An instructor has given a short quiz consisting of two parts. For a randomly selected student, let X = the number of points earned on the first part and Y = the number of points earned on the second part. Suppose that the joint pmf of X and Y is given in theaccompanying table.yР(х, у) | о510150.030.06 0.02 0.100.04 0.13 0.20 0.10100.01 0.15 0.15 0.01(a) If the score recorded in the grade book is the total number of points earned on the two parts, what is the expected recorded score E(X + Y)? (Enter your answer to one decimal place.)(b) If the maximum of the two scores is recorded, what is the expected recorded score? (Enter your answer to two decimal places.)

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Answered: instructor has given a short quiz…

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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T=5, T, = 10, T3 =15, with SS1 = 6, SS2=9, SS3 = 9, and EX² = 94. For this study, what is SSwithin?
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%£0 |, lu. , O smid (17).jpg 17 (2 Points) If P(A) = 0.7, P(B) = 0.5 and P((A U B)^) = 0.1, then P(A|B) = O 0.7 O 0.5 O 0.3 O 0.9 O 0.6
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5. Given P(A and B) = 0.08, P(B) = 0.85, P(B|A) = 0.54, what is P(A)
Q1. A psychologist conducted a study on the relationship between introversion and shyness. The values are results for scales of introversion and shyness. High positive scores on each scale indicate high introversion or shyness; and high negative scores indicate low introversion or shyness. Data collected from 10 people as follows: Introversion 4 -7 -1 0 6 7 -4 -9 -5 8 Shyness 11 -7 -1 -3 0 7 -1 -8 -1 5 a) Compute the correlation coefficient relating introversion and shyness scores. b) Find the regression equation which predicts introversion from shyness. c) What introversion score would you predict from a shyness score of 7?
D= SD= In general why does ud represent ?
Q 10. D c (careful!). ifferentiate lIn
Which combination would lead you to Reject H₂? a = .05 p-value = .045 a = .01 p-value = .059 O a = .05 p-value = .059 O a = .01 p-value = .045
uhv o oc 22.9. Show that if A occurs in a larger proportion of cases where B is than where B is not, then B will occur in a larger proportion of cases where A is than where A is not. CADY
EDFN 1090/1092 Assignment #5 1. Would you expect a positive, negative, or zero correlative between each of the following pairs of variables? a. Heights of mothers and daughters b. Age and reaction time in the adult population c. Natural gas usage and prevailing (outside) temperature d. Reading skill and shoe size in the population of individuals over 18 2. A researcher hypothesized that there is a relationship between self-esteem and social responsibility, which increases with age. The researcher gave self-esteem and social responsibility inventories to two sets of people: a group of 10 high school students and 10 adults. The data collected are given below (SE = self- esteem; SR = social responsibility). High School Students SE. 10 12 13 PASH6809 11 5 14 10 SR 21 20 16 18 112128 19 17 19 10 13 20 HARDHSCDHSH SE 13 15 12 14 8 6 12 11 9 14 Adults HENNARSDDKSG 23 24 21 20 18 12 19 18 15 20 years old a. Calculate the correlation for adults given the values below. (Let X = SE, Y = SR) Σ ΧΥ…

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