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15 vehicles , 48.3 46.9 46.8 44.6 40.2 38.5 34.6 33.7 28.7 28..7 24.8 10.8 10.4 6.9 -12.4. Construct and interpret a 90% confidence interval to estimate the mean fuel savings in the population of all such vehicles.
Assume 41% of all American adults have some college education. American adult is randomly selected. Determine the probability that adult owns stock or has some college education?
One group of students studie20 minutes a day for 1o days. the second group study once at the end of the coures but for 200 minutes. what is a onetial test?
How to decide whether your test should be one-tailed or two-tailed/directional or non-directional. Gives an example of each type, with an explanation of why it is/is not directional.
When doing hypothesis testing we have two ways of making a decision - the critical value method and the p-value method. While both give the same results in terms of determining whether to reject or not reject the null hypothesis
Suppose the population standard deviation is 0.3 minutes and the sample mean is 9.975. Find the sample mean and compute. A 90-percent confidence interval for the true mean delivery time, is?
A researcher plans a study in which a crucial step is offering participants a food reward. It is important that the three food rewards be equal in appeal.
What is a prime number, and why are prime numbers important? What do you call a number that is not prime? What is the largest prime number ever found?
Determine the average amount of time that a guest spends checking in. How would this change under each of the state options?
Assume the probability that a person has the desease is 0.08 for all people, independently of each other. Compute the total expected number of tests necessary.
Flip the tree. Label all endpoints, supply all branch probabilities, and calculate and label an endpoint probabilities.
Suppose standard deviation stays same, how much do you have to decrease your average production time so that 95% of time you can deliver product in under 75 hours?
What step-by-step methods might make this material easier to learn and internalize? Are the formulas really as terrifying as they might first appear?
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