b) A population of size x is decreasing according to the law dx -x dt 250 where t denotes the time in days. If initially the population is of size xo (that is, when t = 0,x = xo) find how long it takes for the size of the population to be halved.

Q: Suppose that you are interested in determining the average height of a person in a large city. You…

A: Standard deviation is a proportion of how much variety or scattering of a bunch of values. A low…

Q: The owner of a large car dealership believes that the financial crisis decreased the number of…

A: the level of significance noted as the probability of rejecting the null hypothesis.  At a 5%…

Q: For a population with a mean = 440 and a standard deviation = 110, what is the X value corresponding…

A:

Q: f(x) is not continuous at x=-1, because:

A: A function is said to be continuous if the line in the curve is a smooth continuous graph. In other…

Q: Consider the mean cost of getting a four-year college degree.  The middle interval which captures…

A: In this question we have to find out the population mean cost of getting a college degree with the…

Q: If someone's gross annual income has a z-score of positive 2, what can be concluded? Their income is…

A: Z-score of gross annual income=+2 The connection between a value and the mean of a group of values…

Q: You have joined GoodMonth tire in Virginia. Your job is a reliability engineer. New tires are being…

A: given     Number failed Miles      Driven      Tire Miles           1                     10,000…

Q: 13. IfQ-K12L2 the MP, is a. diminishing b. increasing C. constant d. not enough information to…

A: Given: The production function:  Q = K1/2L1/2 To Find: The marginal product of labor (MPL):

Q: According to Chebyshev's theorem, at least what percentage of the observations in a data set will…

A: Chebyshev’s theorem is applied to find out the proportion deviation of the datasets from the means.…

Q: If multicollinearity problem exists in eqution SSS which of the following statements is true? O a.…

A: It decreases the exactness of the gauge coefficients, which debilitates the measurable force of your…

Q: d) Suppose the grading method changes, the new method is now the simple average of both midterm and…

A: Answer-

Q: or all parts of this question, assume that the log of GDP per capita is normally distributed with a…

A: Given  Mean of log GDP per capita =8.7 Standard deviation =1.5 We have to calculate the value of…

Q: Which one of the following is the most appropriate as a definition of R^2 (R- squared) in the…

A: R-squared (R2) is a measure of the proportion of the variance for a dependent variable that's…

Q: Analysis of data always involves use of samples that may or may not be randomly selected from the…

A: Data analysis refers to the process of gathering relevant information from the given data to make…

Q: Find f'(x). f(x) = - 12 In x + 11x - 11

A: The function will be differentiated with respect to x.

Q: f the E(u|X) does not equal 0.   How can this assumption be relaxed if the sample size grows…

A: The CLRM is the most basic regression model which includes zero mean of the error given a value of…

Q: The mean was found to be u = 70 so now we need to find the standard deviation o. The standard…

A: Standard deviation is a measure of spread of data around mean of the data. Higher the standard…

Q: EXERCISE 14. Suppose the net reproductive number (i.e. the ratio between the birth and the death…

A: Given: Net Reproductive number = Birth Rate/ Death Rate = 1.2 Death Rate = 0.012

Q: The individual actually The data represent the results for a test for a certain disease. Assume one…

A: The given table is:   Yes No Total Positive 132 9 141 Negative 31 128 159 Total 163 137…

Q: Suppose you conduct a test and your p-value is equal to 0.0

A: Given that, p - value = 0.002 . Here we have to conclude on the basis of alpha.

Q: An estimator that is correct (i.e., it is equal to the true population parameter ) more than half of…

A: In economics, an estimator refers to a specfiic variable used by the researcher to get an estimation…

Q: Given the following statistics, calculate the lower bound (value) for the 95% Confidence Interval…

A: As given data A bar = 9.2 Standard deviation = 1.8 N = 784.

Q: The critical value of F4, 00 at the 5% significance level is: А. 3.84. В. 2.37. С. 1.94. D. Cannot…

A: Given: Critical value=F4,∞ Significance level=5%

Q: Verify that a homogenous function has IRS, CRS or DRS depending on whether the degree of the…

A: A homogeneous equation is an equation when the solution is s and the scalar is l, then the product…

Q: Instrumental variables can be used to recover unbiased estimates when there is a problem with…

A: please find the answer below.

Q: Classify the random variable as either discrete or continuous. The number of runs scored in a 9…

A: Random variable- Infinitively, by a random variable (r,v) mean a real number X associated with the…

Q: If R2 = 1, it means that all of your errors are large O your model is no better at predicting Y than…

A: The R square is a statistical measurement that looks at how variations in one variable may be…

Q: 1- If more then one sample is selected from the universe, these samples should be (heterogeneous or…

A: Sample is the selected things which represent the universe. For example, if the sample is derived…

Q: Consider the hypotheses below. Ho: p = 50 H: µz 50 Given that x= 55, s 8, n D20, and a =0.10, answer…

A: We have given that  H0 = 50HA  ≠50 x¯= 55,  s = 8, n= 20 and α =0.10 We have to check which…

Q: Suppose a random sample population correction factor if appropriate. Round your answers to two…

A: given   Sample size (n) = 30 Population standard deviation (σ) = 8 Formula: The standard error of…

Q: Suppose you randomly select a sample of 16 observations from a population with u = 8and o = 2You…

A: Number of observations = 16 μ = 8δ = 2x¯ = 7

Q: In the days when the epidemic started, the price of the mask, which is normally $ 0.25 , has climbed…

A: Qd = a - bPQs = -c + dP Since the intercept of supply curve is negative, supply curve will touch the…

Q: During an evolution, the minimum, maximum, and average fitness of a population is 1.2, 270, and 40,…

A: From the available information, one gets to know that    Minimum fitness of population is 1.2…

Q: Given the following data .Find the OLS estimators using the deviation method. Y 6 10 9 14 7 5   X1…

A: Y X1 X2 6 1 3 10 3 -1 9 2 4 14 -2 6 7 3 2 5 5 4 Using excel, we get the regression…

Q: State the property of an estimator that gives a correct estimate of the population parameter of…

A: The population parameter of interest is that part of the population from which the researcher tries…

Q: Suppose a random sample of size 54 is selected from a population with o = 11. Find the value of the…

A:

Q: A sports shop selects a random sample and records the sales of items made in China and those made in…

A: SE (standard error)- It is the approx standard deviation of a sample population of statistics.

Q: You extract approximately 5,000 observations from the Current Population Survey (CPS) and estimate…

A: "Regression" comes from "Regress" which means to return (to something). In that sense, Regression…

Q: In interval estimation of a population parameter, increasing the sample size would a reduce the…

A: The formula for calculating interval for the population parameter  C.I=point estimate±margin of…

Q: Let (X1,. Xn) be an i.i.d. sample from X, where Var(X) < 00. Suppose you wish to estimate E[X], and…

A: * SOLUTION :-  (4)   The OPTION is TRUE is correct answer.   Based on the given information the…

Q: 1. If the R-square (R2) = 0.4 and the sample size N = 11. Furthermore, suppose that the number of…

A: A regression model provides a function that describes the relationship between one or more…

Q: If the critical value of "t" is 1.699, and significance level "a" is 5% .Find the sample size.

A: Given: Critical value = 1.699 Level of significance = 5%

Q: "Why can’t I just test the individual coefficients one at a time"? is this approach is unreliable?

A: Consider the following regression function: Y = bo + b1X1 + b2X2 Start by assuming the null…

Q: The lowest boundary of the model class with size 15 is 40.the frequency of this class is 7 .find the…

A: Given: Lower class(l)=40Size  (h)=15Frequency of modal class(f1)=7Frequency of class preceding modal…

Q: 26. Expedia would like to test that the average number of Southwest Airlines flights which arrive on…

A: Expedia would like to test that the average number of southwest Airlines flights which arrive on…

Q: A parameter is Select one: a. a function that is computed from the sample data. b. a value that has…

A: DISCLAIMER  “Since you have asked multiple question, we will solve the first question for you as per…

Q: In 2008, SAT math scores were normally distributed with a mean of 522 and a standard deviation of…

A: Given data:   Option ( d ) is Correct    =0.6827

Q: If the expected age of death for a male aged 20 is 75, then a 20-year-old man who dies it's…

A: The expected age of death for a male with the age of 20 = 75, Then if a 20-year-old man dies in a…

Q: In the linear model, E(u) = %3D O A. unknown. Ов. B. a number close to zero but only with…

A: With n either being large or small, the predicted value of the error term has always been zero. The…

Q: Create log(u^2 ) by first squaring the OLS residuals and then taking the natural log.

A: u 2 can be written as: u 2 = ò2 exp(§0 + §1x1 + §2x2 + … + §k xk)v where, ò is the variance x1, x2,…