In a class of 50 students, the number of students n; of each age i is shown in the following table: Age i ni 18 19 20 22 4 3 21 25 If a student is to be selected at random from the class, what is the expected value of his age?

Q: 17. After manufacture, computer disks are tested for errors. Let X be the number of errors detected ...

A: From the given information, Let X be the number of errors detected on a randomly chosen disk. The fo...

Q: The amount of time between taking a pain reliever and getting relief is normally distributed with a ...

A:

Q: A student will spend 15 hours average each week in class. If the standard deviation is 2 hours, what...

A: Given that mean=15 and standard deviation = 2 Let, X= number of hours spent by a student in the clas...

Q: As a design engineer, you were given the datasheets of 2 power amplifiers. After checking the datash...

A:  

Q: You may need to use the appropriate appendix table or technology to answer this question. The follow...

A: From the given information, the first sample size is 60 observations; sample mean is 13.6, populatio...

Q: A card is drawn at random from a set of cards containing two decks. What is the probability that the...

A: Solution: A deck contains 52 cards. It has 4 suits. Each suit contains 13 cards. There are 26 red ca...

Q: A single die is rolled 4 times. Find the probabilities that the number of 6's that appear is as stat...

A: Obtain the probability that the number of 6's that appear as four. The probability that the number o...

Q: A group of children visited a zoo during a pre-school celebration week. A sampling of children was a...

A: Total 165 children prefer Lion.  Among those 165 children, 90 are boys.    

Q: 9. A study of the post treatment behavior of a large number of drug abusers suggests that the likeli...

A: Since we only answer up to 3 sub-parts, we’ll answer the first 3. Please resubmit the question and s...

Q: Problem 4 (counts as two problems): Let X1, X2, .., X,be a collection of independent discrete random...

A:

Q: Use the formula for the probability of the complement of an event.Two dice are tossed. What is the p...

A: To find the probability of not getting a sum of 9, we will subtract the probability of getting a sum...

Q: Determine whether the statement is parts a) and b) are true or false. Explain your answer in words, ...

A:

Q: An amount of P dollars is borrowed for the given length of time with the amount F due at the end of ...

A: Final amount = $5596 , initial amount = $4000 So interest = $(5596-4000)=$1596   

Q: 7. A 6-sided die is rolled. The set of equally likely outcomes is {1, 2, 3, 4, 5, 6}. Find the proba...

A: In the set of outcomes, there are 6 possible outcomes.    We want to roll a number less than 4 then ...

Q: Four cards labeled A, B, C, and D are randomly placed in four boxes labeled A, B, C, and D. A card i...

A: Given Information- We have given 4 cards labeled A, B, C and D are placed in 4 boxes labeled A, B, C...

Q: A single card is drawn from a standard deck. Find the probability of the following event. (Enter you...

A: Solution: There are 4 suits in the standard 52 card deck. Each suit has 13 cards. Face cards are jac...

Q: A bag contains four red marbles, two green ones, one lavender one, three yellows, and three orange m...

A: There are total  4 red marbles. And (2+1+3+3)=9 non-red marbles.     At least three red ones mean 3 ...

Q: yATTU, COnatTonal In a large population, 64 % of the people have been vaccinated. If 3 people are ra...

A:

Q: question.Age (Years) Less than high school High school graduate Some college College Degreegraduate1...

A:

Q: The accompanying tree diagram represents an experiment consisting of two trials. A EC .4 .7 E° .2 .6...

A: From the diagram P(E|A)= 0.5 answer(b): 0.5    

Q: Twelve people are on a committee, seven women and five men.  If a four-person subcommittee is to be ...

A: Since we are going to form a committee so here order does not matter. So we will use combination. We...

Q: 68) A jury pool consists of 27 people, 14 men and 13 women. Compute the probability that a randomly ...

A: A jury is a group of people, here order does not matter.  We can pick a group of 12 from 27 people i...

Q: An insurance company sells a $2,000, eight-year term life insurance policy to an individual for $220...

A: Given that the individual will live for the next eight years is 0.99. So, the probability that the c...

Q: Question 16

A: In a standard deck of cards, there are total 52 cards. Among those 52 cards, 4 cards are queen.  So ...

Q: Threeinspectorslookatacriticalcomponentofaproduct.Theirprobabilitiesofdetecting a defect are differe...

A: a) Probabilities that they will not detect a defect are: (1-0.99), (1-0.98), (1-0.96)= 0.01 , 0.02 ,...

Q: A card is selected at random from a standard deck of playing cards.Compute the probability that the ...

A:

Q: 17. Prison Education In a federal prison, inmates can select to complete high school, take college c...

A: There are total (53+107+450+27+32+367)= 1036 prisoners in the prison. (450+367)=817 prisoners do not...

Q: Problem 4 (counts as two problems): Let X1, X2, ., X„be a collection of independent discrete random ...

A: Bernoulli distribution: A random variable is said to have a Bernoulli distribution with parameter p ...

Q: Richard has just been given a 10 question multiple-choice quiz in his history class. Each question h...

A: The random variable X is number of correct answers. The probability of correct answer is 1/5 = 0.20 ...

Q: The number of power outages at a nuclear power plant has a Poisson distribution with a mean of 6 out...

A:

Q: The mean weight of a box of cereal filled by a machine is 17.0 ounces, with a standard deviation of ...

A: From the provided information, Mean weight of a box of cereal filled by a machine (µ) = 17.0 ounces ...

Q: What is the probability of each of the following events: • What is the probability that a card chose...

A: Since we only answer up to 3 sub-parts, we’ll answer the first 3. Please resubmit the question and s...

Q: Giving a test to a group of students, the grades and gender are summarized below Total Male 10 15 27...

A: There are total 27 males.  Among those 27 males 10 males got A.  

Q: 8. There are 14 standbys who hope to get a seat on a flight, but only six seats are available on the...

A: Six seats are different so here the order of arrangement will matter. So we are going to use permuta...

Q: Five cards are drawn from a standard deck of playing cards and not returned to the deck as they are ...

A: A standard deck of cards contains 52 cards We can pick the first card in 52 ways When the first card...

Q: In a lab experiment, you test for the presence of two viruses, X and Y , in a culture. After conduct...

A: From the given information, Consider, P (XC) =0.35 P (y) = 0.70 P (XUY) =0.88, P (X and Y) =? Thus, ...

Q: Find the apportionment of the Bandana Republic as described in exercise 1 (M=160) under Hamilton's m...

A: Total population of Bandana republic is (3,310,000+2,670,000+1,330,000+690,000)=8,000,000 So, The p...

Q: Assume that 2 cards are drawn from a standard 52-card deck. Find the following probabilities. (a) Th...

A: There are total of 13 spades and 13 hearts in a standard deck of cards.   a) Without replacement:  W...

Q: v Question Completion Status A Moving to another question will save this response, Question 3 A sing...

A: If a single coin is tossed then the possible outcomes are head and tail. So total 2 outcomes. Favora...

Q: A state legislator wishes to survey residents of her district to see what proportion of the electora...

A: The sample size is 67

Q: Rochester, New York, averages μ = 21.9 inches of snow for the month of December. The distribution of...

A: Let X= amount of snowfall in the month of December. Given that X follows normal distribution with me...

Q: A sales manager collected the following data on x = years of experience and y = annual sales ($1,000...

A: Use EXCEL to obtain the values of SST, SSR and SSE. EXCEL procedure: Go to EXCEL Go to Data>Data...

Q: What is the probability that a card chosen from an ordinary deck of 52 cards belongs to a red suit? ...

A: “Since you have asked multiple question, we will solve the first question for you. If youwant any sp...

Q: Sales A manufacturer makes two models of an item:model I, which accounts for 80% of unit sales, andm...

A: Let us denote A= event of picking model I, B= event of picking model II D= event of picking defectiv...

Q: 3. If you draw 5 cards from a deck of 52 at random, what is the probability of getting 5 different d...

A:   Hey, since there are multiple questions posted, we will answer first question. If you want any spe...

Q: A card is selected at random from a standard deck of playing cards. Determine the number of elements...

A: Probability is defined as the measure of the likeliness that any random event will happen. It is qua...

Q: The table summarizes results from 988 pedestrian deaths that were caused by automobile accidents. Dr...

A: Total (231+611)= 842 cases involved drivers that were not intoxicated.  We can pick two cases from t...

Q: The following table shows the results of a survey of authors by a (fictitious) publishing company. H...

A: Given: S: an author is successful U: an author is unsuccessful N: an author is new E: an author is e...

Q: Convert to base 10 54325

A: The position value of units place of base 5 is = 50=1 The position value of the tenths place of base...

Q: A group of 15 undergraduate and 15 graduate students are in a room. If 10 of the 30 students are sel...

A:

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.