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What is the 90% confidence interval estimate of the difference between the two population means? How do the results compare in all the three approaches to hypothesis testing?
What do you notice about the two histogrum and (therefore) about the estimates of probability of getting above 0?
Explain how significance is determined in simple terms as well and define a statistical interaction and how it affects your results. Give an example. List the variables that are interacting and why.
What is an interaction? Describe an example; what are the variables within your population (work, social, academic, etc.) for which you might expect interactions?
What was the explanatory variable? The explanatory variable is the number of students taking a first year seminar course for pre-health professional majors.
State the null hypothesis and the alternative hypothesis and compute the value of the test statistic and what is your decision regarding the null hypothesis?
Compute a confidence interval for the difference in population means and assume x is normally distributed in the populations and the variances of the populations are approximately equal.
Why, in my day, kids were much more respectful and didn't cause as much trouble as they do nowadays!" Formulate a hypothesis related to statement that you could test. How would you test it?
Develop the 90 percent confidence interval for the population mean and explain why we need to use the t distribution. What assumption do you need to make?
Run a chi square goodness of fit using Type of Purchasing (PurType) as the variable with all categories equal and report the observed and expected values and the tests of statistical significance.
Find the probability that among 13 pea offspring; at least 1 pea has a green pod and find the probability that among 8 pea offspring between 2 and 5 have yellow pods.
Does the Southside qualify for the employment assistance program and provide the city council with a recommended course of action based on this result.
What is the probability that the average will be 140 lbs or longer if the individuals are randomly selected and calculate the z-score for an x of 21.5 from a sample of size 25.
What is the probability that the individual is a driver and what is the probability that the individual is male?What is the probability that both are transit users?
If one person is picked at random from all the people represented in the table, what is the probability of the following events?
What is the probability that on your next trip to your friend's house, you will have to stop for exactly one red light and what is the probability that you will have to stop for at least one red light
A department store, on average, has daily sales of $28,707.47. The standard deviation of sales is $1000. On Tuesday, the store sold $34,650.77 worth of goods. Find Tuesday's z score. Was Tuesday an un
If you have a normal distribution of a random variable x, with a mean of 56 and standard deviation of 8: What is the probability that the random variable x will be within plus or minus 1 standard devi
I have a lower spec limit of -0.008 and an uppers spec limit of 0.008. The mean of the data is -0.00306 and standard deviation is 0.003642. What is the z-score and DPMO
Joe received a z score of -1.50 on a classroom test. This means that, compared to his classmates, Joe's score was...?
Having obtained the z score and then derived the percentage... what does the percentage tell you?
Using the standard normal table, the total probability to the right of z=2.18 and to the left of z=1.75 is?
What is one of the two differences between the way ZST or ZLT are calculated?
Can you please explain the 1.5 sigma shift they use in determining process sigma?
Alexa got 144 on her test which has a mean of 128 and a standard deviation of 34. What is her z-score?How do you calculate the z score for the raw score of 10 based on the following distribution: 8, 9