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In a random sample of 100 claims filed against an insurance company writing collision insurance on cars, 30 exceeded $1,200. 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?
If the p value for a test for difference of educational level of two groups is p=0.0184, is the difference statistically significant at the 0.01 level?
A survey of magazine subscribers showed that 55.8% rented a car during the last 12 months for business reasons, 44% rented a car for personal reasons, and 25% rented a car for both business and personal reasons.
A better case can be made that observation 13 (Los Arboles) is an outlier. Describe what this means in plain terms.
Calculate the test statistic (z-score) for the sample. What decision should be made about the null hypothesis, and what decision should be made about the effect of the program.
Registration process takes, on average, 2 minutes per patient. Among patients who get prescriptions, average time spent with doctor is 5 minutes. Among those admitted to hospital, average time is 30 minutes.
Compute population µ and ð for the population. Find the z score for each population transform the original population into a new ppulation of N=5 with a mean µ=60 standard dev.ð=8.
Give an example of a hypothesis test you could perform at work or at home. State what the Null and the Alternative hypotheses would be in your test.
The manager wants to know the probability that any particular cookie will have fewer than 5. What type of probability distribution will most likely be used to analyze the number of chocolate chips per cookie?
Perform the sensitivity analysis for the COM-TECH case. Assume you are interested in following two probabilities: probability of receiving grant, and probability of high cellular R&D costs.
For each mutual fund, find an interval in which you would expect 95.44 percent of all yearly returns to fall. Assume returns are normally distributed.
Suppose we wish to predict the crawling age of a particular baby when the average outdoor temperature is 25°F six months after birth.
Do students tend to improve their SAT Mathematics (SAT-M) score the second time they take the test? A random sample of four students who took the test twice received the following scores
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