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a study of 60 professors showed that the time they spent on the average in creating test questions was 13.0 minutes per question. The standard deviation of the population is 2. What is them 98% conf
Find the probability of getting at least 127 boys among 152 babies. Does the result suggest that the YSORT method is effective? Why or why not?
A survey of licensed drivers inquired about running red lights. One question asked, "Of every ten motorists who run a red light, about how many do you think will be caught?" The mean result for 870
the running time for videos is normally distributed with mean 390 and standard deviation 148. suppose a sample of 40 videos are selected, what is the probability that the mean running time of the sa
everlast automobile tires 60000 miles and standard deviation of 5000. whats then probability the tire will last more then 67000 miles ?
The consultant suggested that an expenditure of $150,000 on a promotional campaign over the planning horizon will effectively reduce the probability of the worst case scenario to zero. If the campai
Construct indices measuring responsiveness to sugar taste, and provide descriptive statistics and graphical dis-plays for these indices. Do the indices appear normally distributed? Why or why not? C
Construct indices measuring responsiveness to sugar taste, and provide descriptive statistics and graphical displays for these indices. Do the indices appear normally distributed, compute the sample
Assume a binomial probability distribution with n = 40 and = 0.55. Compute the following: The mean and standard deviation of the random variable.
Suppose the money spent is uniformly distributed between these amounts. What is the probability a family spends more than $3,000 per year?
Clinton College would like to offer an honors scholarship to students who score in the top 10 percent of this test. What is the minimum score that qualifies for the scholarship?
What percent of the New York City commutes are for less than 30 minutes? What percent are between 30 and 35 minutes?
If John gets an 80 on a physics test where the mean is 85 and the standard deviation is 3, where does he stand in relation to his classmates?
LetÂ's assume you have taken 100 samples of size 49 each from a normally distributed population. Calculate the standard deviation of the sample means if the populationÂ's variance is 16.
The next exam is equally likely to be any of the three types. If the class does badly, then the next exam is always type 1. What proportion of exams are type 1, 2, and 3?
Compute the population mean margin of error for a 99% confidence interval when sigma is 4 and the sample size is 36.
A standard IQ test has a mean of 98 and a standard deviation of 16. We want to be 99% certain that we are within 8 IQ points of the true mean. Determine the sample size.
The piston bore should be 4.25 . He obtains 8 samples of 5 and records the following data. Calculate the lower and upper control limits for an X-bar chart."
A private medical clinic wants to estimate the true mean annual income of its patients. The clinic needs to be within $200 of the true mean. The clinic estimates that the true population standard de
Use the Regression Equation that you developed, predict the amount of Expected Debt for a Male student who weighs 185 pounds and who expects to earn $60,000 upon graduation.
An auditor wants to estimate what proportion of a bankÂ's commercial loan files are incomplete. The auditor wants to be within 7% of the true proportion when using a 95% confidence level. How
The research department wants to conduct a satisfaction survey at some of the theatres to determine how satisfied customers are with the theatre in which they just saw a movie.
Find a 95% confidence interval for the true mean annual income of the nursing school alumni. Write a statement about the confidence level and the interval you find.
A September 2012 Gallop poll was taken to determine national political party affiliation. Do the data in the ISS support the notion that Wayne State student are aligned with National party affiliation
Using a 95% confidence interval, estimate the true proportion of incomplete files for ALL the bankÂ's commercial loans. Write a statement about the confidence level and the interval you find.