3. Add the variable abil (a measure of cognitive ability) to the regression frompart (2), and report the results in equation form. Does ability help to explainvariations in education, even after controlling for parents' education? Explain.4. Now estimate the equation where abil appears in quadratic form:educ Bo + Bimotheduc + B₂ fathedu+Bsabil +Babil² + uAssuming all else fixed, find the value of abil where educ is minimized (noticethat abil is measured so that negative values are permissible).5. Argue that only a small fraction of men in the sample have "ability" less thanthe value calculated in part (4). Why is this important?6. Using the estimated equation in (4), test the null hypothesis that educ is linearlyrelated to abil against the alternative that the relationship is quadratic.7. Add the two college tuition variables to the regression from part (4) and deter-mine whether they are jointly statistically significant.8. What is the correlation between tuit 17 and tuit18? Explain why using theaverage of the tuition over the two years might be preferred to adding eachseparately. What happens when you do use the average?9. Do the findings for the average tuition variable in part (8) make sense wheninterpreted causally? What might be going on?Problem 51. Explain what it means for an estimator to be consistent. How is it differentfrom the property of unbiasedness?2. Give an example of an estimator that is consistent but biased.

An estimator is a statistical method or formula used to estimate an unknown parameter or feature of…

Answered: Problem 5 1. Explain what it means for…

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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Give an example of estimators (or estimates) that are (a) unbiased and efficient, (b) unbiased and inefficient, and (c) biased and inefficient.
according to a study by Wakefield and evans the mean annual cheese consumption of cheeseylvanians is 36 pounds with a standard deviation 10.1 pounds . suppose a simple random sample of 38 cheeseylvanians is taken and the amount of cheese they eat is recorded for a year. A) describe sampling distribution of sample mean annual cheese consumption. b) what is the probability that the mean of those sampled are 34 or less c) would it be unusual for them to eat average of 30 pounds or less a year? Explain
The results obtained above were primarily due to the mean for the third treatment being noticeably different from the other two sample means. For the following data, the scores are the same as above except that the difference between treatments was reduced by moving the third treatment closer to the other two samples. In particular, 3 points have been subtracted from each score in the third sample. Before you begin the calculation, predict how the changes in the data should influence the outcome of the analysis. That is, how will the F-ratio for these data compare with the F-ratio from above? Treatment A Treatment B Treatment C 4 6. 7 3 9. 3. 4 3. F-ratio = p-value = Conclusion: O These data do not provide evidence of a difference between the treatments There is a significant difference between treatments Submit Question M hp
jake suspects that individuals with an optimistic world view live longer than individuals with a pessimistic view. Sate the research hypothesis the null hypothesis cases independent variable dependent variable
True or false? an unbiased estimator is preferable to an efficient estimator
On average, a sample of n = 36 scores will provide a better estimate of the population mean than a sample of n = 49 scores from the same population.
PLEASE DONT USE EXCEL
You should use a webpage to find the test stat for this problem, Also look at the p-value if the p-value is less than 0.05 there is strong evidence the variables are dependent (there is a difference in proportions). The following data set is the results of some market research were some people were shown one ending (ending 1) and other people were shown a different ending (ending 2), they were asked if they like the product (yes or no) Yes they liked the ending No they did not like the ending ending 1 15 85 ending 2 75 25 Which option below has all the correct options to the chi square test of independence?
Please tapy answer
Hello good day. I am having problem doing this. I need your help and hoping for a response on this matter. Thank you. Give a situation wherein a researcher would encounter a possible CONFOUNDING variable.
Keep in mind that the words in bold below have technical and formal meanings in statistics. "An estimator that is consistent must also be unbiased." True or False? Select one: True False
The results obtained above were primarily due to the mean for the third treatment being noticeably different from the other two sample means. For the following data, the scores are the same as above except that the difference between treatments was reduced by moving the third treatment closer to the other two samples. In particular, 3 points have been subtracted from each score in the third sample. Before you begin the calculation, predict how the changes in the data should influence the outcome of the analysis. That is, how will the F-ratio for these data compare with the F- ratio from above? Treatment A F-ratio= = p-value = 6 5 4 LO 5 5 Treatment B Treatment C 5 6 8 4 6 8 7 7 4 10

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Problem 5 1. Explain what it means for an estimator to be consistent. How is it different from the property of unbiasedness? 2. Give an example of an estimator that is consistent but biased.