Suppose we have a panel data of of 100 firms over 20 years at a monthly frequency. We are interested in how firms’ bond ratings affect their investment. Give an example of an omitted variable that can be fixed by Fixed Effects or First Differences. Give another example of an omitted variable that cannot be fixed by Fixed Effects or First Differences

Q: Steel rods are manufactured with a mean length of 20 centimeter (cm). Because of variability in the…

A: μ =20 cmσ =0.07 cmNote : There no D)

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A:

Q: Consider the probability distribution shown below. x 0 1 2 P(x) 0.25 0.70 0.05 Compute the…

A: According to the given information in this question, we need to find the expected value and standard…

Q: The following table gives the weeks of gestation and corresponding birth weights for a sample of 5…

A: Weeks of Gestation, XWeight (in pounds), Y345367377.5388409

Q: Suppose that you are studying the number of vehicles owned by a US household. You find that the…

A: It is given asMean = 1.8Standard deviation = 2.9Sample size = 45

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A: Given, mortality follows DeMoivre's Law with a maximum age of 120Age, force of interest,

Q: Arm span and Height Estimating body disproportion is useful to assess the likelihood of a primary…

A: The following solution is provided below

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A: Null hypothesis:The distribution of fatal work injuries in the west is 42% transportation, 19%…

Q: 1. Suppose that, for some 0 ≤ p ≤ 1, U and V are two random variables with joint PMF if u = 0 and…

A: The joint PMF of the variables, (U, V) is given in tabular form as follows,U | V01Total0p/2(1-p)/2…

Q: 3: In a 1868 paper, German physician Carl Wunderlich reported based on over a million body…

A: Given the data of the body temperatures from a random sample of healthy adults asThe population…

Q: b) The masses of lemons can be assumed to follow a Normal distribution with mean 75 grams and…

A: (b) μ=75,σ=8

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A: We need to select the correct options with respect to the KSVD

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A: r=0.299

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A: given college algebra homework scores data is…

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A: In this problem, we are dealing with a system that consists of a finite-time integrator with a…

Q: Give conclusions that can be drawn from the graph. How Other Drivers Irk Us Too cautious 2%-…

A: The following solution is provided belowGiven data :Too cautious 2%Speeding 7%Ignoring signals…

Q: Suppose that a random sample of 50 bottles of a particular brand of cough medicine is selected and…

A: The following solution is provided below

Q: b) Five readings (x, y) were recorded and a summary of some of the results is shown below. Σx=35;…

A: (b) n=5, ∑x=35,∑y=405,∑x2=305

Q: Suppose that X has a normal distribution with the data value 44.2? If necessary, round to three…

A: Mean()=43Standard deviation()=and data value(X)=44.2

Q: For each of the following combinations of sample size and sample proportion, indicate whether the…

A: The confidence interval for sample proportion is given as:The required condition to find the sample…

Q: (a) Ho: p= 0.1, n = 40 appropriate O not appropriate (b) Ho: p= 0.6, n = 220

A: Here we use normal approximations condition. NOTE:- According to bartleby guidelines expert can…

Q: The following tables provides before and after performance results on a history quiz. In between, a…

A: Before lesson quiz resultsAfter lesson quiz results6101116611711141571581511178969

Q: Find the mean and standard error of the mean of the sampling distribution. Then sketch a graph of…

A: Sample size(n)=25mean()=$232Standard deviation()=$63

Q: Steel rods are manufactured with a mean length of 20 centimeter (cm). Because of variability in the…

A: (C) From the results of part (b),The proportion of rods will be discarded is, p = 0.0220 Sample…

Q: (b) Afly 0220 (Round to four decimal places as needed.). (c) Using the results of part (b), if 5000…

A: It is given asP( shorter than 19.84 or longer than 20.16 ) = 0.0220

Q: True or false: Suppose that the 98% confidence interval from question 2 was 10 ± 2.37. A correct…

A: Given 98% confidence interval from the question was

Q: Let p denote the proportion of students at a large university who plan to use the fitness center on…

A: According to the given information in this question, we need to find the p value of each of z scores…

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A: For the true mean 12 AM temperature, it is hypothesized that 98.6^oF \)" data-mce-style="cursor:…

Q: Call me: A sociologist wants to construct a 95% confidence interval for the proportion of children…

A: Given confidence level, C = 95% = 0.95 Level of significance, α = 1-0.95 = 0.05 Using formula,

Q: Consider that you have a data set with 1000 observations. You consider the following models: 1.…

A: Given that,The sample size is 1000 Observation. The following models are given:The objective is to…

Q: According to a doctor's estimation, the normal distribution N(6.4, 0.7) fits the adult femur length…

A: N(6.4, 0.7)Note:- According to the Bartleby guidelines expert solve only one question and maximum…

Q: When two purple flowers (RB) are crossed, there are four equally likely possible outcomes for the…

A: Number of possible outcomes, n(S) = 4

Q: or the following pairs, indicate which do not comply with the rules for setting up hypotheses, and…

A: Here, we have given some null and alternate hypothesis . Then, we have to find which pair is not…

Q: n Find the size of the sample needed to estimate the difference between the proportions of Democrats…

A:

Q: In a previous year, 56% of females aged 15 and older lived alone. A sociologist tests whether this…

A:

Q: For a population with = 80 and a = 10, what is the X value corresponding to z = -2.00? Question 15…

A: Given information:μ=80 Population meam σ=10 Population standard deviation z score = -2.00

Q: (C) Based on your answers to part (B), would you conjecture that the histogram is approximately bell…

A:

Q: If the average low temperature of a winter month in Rochester, NY is 13∘13∘ and the standard…

A: Consider a variable, X: low temperature of a winter month in Rochester.To find the probability(in…

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A: In the given question,confidence level = 90%margin of error (E) = $1000the standard deviation () =…

Q: Given the following: P(A) = 0.22, P(B) = 0.46, with A and B independent. Find: P(A or B) 0.5788…

A: P(A)=0.22P(B)=0.46A and B are independent soP(A and B)=P(A)*P(B)

Q: (h) What is the probability a randomly selected student earns an A or B on the homework (scores 80…

A: The given data represent the homework scores for random sample of students in a college Algebra…

Q: The number of hours 10 students spent studying for a test and their scores on that test are shown in…

A: XY037140251452463568571671780894

Q: The data below represent commute times (in minutes) and scores on a well-being survey. Complete…

A: Since you have posted a question with multiple sub-parts, we will solve first three sub-parts for…

Q: Patient Group MN Strain Positive Negative Unvaccinated 22 Vaccinated 2 Totals 24 Print Done 763 13…

A: 22729268241337

Q: Overall Grades 99 92 84 81 73 62 61 Step 1. Find the estimated slope. Round your answer to three…

A:

Q: Twenty years ago, 48% of parents of children in high school felt it was a serious problem that high…

A: Sample size, Number of parents of children in high school who felt students were not taught enough…

Q: Find the equation of the regression line for the given data. Then construct a scatter plot of the…

A:

Q: (a) Let's say we are interested in the effect of education on wage. wage = a + Beduc; + u , where…

A: Effect of education on wages is estimated by:Effect of father's education on education of the…

Q: The alternative hypothesis, significance level, and summary statistics are provided. Conduct the…

A: From the provided information,The hypothesis H1: p1 - p2 < 0

Q: Find the mean and standard deviation for each binomial random variable: n = 52, π = .80

A: Binomial distributionSample size : n = 52Probability of success : p = 0.80Find mean and standard…