T or F and explanation We expect the observed value of X to be within three...
If the random variable x is normally distributed, ______ percent of all possible observed values of x will be within three standard deviations of the mean 68.26 95.44 99.73 99
Consider these two boundary-value problems: Show that if x is a solution of boundary-value problem,... clear steps and brief explanation please 7. Consider these two boundary-value problems: . x-f (t, x, x') x(a)ax(b) B Show that if x is a solution of boundary-value problem ii, then the function y(t) - x((t- a)/h) solves boundary-value problem i, where h b- a. 7. Consider these two boundary-value problems: . x-f (t, x, x') x(a)ax(b) B Show that if x is a solution...
3) Assume we expect a process to follow the equation y(t) = ct + dyt and we have the measurements: t y(t) 1.0 0.30 2.0 0.21 3.0 0.14 4.0 0.12 5.0 0.11 6.0 0.09 a) Determine a least squares estimate of the parameters c and d. b) Using your least squares estimates of the parameters, estimate the value of y(2.5).
1. True or False: (1pt each) (T) (F) If a distribution is normal, then it is not possible to randomly select a value that is more than 4 standard deviations from the mean. (T) (F) Normal distribution is a discreet probability distribution for a random variable. (T) (F) If the variable follows a binomial distribution, then about 68 % of the variables are within 1 SD of the mean, about 95% of the variables are within +2 SD of the...
According to a random sample taken at 12 AM, body temperatures of healthy adults have a bell-shaped distribution with a mean of 98 17°F and a standard deviation of 0.61°F. Using Chebyshev's theorem, what do we know about the percentage of healthy adults with body temperatures that are within 2 standard deviations of the mean? What are the minimum and maximum possible body temperatures that are within 2 standard deviations of the mean? At least % of healthy adults have body...
The joint probability density function is f(x, y) for 17. Find the mean of X given Y = random variables X and Y fax, y) = f(xy *** Q<x<10<x<1 Elsewhere w 14. Random variables X and Y have a density function f(x, y). Find the indicated expected value f(x, y) = 6; (xy+y4) 0<x< 1,0<y<1 0 Elsewhere E(x2y) = 15. The means, standard deviations, and covariance for random variables X, Y, and Z are given below. Lex= 3, uy =...
14. Random variables X and Y have a density function f(x, y). Find the indicated expected value. f(x, y) = (xy + y2) 0<x< 1,0 <y<1 0 Elsewhere {$(wyty E(x2y) = 15. The means, standard deviations, and covariance for random variables X, Y. and Z are given below. LIX = 3. HY = 5. Az = 7 Ox= 1, = 3, oz = 4 cov(X,Y) = 1, cov (X, Z) = 3, and cov (Y,Z) = -3 T = X-2...
From our last lesson about z-score, we know that z-score corresponds to different proportions in a normal distribution. It might be handy to remember that: 1) 68.26% of all observed data values will fall within ONE standard deviation from the mean (that is to the left and to the right). 2) 95.44% of all observed data values will fall within TWO standard deviations from the the mean (again, that is to the left and to the right). 3) 99.74% of...
what happens if the new x value (or value we try to predict) is not within the range or lies too far from the data thatvwas used to build the regression model
2. (24 pts) True/False. Circle T or F. No explanation needed. (a) T F If Ris the relation whose digraph is below, then Ris reflexive. (b) T F For the relation from part (a), R is symmetric (C) T F The relation Son {a,B,y,g} whose matrix is 100.1 - 0 1 0 0 0 0 1 0 1001 is an equivalence relation. (d) T F The relation S from part (C) is a partial order. (e) T F Let the...