2. The SAT scores for 12 randomly selected senior high school students are:122113421298987786 1439671 1299 1020 1380889 1157a.) sample mean =b.) s²=c.) s =d.) Are the SAT scores normally distributed (Explain Why)? YES or NOe.) Construct and interpret a 95% confidence interval for the mean SAT score.

Step 1:a. Sample mean:To calculate the sample mean, we add up all the scores and divide by the…

Answered: 2. The SAT scores for 12 randomly…

ENGR.ECONOMIC ANALYSIS

14th Edition

ISBN:9780190931919

Author:NEWNAN

Publisher:NEWNAN

Chapter1: Making Economics Decisions

Section: Chapter Questions

Problem 1QTC

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A publisher reports that 50%50% of their readers own a particular make of car. A marketing executive wants to test the claim that the percentage is actually different from the reported percentage. A random sample of 240240 found that 45%45% of the readers owned a particular make of car. Determine the P-value of the test statistic. Round your answer to four decimal places.
PLEASE ANSWER CORRECTLY FULLY MAKE SURE THE ANSWER IS 100% RIGHT NO MISTAKES PLEASE
10. Student A in our class ECON 2210 tried to estimate the average marks of the midterm held in March, 2022. Based on a random sample of 30 students' marks and with a 95% confidence level, the student arrived at an interval estimate for the average marks of between 50 and 80. (a) After receiving this result, student B in the same class claimed that there was a 95% chance that the true average marks of the midterm were between 50 and 80. How would you respond to this statement? Is it correct? Why or why not? (b) Student C in the same class did not agree with student B and he claimed that there was a 95% chance that the true average marks of the next midterm were between 50 and 80. How would you respond to this statement? Is it correct? Why or why not?
Population Sample 35 30 24 32 32 28 35 31 34 20 24 24 26 29 32 35 32 37 35 Using sample data determine the Sample Mean?
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OA large city hospital conducted a study to investigate the relationship between the number of unauthorized days that employees are absent per year and the distance (miles) between home and work for the employees. A sample of 10 employees was selected and the following data were collected. D Excel file: data14-13.xlsx Distance to Work Number of Days (miles) Absent 8. 8. 9. 8 6. 10 12 14 14 4 18 If required, enter negative values as negative numbers. a. Select the correct scatter diagram for these data. A. Number of Days Absent 10+ 8+ . 6- 2+ 8. 10 12 14 16 18 20 Distance to Work (miles) 4.
7. A television station wishes to study the relationship between viewership of its 11 p.m. news program and viewer age (18 years or less, 19 to 35, 36 to 54, 55 or older). A sample of 250 television viewers in each age group is randomly selected, and the number who watch the station’s 11 p.m. news is found for each sample. The results are given in the table below.
UBC coaching center has two branches in Dhaka: one in Dhanmondi (Branch A) and another one in Mohammadpur (Branch B). To understand their students' performance, the coaching center conducts the same test in both branches. A sample of 8 students have been selected from branches A and B respectively, and the following table shows data on their performance. Use appropriate non-parametric methods on the data to find out whether there is a statistically significant correlation between the ranks of the students’ performance of the two branches.?
11 The sample data provides that ______ fraction of variations in the life insurance policy is explained by income. a 0.8120 b 0.8548 c 0.8998 d 0.9471
We have estimated the impact of gross domestic product (GDP), energy consumption (ENERGY) and population (POP) on CO2 emiisions (CO2) in Cyprus. The results are as follows, Dependent Variable: CO2 Method: Least Squares Date: 04/20/17 Time: 09.46 Sample: 1990 2013 Included observations: 24 Variable Coefficient Std. Error t-Statistic Prob. GDP ENERGY POP 2.002813 0.022114 -0.734352 0.203927 6.458672 0.011872 0.328388 0.293686 0,310097 1.862670 -2.236233 0.694371 0.7597 0.0773 0,0369 0.4954 R-squared Adjusted R-squared S.E. of regression Sum squared resid Log likelihood F-statistic Prob(F-statistic) 0.825079 Mean dependentyar 0.798841 0.048515 Akaike info criterion 0.047074 Schwarz criterion 40.75460 Hannan-Quinn.criter. 31.44583 Durbin-Wats on stat 0.000000 3.625982 0.108170 -3.062883 -2.866541 -3.010793 1.410912 S.D. dependent yar a Write down the economie function for the above estimation by using the information obtained from above table| b- Write down the economic model for the above…
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Pop. Mean Stand. Dev. Sample size 1 73.00 10.00 6.00 14 2 62.50 8 1.Independent random samples are selected from two populations. Below are selected summary statistics. (a) Construct the 95% confidence interval for μx-µY. (b) Obtain the P-value for the alternative µx =µY.

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