclude that more than 60% of retired people in the age group would return to work? I need to do a Hypothesis Testing using only P value format (Explain in everyday words but also have the formal steps show with results) on this problem.
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