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!
Question - A high-school department made a change in its curriculum. One of the instructors in the department suspected that the change would result in a lowering of math skills. Students in the old program showed a mean of 70 points on a mathematics proficiency exam. Forty-two students from the new program had the scores in the dataset MATHEMATICS TEST SCORES (attached). The standard deviation of the all students over the years has been 10.34. Use a 2% level of significance.
a. Set up a hypothesis test
i. State the null and alternative hypothesis
ii. Confidence intervals of scores and the z or t intervals.
b. What are the results of the test (do the data indicate that the new program results in a lowering of math skills).
c. Do a P test. Are the two tests consistent?
d. Should the department us the new curriculum and why?
Give the name of the kind of sampling that was most likely used in each of the following cases: a Wall Street Journal poll of 2,000 people to determine the president's approval rating
BMI in children is approximately normally distributed with a mean of 24.5 and a standard deviation of 6.2. A BMI between 25 and 30 is considered overweight. What proportion of children are overweight?
Suppose that we use the same idea, but instead of ordinary averages we use weighted averages with as the weight for the th factor-level combination. Derive the new zero-sum restrictions for these weighted averages.
q1.acid rain has caused many lakes to become more acidic. a lake is considered nonacidic if the ph level is greater
A campus program evenly enrolls undergraduate and graduate students. If a random sample of 4 students is selected from this program to be interviewed about the introduction of a new fast food outlet on ground floor of the campus building, what is ..
a businessweek north american subscriber study collected data from a sample of 2861 subscribers. fifty-nine percent of
Suppose that plants of a particular species are randomly dispersed over an area so that the number of plants in a given area follows a Poisson distribution with a mean density of λ plants per unit area. If a plant is randomly selected in this area..
according to most estimates 10 of the people in the general population are left-handed and 90 are right-handed. a
The letters were rotated away from 0 degrees. Interestingly, reaction time decreased after 180 degrees. Can you explain why this might occur?
Using the 0.025 level of significance, test whether the median purchase price of all homes sold in that area of the city during 2001 could have been less than $172,300.
How would you find the normal approximation to the binomial probability P(x = 5) in part A? Please show how you would calculate u and standard deviation in the formula for the normal approximation to the binomial
given the heights of women are normally distributed with a mean of 63.6 inches and a standard deviation of 2.5 inches.
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