Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Suppose that random samples of college freshman are selected from two universities - 15 students from school A and 20 students from school B. On a standardized test, the sample from school A has an average score of 1000 with a standard deviation of 100. The sample from school B has an average score of 950 with a standard deviation of 90. (Assume the test scores came from normal distributions in both schools.)
A 90% confidence interval estimated the difference in test scores at the two schools to be 50 + 55.66.
1) Interpret the confidence interval in the context of this problem.
2) Based on this confidence interval, what conclusion would we reach if we tested the hypothesis that there is no difference in test scores between the two universities? Explain.
3) Suppose a state official admitted that there was a typo in the report of the analysis done and that the 90% confidence interval was actually 50 + 5.66. How would this impact your interpretation of the interval and the conclusion of the hypothesis test (in other words how would your answers to #1 and #2 change)?
A study of hikers in Grand Canyon National Park in the 1980s concluded that 30% of all hikers express a preference for lessdeveloped areas.
Using the 0.025 level of significance, determine whether the three brands could have the same population mean for this test object.
A sample of 15 items is placed on test with the eight failures occurring at the following times (in hours): 400, 430, 435, 460, 460, 490, 520, 530. Based on Handbook H-108, should the lot be accepted?
Consider the following problem associated with synchronizing traffic lights. A particular traffic light has a cycle as follows:
To compute all the descriptive statistics for the following set of three test scores over the course of a semester. Which test had the highest average score? Which test had the smallest amount of variability?
If the input to a linear filter is a random telegraph process with zero-crossings per second and an amplitude A, determine the output PSD.
a drivers reaction time in response to another car changing lanes is normally distributed with a mean of 0.4 seconds
A random 5-card poker hand is dealt from a standard deck of cards. Find the probability of each of the following possibilities (in terms of binomial coecients).
You decide to flip it 200 times and to conduct a binomial test with the data you collect. Suppose the coin is actually biased so that it comes up heads
If you select a random sample of 100 sessions, what is the probability that the sample mean is between 7.8 and 8.2 minutes?
A card is randomly selected from a standard deck. Find the probability that the card is between four and eight (inclusive) or is a club.
He is twice as likely to visit city X than the other city. Obtain the transition probability matrix. Also determine the proportionate visits by him to each of the cities in the long run.
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +1-415-670-9521
Phone: +1-415-670-9521
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd