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!
A professor in the psychology department would like to determine whether there has been a significant change in grading practices over the years. It is known that the overall grade distribution for the department in 2000 had 14% As, 26% Bs, 31% Cs, 19% Ds, and 10% Fs. A sample of n=200 psychology students from last semester produced the following grade distribution:
A
B
C
D
F
32
62
61
28
17
Do the data indicate a significant change in the grade distribution? Test at the .01 level of significance.
A sample of 36 packages reveals the mean weight to be 3.01 pounds, with a standard deviation of 0.03 pounds. Determine a 95 percent confidence interval for the population mean.
To estimate this proportion he went to a large student parking lot during the middle of a class day. He found that 325 out of 1037 cars (31%) were red.
A final exam in Statistics has a mean of 73 with a standard deviation of 7.73. Assume that a random sample of 24 students is selected and the mean test score of the sample is computed. What percentage of sample means are less than 70?
What is the probability that the cereal would be high calorie? In other words, what is P (high calorie)?
What are the mean, variance and standard deviation of the data? provided? What is the probability of occurrence (percentage) of ± 2 standard deviations?
question 1 what is a chi-squared test? provide a fully referenced explanation.question 2 provide a brief example on a
Represent (X,Y) as a function of (U,V). Find the joint density f(u,v) for (U,V) (Hint: take into account the region where it is non-zero). Calculate f(1,0) and input it as the answer.
Suppose it has been determined that the average number of customers waiting for service is 1.929. There are two servers. Determine:
As it is a 2 × 2 table, try also two-tailed two-sample z test for π 1 = π 2 and verify that z 2 is same as your chi-square statistic. Which test do you prefer? Explain why?
The scores on the certain test are "normally distributed with mean 61" and "standard deviation 3". Determine the probability that the sample of 100 students will have the mean score of at least 61.3?
Do these measures of central tendency agree? Explain. What could the measures of dispersion tell us about the results of the quiz?
Use differential calculus to find both sales volume at which revenue is maximised and the maximum revenue available from sales of product X.
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