The probability distribution of the discrete random variable X is shown in the table below. x -3 -1 0 4 P(X=x) a b 0.15 0.4 Given that E(X)= 0.75, find the values of   a   and   b

Q: Example 2. Calculate the covariance of the following pairs of observations of the two variates X and...

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Q: Find the number of permutations of the letters j, k, l, m, n, o and p taken 4 at a time

A: The given letters are j, k, l, m, n, o and p. 4 letters are taken at a time.

Q: The probability distribution of the random variable X represents the number of hits a baseball playe...

A: Data set of the random variable X base on the simulation for 25 games:-  2,2,0,4,3,0,2,0,3,2,3,1,0,2...

Q: Assume that we want to construct a confidence interval. Do one of the​ following, as​ appropriate: (...

A:   Identify the type of test used to find the critical value to construct the confidence interval.   ...

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Q: The marks obtained by a group of students in a certain subject are assumed to be approximately norma...

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Q: Construction confidence intervals at the 95% levels for respondents who are Democrat/Lean Democrat a...

A: Hi! Thank you for the question as per the honor code, we’ll answer the first question since the exac...

Q: b) The Table below shows the average score of the150 students sampled from the University of the Eas...

A: We know that  Mean = sum of all observations/total number of observations  Median = middle value of ...

Q: A random sample of 175 individuals working in a large city indicated that 43 are dissatisfied with t...

A: We have given that  Sample size n =175 Favorable cases x =43 Sample proportion p^=x/n  =43/175 =0.24...

Q: A school has 820 male students and 835 female students. If a student is selected at random, what is ...

A: We have given that,  Male students = 820 Female students = 835 Total students = 820 + 835 = 1655  

Q: Ryan is throwing a football through a tire in his backyard. He has the probability of .30 of throwin...

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Q: A researcher wants to conduct an experiment to determine which environment is best suited for studyi...

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Q: cards are drawn from a standard deck of 5252 playing cards. How many different 44-card hands are pos...

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Q: 20 points) Ten honors students, each from a different high school in a county are lined up in two ro...

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Q: Suppose that X, Y, and Z are jointly distributed random variables, that is, they are defined on the ...

A: Given that,  E(X) =-9 , E(Y) =-5, E(Z) =-1 Var(X) =3, Var(Y) =1, Var(Z) =34

Q: Use the ALEKS calculator to solve the following problems. (a) Consider at distribution with 15 degre...

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Q: An auto manufacturing company wanted to investigate how the price of one of its car models depreciat...

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Q: the average height of grade 10 students is 148 cm. a sample of 250 students had an average heigh of ...

A: Given: μ=148Sample size, n=250sample mean, x¯=148.3sample sd, s=8  

Q: Cititon Forest contains a population of 182 chupacabra, whose masses have a mean of 45.0 kg and a st...

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Q: Two samples are taken with the following numbers of successes and sample sizes r1r 26 r2= 38 n1= 67 ...

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Q: One question from a survey was "How many credit cards do you currently have?" The results of the sur...

A: Given data, 3 2 2 3 3 5 1 3 5 1 2 5 3 3 8 3 5 2 3 4 3 ...

Q: Find the missing value u of X =  Find the missing probability p =  (fraction form) Compute the mea...

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Q: Suppose that a committee is studying whether or not there is waste of time in our judicial system. I...

A: (1) Identify the correct distribution for the given problem. The correct distribution for the given ...

Q: uppose that you are offered the following "deal." You roll a die. If you roll a six, you win $10. If...

A: It is given that if you roll a six, you win $10. If you roll a four, you win $5. If you roll a one, ...

Q: The life time of a printer head is assumed to follow normal distribution with mean 8 million charact...

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Q: Do male and female servers at Swank Bar work the same number of hours? A sample of 75 female servers...

A: We have given that  Sample sizes n1=75     , n2=75      Sample means X̄1=35      , X̄2=36        s1=...

Q: (c) Describe the sampling distribution of p, the proportion of people who are satisfied with the way...

A: From the given data fill the blanks given

Q: Example 1. Given that the coefficient of correlation between x and y is 0.6, write down the correlat...

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Q: Consider an MPT that is backed by 100 mortgages with average balance of $450,000 and monthly payment...

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Q: Gohan throws a fair tetrahedral die with faces numbered 1, 2, 3, 4. If she throws an even number the...

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Q: Select True or False from each pul-down menu, depending on whether the corresponding statement is tr...

A: Here, we know that sample means of normally distributed and sample mean of the all the samples will ...

Q: You are testing the claim that the proportion of men who own cats is smaller than the proportion of ...

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Q: If a card is drawn at random and we know that it is a two. What is the probability that it is a two ...

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Q: of the following is FALSE? (A) E(k³Y) = k³ E(Y) (B) E(1 – k) = 1 – k (C) E(5k Y + 3) = 5k E(Y) + 3 (...

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Q: As the p-value for a test is 0.676 , Which of the following is true? OWe will accept H0 at alpha = 0...

A: In a hypothesis testing there are at least two hypothesis which is claimed; null hypothesis and alte...

Q: 3. A sample includes 106 body temperatures with a mean of 98.20°F. Assume that o is known to be 0.62...

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Q: (d) Obtain a scatter plot of the 9 data points. (e) Find the value of the correlation coefficient fo...

A: yes there is possible effect of a single pair of values ,because single pair of values changing the ...

Q: A magazine conducts an annual survey in which readers rate their favorite cruise ship. All ships are...

A: Given data n1=38x1¯=85.62σ1=4.55And n2=44x2¯=81.10σ2=3.97  

Q: You wish to test the following claim (HaHa) at a significance level of α=0.02α=0.02.       Ho:p1=p2...

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Q: Suppose Z follows the standard normal distribution. Use the calculator provided, or this table, to d...

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Q: Which of the following interpretations is correct? a. We are 95% confident that xˉxˉ lies between...

A: We have given that, Sample size n = 1097 Sample mean = 3.16 Sample standard deviation = 1.91 The 95%...

Q: Do male and female servers at Swank Bar work the same number of hours? A sample of 75 female servers...

A: There are two independent samples which are female and male. We have to construct 96% confidence int...

Q: Find k such that the function is a probability density function over the given interval. Then write ...

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Q: Illustration 22.6. Following figures gives the mortality rate the life table (g,) at the ages 0, 1, ...

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Q: As part of the General Social Survey, 1097 randomly selected American females were asked, “What do y...

A: We have given that,  (1) Sample mean (x̄) = 3.16, sample standard deviation (s) = 1.91, sample size ...

Q: You are testing the claim that the proportion of men who own cats is significantly different than th...

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Q: The recovery room or the post anesthesia care area at St. Luke's Hospital in Maumee, Ohio, was recen...

A: We have given that  Population mean μ =25 Sample size n =15 Level of significance =alpha =0.01

Q: Last year over 12,000 students took an entrance exam at a certain state university. Felipe's score w...

A: a) The correct answer is "Option b".  

Q: The results of a calculus exam are normally distributed with a mean of 76 and a standard deviation o...

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Q: The classification was on the basis of three sections: Literature, Fiction and Illustrated News. The...

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