A multiple choice exam has 10 questions with 5 answer choices for each question. Only one choice is correct for each question. A student makes random guesses on all 10 questions. Find the probability that he will answer 4 questions correctly.

Q: List the sample space for each of the following event. 6. Getting a head and 3 in rolling a die and…

A: GivenA die is rolled a die and tossed a cointhen the possible outcomes…

Q: A bag of 12 marbles contains 4 marbles with red on them, 3 with blue on them, 6 with green on them,…

A: Solution

Q: Students will be chosen at random for school spirit awards. There are 6 athletes and 8 non-athletes…

A: GivenNo.of athletes = 6No.of Non athletes = 8Total of students = 6+8=14No.of prizes = 2

Q: A random sample of 45 salespersons were asked how long, on average, they were able to talk to a…

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Q: What is the probability that a single die shows a 1 or a 6 in a single roll? Show your complete…

A: The possible outcomes when rolling a die is {1,2,3,4,5,6}.

Q: In how manyways can 7 honorable people be seated in a round table?

A: Hello! As you have posted 2 different questions, we are answering the first question. In case you…

Q: The waiting time at a grocery checkout has an exponential distribution with mean of 9 minutes. What…

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Q: A coin is tossed three times. An outcome is represented by a string of the sort HTT (meaning a head…

A: Introduction: It is required to find the probabilities of the events A, B, and C.

Q: What is the expected value of this game to you? Should you expect to win (or lose) an amount equal…

A: Here Given for the game of rolling two fair dice And  It is given that Odds against two Even Numbers…

Q: 5. The day after, their class decided to pick a president. Despite telling the class they did not…

A: Given  Su-hyeok is A Cheong-san is B Nam-ra is C Onjo is D and  Probability of A Winning =…

Q: Soalan/ Question 3 The weight of a certain population of young heifers is approximately normally…

A: Given that

Q: A game has 49 green balls and 1 red ball in a bag, and you will randomly select one ball from the…

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Q: Probability

A: Solution

Q: According to a report done by S&J Power, the mean lifetime of the light bulbs it manufactures is 45…

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Q: According to a report done by S&J Power, the mean lifetime of the light bulbs it manufactures is 45…

A:

Q: 1. Complete the table Po P- n value a. 100 40/100 8% b. 248 51/248 10% C. 312 100/31 12% 2 d. 486…

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Q: What is the probability that a single die shows 1 or a 6 in a single roll? Show your complete…

A: Given: A single die is thrown To find: The probability of getting 1 or a 6 in a single roll.

Q: Please reply as soon as posible, and please answer all 4 points If 20% of the bolts produced on a…

A: Given,n=4p=0.2q=1-0.2=0.8A random variable X~Binomial(n=4 , p=0.2)P(X=x)=4x0.2x0.84-x   ;…

Q: Let X ~ Poisson(a). Show that E[X(X-1) (X-2)… (X-k)]= ak+1 ...

A: Chance of occurrence of an event in short time interval is very small. The number of occurrences of…

Q: Suppose that the life distribution of an item has the hazard rate function 1(t) = t³,t > 0. What is…

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Q: (a) Calculate the sampling error at 95% confidence level   (b) Construct a 95% confidence interval…

A: Given that  Sample size n =25 Sample mean =53 Population standard deviation =5.5 NOTE:- According to…

Q: (a) Consider a t distribution with 24 degrees of freedom. Compute P(-1.00<1<1.00). Round your answer…

A: Form the given data Find (a ) P(-1.00 &lt; t &lt;1.00 ) =? ( b ) c =?

Q: Two cards are selected in sequence from a (a) .1 standard deck. Find the probability that.. the…

A: HERE for standard deck of cards  total cards  = 52  no of suit  = 4 each suits contains 13 cards

Q: 6.30. Jill's bowling scores are approximately normally distributed with mean 170 and standard…

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Q: Q2: Let X and Y have a bivariate normal distribution with parameters 4, H2 = 1, of = 16,0 = 25 and…

A: Solution

Q: A psychic calls everyone an a list of 275 sports bettors with tips about who will win the…

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Q: Q3: Let i be the observed mean of a random sample of size n from a distribution having mean u and…

A: Hello! As you have posted 2 different questions, we are answering the first question. In case you…

Q: A store gathers some demographic information from their customers. The following chart summarizes…

A: From the provided information, Age Number of Customers &lt; 20 80 20 – 29 79…

Q: Problem 4. Which of the following pairs of sets are equal? Justify your answer. (1) A = {x : x is a…

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Q: roblem No. 1: Suppose that Y1, Ya, Y3 denote a random sample from an exponential distribution with…

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Q: (a) the constant b in terms of a. (b) P(X>a). (c) P(a < X < 3a). (d) X, X2 and o² .

A: As per bartleby guidelines we can solve only first three subparts and rest can be reposted.

Q: The probabliity density function for the random variable X is given by x2. f(x) = {(25 - x2), 0, 0<x…

A: Given that ; Here a probability density function is given.  By using the concept of cumulative…

Q: (a) f(x)= 5. For each of the following, determine the constant k so that f (x) satisfies the…

A: We have given that the random variable X having pdf in discrete form. Here, need to find out the…

Q: The population proportion for a certain characteristic is 0.28. In a sample of 100 people, 25 had…

A: From the provided information, Population proportion (p) = 0.28 Sample size (n) = 100 From which 25…

Q: 1. Determine the permutations of the following. a. CELLULAR b. FLAMMABLE Ç. AVAILABLE

A: HERE AS PER GUIDELINES I HAVE CALCULATED 3 SUBPARTS  here use basic of permutation   Prn =  n!(n-r)!

Q: According to a report done by SAJ Power, the mean lifetime of the light bulbs it manufactures is 45…

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Q: Fit a normal distribution for the following data by using ordinates method. Class-interval 150-160…

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Q: Two cards are selected in sequence from a (a) .1 standard deck. Find the probability that.. the…

A: here given there are total 52 cards in standard deck  there 4 suits in deck of cards  each suits…

Q: Consider the pdf shown. Determine (a) the constant b in terms of a. (b) P(X>a). (c) P(a <X < 3a).…

A: As per bartleby guidelines we can solve only first three subparts and rest can be reposted

Q: The cost of living index number rose during 1998 by one quarter of what it was during 1997 to 225.…

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Q: According to a report done by S&J Power, the mean lifetime of the light bulbs it manufactures is 45…

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Q: Explain the following weighted index numbers. (a) Laspeyre's Price Index Number (h) Passche's Pricg…

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Q: 10.6% of the population is 65 or older. Find the probability that the following number of persons…

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Q: 1. A company is manufacturing blue jeans at a cost of $9.99 per pair. They plan to put a price tag…

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Q: ng to a report done by 5 & J Power, the mean lifetime of the light bulbs it manufactures is 45…

A:

Q: Q1. Age and pulse rate on a study of 6 people is as follows. Age 1 5 Pulse 130 10 15 20 25 110 100…

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Q: Directions: Formulate the null and alternative hypothesis, identify the level of significance,…

A: Hypotheses are H0: P=0.50 H1: P≠ 0.50   The level of significance is 1-0.99 =0.01 CLT is suitable…

Q: Suppose that the life expectancy of a certain brand of nondefective light bulbs is normally…

A: Given data,Mean μ=1200sd    σ=50If n=30000P(1130&lt;X&lt;1260)=?

Q: An amount of $10,000 is to be invested for three years. The yield rate for the first year will be…

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Q: If (a,b) denotes an arbitrary interval of numbers on the real number line, Find the probability when…

A: if [a,b] denotes an arbitrary interval of numberson the real number line.