What is the difference between balanced and unbalanced panels? A. Unbalanced panels have some observations missing,...
What is the difference between balanced and unbalanced panels?
A. Unbalanced panels have some observations missing, balanced do not.
B. Balanced panels are demographically representative of the population being studied, unbalanced are not.
C. Balanced panels have an equal number of observations above and below the mean of the dependent variable, unbalanced panels are skewed.
D. A balanced panel has T = N, an unbalanced panel has N>T or N
Homework Answers
A panel data set is said to be “unbalanced” is it does not contain all the time variable, => if some data are missing, => here the correct answer is “A”, => in "unbalanced panel" have some observation missing but "balanced" do not.
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What is the difference between balanced and unbalanced
panels?
A. Unbalanced panels have some observations missing,...
The amount of time required to reach a customer service representative has a huge impact on...
The amount of time required to reach a customer service representative has a huge impact on customer satisfaction. A study was conducted to see whether there is evidence of a difference in the mean amounts of time required to reach a customer service representative between two hotels. Two samples of data were collected (see below). Assume that the population variances in the amount of time for the two hotels are not equal. Hotel 1 Hotel 2 Mean 2.214 2.0115 Variance...
1)The range is a) the difference between the inner fences. b) the H-spread. c) not influenced...
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If two distributions have the same range, then what must be equal? a) their high and...
If two distributions have the same range, then what must be equal? a) their high and low data values 2. In a skewed distribution, the median is preferred over the mean as a measure of the center because a) the median is the most frequent number 3. If a distribution has a mean of 9 and five of the six data values are 6, 8, 11, 15, and 18, then the missing data value is: a) 0 4. Gail received...
1. If two distributions have the same range, then what must be equal? a) their high...
1. If two distributions have the same range, then what must be equal? a) their high and low data values 2. In a skewed distribution, the median is preferred over the mean as a measure of the center because: a) the median is the most frequent number İfadistribution has a mean of 9 and five ofthe six data values are 6, 8, 11, 15,and18,then the missing data value is: a) 0 4. Gail received a grade of 75 on her...
(10 points) The following regression output is available. Notice that some of the values are missing....
(10 points) The following regression output is
available. Notice that some of the values are missing.
Predictor Coef SE
Coef T P
Constant 5.932 2.558 2.320 0.068
x 0.511 6.083 0.001
Analysis of Variance
Source DF SS MS F P
Regression 648.72 648.72 57.20 0.001
Residual
Error 56.70
Total 16 705.43
Based on the information given, what is the value of sum of
squares of the X’s (SSxx)?
7626.92
23.142
535.591
None of the above
1. (10 points) Consider the following partially completed computer printout for a regression analysis Based on the information provided, which of the following statements is true at a...
please answer all question (2-5) thanks Question 2 1 pts As the number of hours a...
please answer all question (2-5) thanks
Question 2 1 pts As the number of hours a student studies increases, the number of errors made on the exam decreases. There is a strong relationship between these variables. Select the value for the pearson correlation (r) that would be appropriate 0-0.7 0-0.4 o 0.6 o 1.0 Question 3 1 pts The following APA summary was reported for a one-sample t-test (two-tailed, alpha = .05). t(15) = 3.3, p = .003 Which of...
1. ANOVA is a statistical method for verifying the equality between some sample means b. a....
1. ANOVA is a statistical method for verifying the equality between some sample means b. a. some sample standard deviations c. some population standard deviations d some population means Salary information regarding male and female employees of a large company is shown below Sample Size Male (Pop. 1) Female (Pop. 2) 49 47 Sample Mean Salary (in $1,000) , Population Variance 2. The point estimate of the difference μ-μ, between the two population means is Y 7-44-3.0 3. The margin...
1. (a) Explain clearly the difference between a population and a sample. (b) There are...
1. (a) Explain clearly the difference between a population and a sample. (b) There are 14 mountains in the world with heights greater than 8000 meters (m, = 26247 feet): can this group of 14 peaks be properly referred to as the population of peaks over 8000 m (Y/N)? (c) If we were to use the mean height of students in MAT-114 to estimate the mean height of students at Lincoln, do the students in MAT-114 represent a...
An air conditioning contractor has kept detailed records on the lifetimes of a random sample of...
An air conditioning contractor has kept detailed records on the lifetimes of a random sample of 250 compressors. She plans to use the sample mean lifetime, x, of those 250 compressors as her estimate for the population mean lifetime, u, of all such compressors. If the lifetimes of this brand of compressor have a standard deviation of 45 months, what is the probability that the contractor's estimate will be within 7 months of the true mean? The probability is (Round...
3. [Multiple Choice Questions (4 points per question, 32 points in total): Please answer the following...
3. [Multiple Choice Questions (4 points per question, 32 points in total): Please answer the following questions. 3.1 There is a random variable X with observations 3.5 Which of the following is implied from the law [X,,X2,...,X). It is known that these observations follow the normal distribution with mean μ and variance σ2. Which of the following will lead to a c? of large numbers? (a) If we have a sufficiently large number of observations, its sample mean is close...
If two distributions have the same range, then what must be equal? a) their high and low data values 2. In a skewed distribution, the median is preferred over the mean as a measure of the center because a) the median is the most frequent number 3. If a distribution has a mean of 9 and five of the six data values are 6, 8, 11, 15, and 18, then the missing data value is: a) 0 4. Gail received...
1. If two distributions have the same range, then what must be equal? a) their high and low data values 2. In a skewed distribution, the median is preferred over the mean as a measure of the center because: a) the median is the most frequent number İfadistribution has a mean of 9 and five ofthe six data values are 6, 8, 11, 15,and18,then the missing data value is: a) 0 4. Gail received a grade of 75 on her...
(10 points) The following regression output is
available. Notice that some of the values are missing.
Predictor Coef SE
Coef T P
Constant 5.932 2.558 2.320 0.068
x 0.511 6.083 0.001
Analysis of Variance
Source DF SS MS F P
Regression 648.72 648.72 57.20 0.001
Residual
Error 56.70
Total 16 705.43
Based on the information given, what is the value of sum of
squares of the X’s (SSxx)?
7626.92
23.142
535.591
None of the above
1. (10 points) Consider the following partially completed computer printout for a regression analysis Based on the information provided, which of the following statements is true at a...
please answer all question (2-5) thanks
Question 2 1 pts As the number of hours a student studies increases, the number of errors made on the exam decreases. There is a strong relationship between these variables. Select the value for the pearson correlation (r) that would be appropriate 0-0.7 0-0.4 o 0.6 o 1.0 Question 3 1 pts The following APA summary was reported for a one-sample t-test (two-tailed, alpha = .05). t(15) = 3.3, p = .003 Which of...
1. ANOVA is a statistical method for verifying the equality between some sample means b. a. some sample standard deviations c. some population standard deviations d some population means Salary information regarding male and female employees of a large company is shown below Sample Size Male (Pop. 1) Female (Pop. 2) 49 47 Sample Mean Salary (in $1,000) , Population Variance 2. The point estimate of the difference μ-μ, between the two population means is Y 7-44-3.0 3. The margin...
An air conditioning contractor has kept detailed records on the lifetimes of a random sample of 250 compressors. She plans to use the sample mean lifetime, x, of those 250 compressors as her estimate for the population mean lifetime, u, of all such compressors. If the lifetimes of this brand of compressor have a standard deviation of 45 months, what is the probability that the contractor's estimate will be within 7 months of the true mean? The probability is (Round...
3. [Multiple Choice Questions (4 points per question, 32 points in total): Please answer the following questions. 3.1 There is a random variable X with observations 3.5 Which of the following is implied from the law [X,,X2,...,X). It is known that these observations follow the normal distribution with mean μ and variance σ2. Which of the following will lead to a c? of large numbers? (a) If we have a sufficiently large number of observations, its sample mean is close...
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