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A lottery game is played by choosing six whole numbers between 1 and 49. The grand prize is won if all six numbers chosen match the winning numbers drawn. We can think of choosing the winning numbers as the same thing as choosing a simple random sample of size 6.
a. What is the list of units from which the sample will be chosen?
b. Use a computer random number generator or invent your own random mechanism to draw six numbers. Explain your process, and write down the six numbers chosen.
c. George plays this game weekly. Assume that the winning numbers are drawn fairly, so that any number has the same chance of occurrence. Would George have a better chance of winning if he chose the same numbers every week, if he chose different numbers every week, or does it matter?
Five percent of the respondents gave $25,000 or more to charity over the previous year. Develop a 95% confidence interval for the proportion who gave $25,000 or more to charity.
In the new poll, if the proportion favoring the incumbent has not changed, what is the mean and standard deviation of the number preferring the incumbent?
a two-sample t test is going to be carried out where it is assumed that the population variances are unknown but
In this discussion, we will investigate confidence intervals and t tests for continuous data. To do this, we will revisit the TAA data that you studied in the Week Three assignment.
Smith bicycled 45 miles going east from Durango, and Jones bicycled 70 miles. Jones averaged 5 miles per hour more than Smith, and his trip took one-half hour longer than Smith's. How fast was each one traveling?
what are the probability of you having the disease?
Pareto charts. Pareto charts are bar graphs with the bars ordered by height. They are often used to isolate the "vital few" categories on which we should focus our attention. Here is an example
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..
Births. Randomly selected births records were obtained and results are listed in the table below (based on data from the National Vital statistics Report,
the shell of the land snail limocolaria martensiana has two possible color forms. streaked and pallid. in a certain
Why did white supremacy groups such as the Ku Klux Klan rise up in the south after the Civil War?
Suppose are running a study/poll about the probability of a true negative on a test for a certain cancer. You randomly sample 140 people and find that 70 of them match the condition you are testing.
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