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Sample Mean Hypothesis Testing
Imagine that you have a portfolio of stocks. You want to compare the performance of your stocks to the market as a whole. You learn that the population mean,μ, of stock returns is 7%, and that the population standard deviation, σ, is 2%.
Sample Proportion Hypothesis Testing
Individuals are often classified as being morbidly obese if they are 100 pounds overweight. Imagine that the population proportion of morbidly obese individuals in the country as a whole is 2%.
Conduct a hypothesis test to determine if the proportion of traffic accidents is the same for each day of the week. What is the p-value? Using a .05 level of significance, what is your conclusion?
a.There is less than 7 beds per house in Compton; Decision in to reject the null hypothesis b. 30 % of Americans go to church on Sundays. Decision is not to reject the null hypothesis
A student scored 84 points on a test where the mean score was 79 and the standard deviation was 4. The student's z score was:
read the following problems and compute the number of possibilities.q1. how many different 5-shy-card poker hands
What sample size is needed to estimate with 95% confidence the mean intake of calcium within 20 units of the true mean if the intake is from a normal distribution with a variance of 1900 units?
Boston Globe article "bargains on the menu-and a Side of Jitters" reported concerns
the bureau of labor statistics reported that the mean amount spent per year by all american citizens on tobacco
One of the 4 bus drivers is also randomly selected. Let Y denote the number of students on his bus. Compute the expectations of X and Y?
What probability distribution does n1 alone have? Specify the values of the sample size index and parameter for that distribution.
you have been hired by medicaid state run program in support of medical care for indigent to advise the director on how
Two quadratic equations that are multiples of each other are actually the same equation, and that they don't count as being "more than one QE that have the same solution set".
Compute a 90% confidence interval for the population mean μ of home run percentages for all professional baseball players.
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