IEE380 Final Exam Questions and Answers Already Passed Latest Update

IEE380 Final Exam Questions and Answers Already Passed Latest Update Using the notation from the text, which of the following is analogous to "b" in the linear model, y = mx + b? - Answers β0 Using the notation given in the text, which of the following estimates the slope in a simple linear regression model? - Answers β1 hat You have determined L and U such that P(L sigma1^2/sigma2^2 U) = .95. What number will be in the this confidence interval if you fail to reject the null hypothesis H0: sigma1^2 = sigma2^2 ? - Answers 1 When reading the Excel output for a randomized complete block design, you use the p-values in the "Columns" row if your treatments are presented in the Excel sheet in _______ - Answers columns The number of items in a random sample is denoted as _______. - Answers n If X is the face value for the throw of a fair die, the name of the probability distribution of X is the - Answers discrete random variable If random variable X has a/an _______________ number of values in a finite interval of its range, X is continuous. - Answers infinite An experiment that is repeated in the same manner every time but that can result in different outcomes is called a _______________ experiment. - Answers random what are the random variables - Answers xbar, S, S^2 What letter is used to denote the number of observations in a sample? - Answers n S^2 is the ___________________ variance. - Answers sample According to the text's notation, a residual is the difference between the __________ response and the model-predicted response. - Answers actual β0hat is the estimate of the ___________ in a simple linear regression model - Answers intercept ******** We want to do a hypothesis test on the difference between two population means and we do not know the population variances. We do a test of hypothesis on the equality of variances and determine that we have evidence that the variances, though unknown, are equal. How many degrees of freedom will our test statistic have? - Answers not n-1 ************** How many values can a Poisson random variable have? - Answers not 2 *******A completely randomized experiment has n _______________ for each treatment. - Answers not treatments The coefficient of determination is a measure of the __________ of variability that can be accounted for by the model. - Answers fraction Regarding hypothesis testing, alpha is the probability of Type I error. - Answers true ******* We want to do a hypothesis test on the difference between two population means and we are told the population standard deviation values for each population. Which test statistic do we use? - Answers not p0 The standard error of the sample mean is sigma/sqrt(n) - Answers true ******** The number of items in a population _______________. - Answers not is always finite An experiment that is repeated in the same manner every time but that can result in different ____________ is called a random experiment. - Answers outcomes If you were asked to sketch the pdf of a normal random variable, X, you would label the "y" axis as f(z) - Answers false ********** A rivet is to be inserted into a hole. A random sample of 15 parts is selected and the hole diameter is measured. The sample mean is 1.2 mm and the sample standard deviation is .008 millimeters. Is there strong evidence to indicate that the standard deviation of hole diameter exceeds 0.01 millimeters? What is the test statistic that will be used in the hypothesis test? - Answers not p0 What letter is used to denote the number of observations in a finite population? - Answers N If we wanted to make a histogram from a sample of 100 pieces of data, how many bins should we have according to the text and the Rule of Thumb? - Answers 10 alpha is - Answers the probability of Type I error Consider this experiment: analysts want to investigate the effect of drying temperature of wheat grain on baking quality bread. Three temperature levels were used, and the response variable measured was the volume of the loaf of bread produced. The data are as follows: The total number of loaves of bread used in this experiment is five. True or False? - Answers false A standard normal random variable is referred to as the letter ________. - Answers Z Consider this experiment: analysts want to investigate the effect of drying temperature of wheat grain on baking quality bread. Three temperature levels were used, and the response variable measured was the volume of the loaf of bread produced. The data are as follows: This is a randomized complete block experiment. True or False? - Answers false Given events E1 and E2: P(A N B) = P(A) + P(B) - P(A U B)