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1. According to studies, 1% of all patients who undergo laser surgery to correct their vision have serious post laser vision problems. In a sample of 95,000 patients, what is the approximate probability that fewer than 960 will experience serious post laser vision problems? 2. If a population data set is normally distributed, what is the proportion of measurements you would expect to fall in the following intervals: a. μ±σ b. μ±2σ c. μ±3σ
a sample standard deviation of 1.1%. Using alpha = 0.05, does the analyst have statistical evidence to reject the claim made by the magazine?
A recent study focused on the number of times men and women who live alone buy take-out dinner in a month. The information is summarized below.
A poll found that 38% of male voters and 46% of female voters support a particular candidate. To test whether this candidate has equal levels of support between male and female voters, the null hypothesis should be
A software company wants to determine whether there is a relationship between their three sales offices and the sales of their software products. The actual sales results are
The General Social Survey is an annual survey given to about 1500 U.S. adults selected at random. Each year, the survey contains several questions meant to probe respondents' views of employment.
Do you think they can be solved explicitly? Take the derivative of the gamma distribution and set it equal to zero and solve for alpha and beta to find the mle?
Of these, 36 are seniors, 30 are chemistry majors, and 8 are neither. A student is selected at random from the class. What is the probability that the student is both a senior and a chemistry major?
A square yard of carpet is examined for surface defects. Currently, the process produces an average of 2.4 defects per square yard. What is the probability of finding 2 or more surface defects in the sample.
Using hypergeometric distribution, determine the probability that the sample of 6 will comprise 2 nonconforming watches?
What is the probability that exactly 3 tomatoes in a randomly selected tray of 20 tomatoes will be too ripe. In each tray of 20 tomatoes, how many would be expected to be too ripe?
What can we say with 99% confidence about the maximum error, if we use the sample proportion as an estimate of the true proportion of claims filed against this insurance company that exceed $1,200?
A computer password consists of four characters. The characters can be one of the 26 letters of the alphabet. Each character may be used more than once. How many different passwords are possible?
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