Identify the t stastic & the pvalue A credit score is used by credit agencies (such as mortgage companies and banks) to assess the creditworthiness ofindividuals. Values range from 300 to 850, with a credit score over 700 considered to be a quality credit risk.According to a survey, the mean credit score is 705.4. A credit analyst wondered whether high-incomeindividuals (incomes in excess of $100,000 per year) had higher credit scores. He obtained a random sample of 44high-income individuals and found the sample mean credit score to be 719.1 with a standard deviation of 80.6.Conduct the appropriate test to determine if high-income individuals have higher credit scores at the a=0.05 level ofsignificance.State the null and alternative hypotheses.Но н705.4H₁:µ > 705.4(Type integers or decimals. Do not round.)Identify the t-statistic.to = (Round to two decimal places as needed.)

That is, there is no evidence to conclude that the mean credit score is greater than 705.4 That is,…

Answered: A credit score is used by credit…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Q4) An analyst gathered the following information for a stock and market parameters: stock beta = 0.74; expected return on the Market = 8.40%; expected return on T-bills = 2.10%; current stock Price = $5.40; expected stock price in one year = $14.05; expected dividend payment next year = $1.08. Calculate the a) Required return for this stock b) Expected return for this stock
The lowest portfolio risk will result when the asset returns are perfectly positively correlated. Select one: True False
1a) Derive a maximum-liklihood estimator for the unknown parameter Y 1b) An experienced sales person completes sales following a Poisson distribution, with a mean rate of Y = 1.8 sales/month. A junior sales person completes sales at a mean rate of Y = 0.85 sales per month Find the probability of the joint sales team (experienced and junior) completing exactly 2 sales in any given months, assuming the two sales people act independently of each other. 1c) Find the probability of the joint sales team (experienced and junior) completing more than 2 sales in any given months
Suppose model (XY, XZ, YZ) holds in a 2 x 2 x 2 table, and the common XY conditional log odds ratio at the two levels of Z is positive If the XY and YZ conditional log odds ratios are both positive or both negative, show that the XY marginal odds ratio is larger than the XY conditional odds ratio.
Explain the meaning of unit root stochastic process
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7
In a continuous-time surplus model, the claim severity is distributed as BN(2, 0.4). Determine the Lundberg upper bound for the probability of ultimate ruin if the initial surplus is 2 and the prIn a continuous-time surplus model, the claim severity is distributed as BN(2, 0.4). Determine the Lundberg upper bound for the probability of ultimate ruin if the initial surplus is 2 and the premium loading factor is 0.25.emium loading factor is 0.25.
A disk drive has a constant failure rate and an MTTF of 5000 hr. (a) What will the probability of failure be for one year of operation? (b) What will the probability of failure be for one year of operation if two of the drives are placed in active parallel and the failures are independent? (d) What will the probability of failure be for one year of operation if the system si changed to standby model. (e) Describe the effect on the MTTF with a switching failure probability of 0.05. () What would be change in MTTF if the probability of failure of standby unit is 10 percent of the failure of the primary unit in the standby mode?
Exercise 2. A r.v. X is Poisson distributed with parameter λ = 5.5. (a) Calculate the probability that X = 3. (b) Calculate the probability that X < 2. (c) What is the most likely (i.e. highest probability) value for X ? (You can make a graph of f(x) to find the answer).
Plz provide answer for part a asap (a) Bernoulli process: i. Draw the probability distributions (pdf) for X ∼ bin (8, p) (x) for p = 0.25, p = 0.5, p = 0.75, in their respective diagrams. ii. What kind of effect has a higher value for p on the graph, compared to a lower value? iii. You must hit a coin 8 times. You win if there are exactly 4 or exactly 5 coins, but otherwise lose. You can choose between three different coins, with pn = P (coin) respectively p1 = 0.25, p2 = 0.5, and p3 = 0.75. Which of the three coins gives you the highest probability of winning?
local gym has only one treadmill machine for cardio exercises. Suppose exponential interarrival times with mean of 2 per hour, and exponential usage times with mean of 30 minutes per customer. Suppose a person has just arrived at 12.00 noon to use Assume your the machine. What is the probability that the next arrival will come before 1.00 pm, between and after 2.00 pm? Note that you have to provide three 1.00 pm and 2.00 pm, answers, one for each. Suppose no customer arrives before 1.00 pm. What is the probability that the next arrival will come between 1.00 pm and 2.00 pm? What is the probability that the number of arrivals between 1.00 pm and 2.00 pm will be zero (one, more than one)?

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