(b) Compute the Durbin-Watson D statistic. Does it indicate a problem? For a series of this length, any value of D that is more than 0.64 away from 2 is statistically significant with p-value smaller than 0.01.Calculate D.D= (Round to two decimal places as needed.) Transfer Time (sec)38.4File Size (MB)Hours past 8:00 am8826.6750.422.5350.822.9561.21.627.46629.182219.1262.411.926.7242.8533.227.2743.630.872428.1744.439.3954.813.4305.218.9375.6

Given: Transfer time File size Hours past 38.4 88 0 26.6 75 0.4 22.5 35 0.8 22.9 56 1.2…

Answered: (b) Compute the Durbin-Watson D…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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. A random sample is obtained from a population with a mean of µ = 45. After a treatment is administered to the individuals in the sample, the sample is M = 49 with a standard deviation of s = 12. For a sample size of n = 9. Compute r2 and the estimated Cohen’s d to measure the size of the treatment effect. How effective was the treatment?
For random samples of size n = 25 selected from a normal distribution with a mean of µ = 50 and a standard deviation of σ= 20, find the range of sample means that defines the middle 95% of the distribution of sample means. What is the range from?
Suppose we are interested in studying a population to estimate its mean. The population is normal and has a standard deviation of o=10. We have taken a random sample of size n = 42 from the population. This is Sample 1 in the table below. (In the table, Sample 1 is written "S1", Sample 2 is written "S2", etc.) As shown in the table, the sample mean of Sample 1 is x = 74.5. Also shown are the lower and upper limits of the 75% confidence interval for the population mean using this sample, as well as the lower and upper limits of the 95% confidence interval. Suppose that the true mean of the population is u=75, which is shown on the displays for the confidence intervals. Press the "Generate Samples" button to simulate taking 19 more random samples of size n=42 from this same population. (The 75% and 95% confidence intervals for all of the samples are shown in the table and graphed.) Then complete parts (a) through (c) below the table. 75% 75% 95% 95% lower upper lower upper limit limit…
Kk.80.
A given distribution has a population mean, μ, of 135 and a population standard deviation, σ, of 9. What z-score would be associated with the value x = 169? Round to two decimal places, as needed.
domly? Test with a = .05. 6. Suppose that the researcher from the previous problem repeated the study of married couples' initials using twice as many participants and obtaining observed frequencies that exactly double the original values. The resulting data are as follows: Same Different Initial Initials 38 362 400 a. Use a chi-square test to determine whether the number of couples with the same last initial is significantly different that would be expected if couples were matched randomly. Test with a = .05. b. You should find that the data lead to rejecting the null hypothesis. However, in problem 5 the deci- sion was fail to reject. How do you explain the fact that the two samples have the same proportions but lead to different conclusions?
A given distribution has a population mean, μ, of 116 and a population standard deviation, σ, of 8. What z-score would be associated with the value x = 92? Round to two decimal places, as needed.
In an one-sample t-test, the value that is obtained for an observed t-score is determined by several factors. Which of the following would produce a SMALLER observed t-score (closer to zero)? A. Having a large n B. Changing the α from 0.05 to 0.01 C. the sample mean be very far apart from the population mean D. Having a large sample standard deviation
According to records, the amount of precipitation in a certain city on a November day has a mean of 0.10 inc 0.06 inches. What is the probability that the mean daily precipitation will be 0.11 inches or less for a random sample of 4 many years)? Carry your intermediate computations to at least four decimal places. Round your answer to at least three de 0 X
A given distribution has a population mean, μ, of 114 and a population standard deviation, σ, of 6. What z-score would be associated with the value x = 141? Round to two decimal places, as needed.

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(b) Compute the Durbin-Watson D statistic. Does it indicate a problem? For a series of this length, any value of D that is more than 0.64 away from 2 is statistically significant with p-value smaller than 0.01 Calculate D. D= (Round to two decimal places as needed.)