Suppose random variable X follows a normal distribution with mean 10 and variance 16. Consider randomsamples of different sizes from that population to answer the following questions.Consider a sample of size n = 10. Download the data attached in the data table and use it to construct yourresponseFor n = 10, the sample mean = 8.774(Round your response to three decimal places)Consider a sample of size n = 100. Download the data attached in the data table and use it to construct yourresponse.For n = 100, the sample mean = 9.755(Round your response to three decimal places)Consider a sample of size n = 999. Download the data attached in the data table and use it to construct yourresponse.For n 999, the sample mean =(Round your response to three decimal places)

To find the sample mean for n = 999 , follow these steps:1. Upload the Data File: Make sure you…

Answered: Suppose random variable X follows a…

ENGR.ECONOMIC ANALYSIS

14th Edition

ISBN:9780190931919

Author:NEWNAN

Publisher:NEWNAN

Chapter1: Making Economics Decisions

Section: Chapter Questions

Problem 1QTC

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You estimated a linear regression model with 3 explanatory variables using a sample of 29 observations. You are asked to test the overall significance of the model.the F-statistics calculated is equal to 2.567 and the F-critical at 5% level is 3.028. The p-value of the test can be expressed as: Select one: O a. P(F(3,25)<=2.567) O b. 1-P(F(3,25)<=2.567) O c. P(F(3,25)<3.028) O d. 1-P(F(3,25)<33.28)
Sampling variation refers to a situation when there is uncertainty associated with a parameter estimate. researchers arrive at the precisely correct answers. different random samples lead to somewhat different estimates. there is variability across observations.
Suppose a researcher is interested in a new treatment plan for increasing CD4 cell count in immune-compromised patients with HIV. In order to investigate the new drug, the researcher gathers a group of 48 individuals with a mean CD4 count of 317 cells/mm3 after treatment with a standard deviation of 24.6. Test the hypothesis that the mean CD4 count has increased above the goal of 275 cells/mm3. Write out your hypotheses and correctly interpret your pvalue. (Use an alpha level of 0.01)
Suppose that 65% of rural households own a television set. Use an appropriate approximation, the probability that at most two-thirds of a random sample of 600 rural households will own a television set is?
Econometrics Thomas Eisensee and David Stromberg wanted to measure how much news coverage of a foreign disaster impacted the amount of disaster relief provided by the U.S. government. They argue that the simple relationship would be biased. Let X = Minutes of News Coverage and Y= Disaster Aid. Choose a variable X2 that could bias the simple relationship. This variable should impact the amount of coverage and impact the amount of aid for reasons other than purely news coverage. Eisensee and Stromberg introduce an instrument Z = During the Olympics. Explain how Z could satisfy the relevant and exogenous criteria. Explain how you could use Z to estimate the impact of X on Y free from X2 bias. Hint: you should mention two stages.
Samples of four salespeople from each of four regions were asked to predict percentage increases in sales volume for their territories in the next 12 months. The predictions are shown in the accompanying table.West Midwest South East6.8 7.2 4.2 9.04.2 6.6 4.8 8.05.4 5.8 5.8 7.25.0 7.0 4.6 7.6a. Prepare the analysis of variance table.b. Test the null hypothesis that the four population mean sales growth predictions are equal.
The lowest boundary of the model class with size 15 is 40.the frequency of this class is 7 .find the mode if frequencies of the classes preceding and succeeding the model class is 3 and 6 respectively
The following table was generated from the sample data of 10 newborn babies regarding the weight of the mother at birth, the weight of the father at birth, and the weight of the baby at birth. The dependent variable is the weight of the baby, the first independent variable (x) is the mother's weight, and the second independent variable (x2) is the father's weight. Intercept Coefficients Standard Error 20.430131 Mother's Weight - 1.048035 Father's Weight t-Stat p-value 2.323627 0.200737 8.792346 0.000316 -5.220929 0.003407 -0.934498 0.220528 -4.237555 0.008189 Step 1 of 2: Write the multiple regression equation for the computer output given. Round your answers to three decimal places. Answer How to enter your answer (opens in new window) ŷ = + x1 + x2 Copy Data Tables Keypad Keyboard Shortcuts
The management of a large firm would like to know something about employee morale and the other variables to which it may be related. To study these relationships, each employee in a simple random sample of 27 employees is interviewed and tested to obtain information concerning morale level and the average number of satisfying extra work social contacts experienced during a week. Whether or not the duties the employee usually performs are appropriate to the job title is also determined. The dependent variable Y is measure of morale, the quantitative independent variable, X1 is average number of social contacts, and the following dummy variable coding is used to quantify the qualitative variable: X₂ = 1 if yes, X₂ = 0 if no. The model including dummy variable and the interaction term was being estimated and a part of computer outputs is below:
Select the scenario which is an example of simple random sampling. Answer Keypad Keyboard Shortcuts Tables A mobile network operator wants to determine the mean age of its most active subscribers. A random sample of subscribers with the number of text messages exceeding 30 per day was chosen. City managers want to find out the public's opinion of a newly reconstructed road. They use a local TV station to encourage citizens to make a call to their hot line and share their experience. Half of the working-age population in the county is under 35 years old, and another half is over 35 years old. The county administration wants to estimate the mean O salary for the two age groups, so they select 500 working-age residents that are younger than 35 and 500 working-age residents that are older than 35 and ask them about their salary. O Two friends conducted a survey among their schoolmates to find out how much time schoolchildren spend reading books during the summer.
Suppose we regress y on an intercept and the dummy variable male, which takes the value 1 if the individual is male and 0 otherwise. We use a sample of 1000 individuals, where half of them are women. The average values of y for men and women in the sample are 7.5 and 8.5, respectively. Which of the following statements is true? a. The estimate of the slope is equal to 7.5. b. The estimate of the slope is equal to 8.5. c. The estimate of the slope is equal to -1. d. The estimate of the slope is equal to 1. e. None of the above. show your work neatly
a) What is the logic of probability sampling? b) c) V. Distinguish between broad objective and specific objective. Write brief notes on each of the following, giving appropriate examples: Simple random sampling ii. Systematic sampling iii. Sampling frame iv. Variable Parameter

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