Mathematics, 21.10.2020 16:01 personm21
In Evans history class, 10 out of 100 key terms will be randomly selected to appear on the final exam; Evan must then choose 7 of those 10 to define. Since he knows the format of the exam in advance, Evan is trying to decide how many key terms he should study. (a) Suppose that Evan decides to study s key terms, where s is an integer between 0 and 100. Let X be the number of key terms appearing on the exam that he has studied. What is the distribution of X? Give the name and parameters, in terms of s. (b) Calculate the probability that Evan knows at least 7 of the 10 key terms that appear on the exam, assuming that he studies s = 75 key term
Answers: 1
, suppose Evans studied s key terms, this implies that he has not studied 100 - s key terms. Suppose 
if X = k, then k out of the s key terms he had studied appeared. But 10 - k out of 100 - s key terms he hasn't studied appeared. Thus X is an Hypergeometric distribution, X~HGeom(s, 100 - s, 10) with PMF:
Another question on Mathematics
Mathematics, 21.06.2019 12:30
Dilations map circles to circles and ellipses to ellipses with the same. true or false
Answers: 1
Mathematics, 21.06.2019 14:00
Ms. sutton recorded the word counts and scores of the top ten essays in a timed writing contest. the table shows her data. how does the word count of an essay relate to its score in the contest? word count tends to decrease as the score decreases. word count tends to increase as the score decreases. word count tends to remain constant as the score decreases. word count has no apparent relationship to the score of the essay.
Answers: 1
Mathematics, 21.06.2019 15:00
Five dinosaurs go for a walk and come across some lovely chicken wings. their names are rexy, bronto, steggy, paly, and terry. there are exactly 5 dozen wings(equal enough for each dino to have a dozen right? ); however, terry is on a diet and he only eats 6 wings. if paly eats 2 more than terry, steggy eats 4 more than paly, and bronto and rexy eat the same amount because they are really hungry from not eating all day, how many chicken wings did each dino eat?
Answers: 1
Mathematics, 21.06.2019 23:30
Which two fractions are equivalent to 6/11? 6/22 and 18/33 12/22 and 18/33 12/22 and 18/22 3/5 and 6/10
Answers: 1
You know the right answer?
In Evans history class, 10 out of 100 key terms will be randomly selected to appear on the final exa...
Questions
Mathematics, 29.06.2019 18:00
Mathematics, 29.06.2019 18:00
Mathematics, 29.06.2019 18:00
Mathematics, 29.06.2019 18:00
English, 29.06.2019 18:00
Social Studies, 29.06.2019 18:00
History, 29.06.2019 18:00
Mathematics, 29.06.2019 18:00
Mathematics, 29.06.2019 18:00
English, 29.06.2019 18:00
