Aboxof1000ticketshasanaverageof40andastandarddeviationof10.Two hundred and twenty-five draws will be made at random with replacement from this box. (a) What is the expected value of the average of the draws? _________ (b) What is the standard error of the average of the draws? _________ (c) If it is appropriate to use the normal approximation for the probability histogram of the average of the draws, explain why it is and then find the chance that the average of draws is greater than 41. If it is not appropriate, explain why not

Q: TOUR FEACK Do bonds reduce the overal risk of an investment portfolio? Let x be a random variable…

A: List of formulae :  Sample mean  :  x¯ =∑xn   Sample variance :  s2 = ∑x2 -∑x2nn-1  Standard…

Q: (a) Show that for a Poisson distribution the mean is equal to the variance. (b) In a bakery 3600…

A:

Q: True or false? The sampling distribution of "1"2 is used to make inferences about degrees of freedom…

A: Given:

Q: Which of the following is TRUE about the variance of the sampling distribution of sample means? It…

A:

Q: 22 We denote the population variance with the symbol N M x σ 8² 0² $ O n

A: We have to determine which statement is true for given situation.

Q: a. The Critical Value F o = b. The Test Statistic F = Corclusion

A: Solution:

Q: (a) When comparing means of two samples where nı = 20 and n2 = 40, we can use the normal model for…

A: a) False  Reason:Both the sample size should be greater than 30.

Q: Marks obtained by a group of 200 students have a mean of 30 & variance of 25. Assuming these marks…

A:

Q: Finding the Mean, Variance, and Standard Deviation of a Binomial Distribution About 8% of the…

A: Solution :  Given : n = 1000             p = 0.08             q  = 1- p = 0.92 For Binomial…

Q: 0.064. At a = 0.005, is there enough evidence to reject the claim?

A: HERE GIVEN , sample variance  = s2 =  0.064 sample size  n = 28  significance level = 0.005

Q: A union of restaurant and foodservice workers would like to estimate the mean hourly wage, μ, of…

A: There are two types of errors that occurred in the hypothesis testing. They are: Type I error Type…

Q: What is the probability that: Exactly 3 homes have computers. (ii) More than 3 homes have computers…

A: Let p be the probability that a home has computer. Given that p = 0.60 Ley X denote the number of…

Q: exlpain please The uniform distribution U(a, b) ; calculation of probabilities, calculation of its…

A: We will exaplain all things about uniform distribution.

Q: Seventy-seven percent of adults want to live to age 100. You randomly select five adults and ask…

A: Number of samples (n) = 5 Probability of success (p) = 77% = 0.77 I will use excel formula…

Q: or the following scenario, choose the appropriate statistical test. CENARIO: The police department…

A: Day of the week No. of calls Monday 114 Tuesday 152 Wednesday 160 Thursday 164 Friday 179…

Q: Fast answer please

A: The question is asking whether the variance of the product of two independent random variables X and…

Q: The t test for the difference between the means of two samples makes what assumption? a Samples are…

A: Solution-: The t test for the difference between the means of two samples makes what assumption?…

Q: 65% of U.S. adults think that political correctness is a problem in America today. You randomly…

A: Given that  Success of probability p =0.65 Number of trials n=6 X~binomial ( n , p) NOTE:- According…

Q: The accompanying data table lists leading digits of 317 inter-arrival Internet traffic times for a…

A: From given  χ2=20.9222 Critical χ2=15.5073

Q: (9) There are 300 questions on a multiple choice exam. For each question there are 5 choices to…

A: Given sample size(n)=300Each question has 5 choices and there is only one correct…

Q: The mean of all the sample means obtained from all random samples of a certain sample size in a…

A: Here, we have sample mean is an biased estimate of the given random sample.

Q: pendence for a 2 by 5 table has 4 degrees of freedom. True (b) The p-value for  test is calculated…

A: a). The degree of freedom for chi square test of independence is given as df=(r-1)*(c-1), where…

Q: Mustration 23. Bring out the fallacy, if any, in the following statement : (a) The mean of a…

A:

Q: Make the statistical analysis for all of data given into table below using Excel program. Show your…

A: Given :  COUNT X 1 0.244(N) 2 0.234(N) 3 0.247(N) 4 0.231(N) 5…

Q: Thirteen percent of U.S. employees who are late for work blame oversleeping. You randomly select…

A: Solution: Note: Hello! As you have posted more than 3 sub parts, we are answering the first 3…

Q: When is your sampling distribution normal? When your data non-normal and your N50 when your data…

A: Central limit theorem Let X1,X2,X3,....,Xn be a random sample from any distribution. If n is very…

Q: Population Standard Deviation (Definitional Formula) Using the definitional formula, determine the…

A: We have given that the data of numbers of cups of coffee consumed by each of the workers at a print…

Q: Thompson and Thompson is a steel bolt's manufacturing company their current steel boats have a  Mean…

A:

Q: Up to One-Way Between-Groups ANOVA What analysis could be used to find out if the number of serial…

A: We have to determine level one option is correct choice.

Q: E3 discuss and compare the results of descriptive statistics for the stock returns of Ha Do group…

A: Let's first describe the center of the data : for HA DO GROUP : In these results, the mean stock…

Q: Question 4 946 red firs 217 A buyer must decide whether or not to accept a shipment of 40 parts. The…

A: Solution-: Given: N=40,M=5, n=6 Our aim to find, (a) P(accept shipment no defective parts are…

Q: 8. Normal approximation to Binomial distribution (a) State the conditions for being able to estimate…

A: Since there are multiple sub-parts and complete question for c and d parts are missing, the first…

Q: The variability of the scores in a sample tends to be _____ the variability of the scores in the…

A: As, we know that larger the size of population,  larger the variability in the population,  if we…

Q: Explaination about Analysis of Variance When There Are Two Independent Variables: The Two-Factor…

A: We have to  Describe ANOVA analysis of variance for both one way and two way.

Q: Excel Inferences of population variance(s): Buyer’s Digest Case Buyer’s Digest rates thermostats…

A: Solution:  Given information:  n=10 Sample size σ2= 0.5 Population variance

Q: e or fals

A: The statement given is that ,  As a general rule , the normal distribution is used to approximate…

Q: In sample surveys, what is meant by bias? O A systematic error in a sampling method that leads to an…

A:

Q: A game is played by throwing 3 dice. You will win in this game if the summation of the scores of…

A: Given data A dice is thrown 3 times Win if sum on 3 dice is 3,4,17,18 3 will come 1 time i.e.…