Explain the importance of random sampling in real life situation. How can we apply it?

Q: Find the indicated z-score shown in the graph to the right. Area = 0.0436 2=? > The z-score is (Roun...

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Q: A study was done to compare the amount of time per day students at public and private universities s...

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Q: Determine the area under the standard normal curve that lies to the left of (a) Z = 0.69, (b) Z = 1....

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Q: 1. (a) Suppose we have the simple linear model Yi = Bo + B1x; + ei, i = 1, ...,n, E[e;] = 0, var(e;)...

A: " Since you have posted a question with multiple sub-parts, we will solve the first three subparts f...

Q: The accompanying table describes the random variable x, the numbers of adults in groups of five who ...

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Q: (c) Show all steps to construct a 99% confidence interval estimate of the proportion of all human re...

A: “Since you have posted a question with multiple sub-parts, we will solve first three subparts for yo...

Q: Suppose that x has a beta distribution with parameters a = 2.8 and B = 1. Determine to 4 decimal pla...

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Q: Jhustine receives 84 or 85 as his grade on his four major subjects. Construct the sampling distribut...

A: Given that  Three major subjects have 84 or 85  We have to construct the sampling distribution of me...

Q: (a) What proportion of rods has a length less than 29.9 cm? (Round to four decimal places as needed....

A: Since you have posted a question with multiple sub-parts, we will solve first three subparts for you...

Q: The results of an investigation by an expert on a fire accident are summarised below: (i) The probab...

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Q: It has been observed that the average number of traffic accidents requiring medical assistance on th...

A: A random variable is a variable whose values depend on outcomes of a random experiment. It is identi...

Q: Ex. A large number of insects are expected to be attracted to a certain variety of rose plant. A com...

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Q: CONSTRUCTION OF FDT: Mr. Yoo was asked to present the performance of his class in the prelim exam. T...

A: Given : Class Interval = 7 Data : 34 42 20 50 17 9 34 43 50 18 35 43 50 23 23 35 37 38 38 39 ...

Q: Find the minimum sample size you should use to assure that your estimate of p will be within the req...

A: Given

Q: How many symbols of 3 different orders greater than 3 700 can be formed from the set of numbers { 1,...

A: Combination : A combination could be a mathematical technique for scheming the amount of potential a...

Q: Two independent variables x and y have means 5 and 10 and variances 4 and 9 respectively. Find the c...

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Q: Questions: 1. Let Y be a normally distributed random variable with mean u = 0 and standard deviation...

A: Given that, Let Y be a normally distributed random variable with mean μ = 0 and standard deviation o...

Q: The accompanying table describes results from groups of 8 births from 8 different sets of parents. T...

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Q: Example Calculate standard deviation of the following data : : 10 11 12 13 14 15 16 17 18 f : 2 7 10...

A:       x Frequency (f) f⋅x f⋅x2 10 2 20 200 11 7 77 847 12 10 120 1440 13 12 156 2028 14...

Q: You wish to test the following claim (HaHa) at a significance level of α=0.002α=0.002.       Ho:μ=6...

A: Givensignificance level(α)=0.002The null and alternative hypothesis isH0:μ=60.6Ha:μ≠60.6sample size(...

Q: Suppose that 69% of people own dogs. If you pick two people at random, what is the probability that ...

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Q: a) What is the probability that an executive speaks a foreign language? [Hint: use the joint probabi...

A: Given: 46% of executives travelled internationally or can speak foreign language. Probability that t...

Q: (9) There are 300 questions on a multiple choice exam. For each question there are 5 choices to choo...

A: Given sample size(n)=300Each question has 5 choices and there is only one correct answerp=15=0.2x~Bi...

Q: A simple random sample of size n=300individuals who are currently employed is asked if they work at ...

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Q: /1FAlpQLSfQHVj30w949wli8P2K1fyhYnTi2je-Eokh7vHdrCar80_1KA/formResponse Question* Let X and Y be two ...

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Q: The population mean and standard deviation are given below. Find the required probability and determ...

A: Let X be the random variable from normal distribution with mean (μ) =  23, standard deviation (σ) = ...

Q: Business Weekly conducted a survey of graduates from 30 top MBA programs. On the basis of the survey...

A: Let X be the random variable from normal distribution with mean (μ) =177000 dollars, standard deviat...

Q: Academic Testing Professor Frank Nabarro insists that all senior physics majors take his notorious p...

A: Given below in handwritten 

Q: What two types of analyses (displayed in Table 2) were conducted by Dal'Ava et al. (2014) to examine...

A: Details given are  the table of statistic for matched samples of groups of DMPA  and TCu 380A IUD.

Q: You want to test the best way to maximize the fuel efficiency of Mercedes 30OD cars. You tinker with...

A: In the given case we have a sample of a total of 40 cars, 20 are the 1987 model and 20 are the 1985 ...

Q: Draw a normal curve with u = 61 and o = 20. Label the mean and the inflection points. ... Choose the...

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Q: Use the confidence level and sample data to find a confidence interval for estimating the population...

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Q: The time college students spend on the Internet follows a Normal distribution. At Johnson University...

A: Given,mean(μ)=5standard deviation(σ)=1.2sample size(n)=100

Q: Find the value of zg. a = 0.22 ... The value of zo.22 is . (Round to two decimal places as needed.)

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Q: 2. Suppose that Y1~ exp(1) and Y2~exp(1). and Y1 + Y2. Y1+Y2 a. Determine the joint density of U and...

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Q: Please answer a-h

A: “Since you have posted a question with multiple sub-parts, we will solve first three subparts for yo...

Q: described by the following Venn diagram A C O a. A - (B - C) O b. A - C O c (A - B) -C Od (A - c) - ...

A: We want to tell you which one is the correct choice.

Q: To test the intelligence of 10th class boys and girls in a Higher Secondary School, a sample of 83 t...

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Q: Student 1 3 4 6. 8. 9. 10 Marks: 43 48 65 57 31 60 37 48 78 59 2.

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Q: A prize of $100, $200, $400, or $800 will be randomly awarded to a game show contestant, with the pr...

A: We have given that,  Let X be the random variable having probability mass function is,  Prize (X)...

Q: In a recent Super Bowl, a TV network predicted that 52 % of the audience would express an interest i...

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Q: a) The prime Minister of a small Caribbean Island stated that 95% of the population was vaccinated f...

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Q: give the correct answer. compute the median value. a. 45.43 b. 47.90 c. 44.50 d. 46.52

A: Given data is Classes Frequency 31 37 6 ? ? 10 45 51 15 ? ? 3 59 65 1 ? ? 0 73 79 1...

Q: Frequency Distribution Table Example: Mr. Marcelo was asked to present the performance of his Busine...

A: Solution-: We make a frequency distribution table of given test score  (data) of Mr. Marcelo busines...

Q: Scores on a Test Class Frequency 30-37 4. 38-45 14 46-53 14 54-61 62-69 10 Step 2 of 5: Determine th...

A: Given that :  A frequency table is given and by using the class value we calculate class boundaries....

Q: The average daily volume of a computer stock in 2011 was μ=35.1million​ shares, according to a relia...

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Q: 1. Which portfolio do you think had the highest degree of diversification over the sample period? Ex...

A: Solution: Answer to Part (1): It is seen from the information given in the question: That the regres...

Q: aper. 1 What are the characteristics of a t-distribution? (Give at least 3 characteristics).

A: t-distribution: It is defined as the deviation of sample mean from its population mean expressed in ...

Q: 1. If X~ B(15,0.45) find, A) P(X = 7) Multilevel List B) P(5 9)

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Q: In a factory, two machines are serving 10 parts per hour. Parts arrive at the rate of 12 per hour wh...

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