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The lifetimes of 10 light bulbs (in hours burned) were recorded as follows:
51, 62, 45, 56, 73, 71, 63, 58, 59, 54
Assume the lifetime of a light bulb comes from a normal distribution.
a. Estimate the population variance (sigma^2) .b. Compute a 99 percent two-sided confidence interval for population variance (sigma^2).c. Compute a value V that enables us to state, with 90 percent confidence, that population variance (sigma^2) is less than V.
Run a simple regression of the dependent variable demand on the independent variable price and observe the coefficient on price.
An election poll reported that a candidate had an approval rating of 48% with a margin of error E of 3%. Construct a confidence interval for the proportion of adults who approve of the candidate.
At the .01 significance level, is there a relationship between job pressure and age?
Find a linear function G(p) that gives the number of gallons sold as a function of the price of the milk.
You're interested in determining the volume of sales dollars necessary for the coming year to reach the break-even point. You've decided to break down the sales for the club into four categories, they are as follows:
Correlation between the two variables - Evaluate the value of the correlation coefficient.
By using the maximax criterion, what decision should be made by the decision maker?
Discuss the concept of statistical significance, including your understanding of what it means, why it is important, and how it can be used.
47% of students have children under 17 living at home with them. Find the probability that a random sample of 800 students will return more than 50% students with children under 17 living at home with them.
Suppose that the probability that a new medication will cause a bad side effect is 0.03. If this medication is given to 150 people, what is the probability that exactly three of them will experience a bad side effect.
Provide an example of a couple of variables that we work with that could meet the binomial criteria above.
Should Katie conduct a between-subject ANOVA or a within-subject ANOVA? Describe your answer.
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