Example In a large group of students 80% have a recommended statistics book. Three students are selected at random. Find the probability distribution of the number of students having the book. Also compute the mean and variance of the distribution.

Q: A. If X~N(196,20), find x such that Pr(X < x) = 0.945.

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Q: Which of the following most describes a coorelation of 0.83 between heght and weight?

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Q: 1. P(-2 3) 3. P(z < -2)

A: As per our guidelines we are supposed to answer only 3 sub-parts of any question so I am solving fir...

Q: 4. Which of the following answers best describes the table Quality 1: QUALITY 1 SUPPLIER DEFECT А В ...

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Q: 1. If a Gaussian process is wide-sense stationary, it is also strict-sense stationary.

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Q: 101, x=43, and s 15, construct a confidence If n interval at a 80% confidence level. Give your answe...

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Q: Samples of four different chocolate chip cookies show the following numbers of calories for the sugg...

A: The Kruskal – Wallis test is used to check the significant difference between averages of more than ...

Q: The mean and S.D of a set of 100 observations were worked out as 40 and 5 respectively. But by mista...

A: Given: Previous  mean =40 Previous sd=5 Number of observation, n=100

Q: (a) The results of a bivariate analysis are given in the following form: Ex = 30, Ey = 60, Er² = 190...

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Q: the p-value and correlation are one of the most commonly used statistical tests for determining the ...

A: The purpose of plotting scientific data is to visualize variation or show relationships between vari...

Q: A magazine includes a report on the energy costs per year for 32-inch liquid crystal display (LCD) t...

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Q: What can be concluded at the the a = 0.10 level of significance level of significance? a. For this s...

A: given data : 15,11,11,13,11,13,15,13,11,11,15

Q: If the age distributions of two populations are very similar, the age-adjusted all-cause mortality r...

A: Introduction: It is required to determine if the given statement is true or false.

Q: The variable x takes only two values x, and x, with frequencies fj and f. If s be the S.D. of x, sho...

A: Solution is given:

Q: In each of a set of games, it is 2 to 1 in favour of the winner of the previous game ; what is the c...

A: Given that, In each of a set of games, it is 2 to 1 in favour of the winner of the previous game. We...

Q: For the data given below find the missing frequency if the arithmetic Mean is $ 33. Also find the me...

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Q: State whether the following statements are true or false :

A: Here use some basic of measure 

Q: Define analysis of variance (ANOVA)

A: ANOVA : It is a statistical method  

Q: You are forming a team of 4 from a set of 7  players. The order of the players in the team does not ...

A: Here, we have given that two different problems.   Note: According to Bartleby expert guidelines, we...

Q: How do you determine whether a regression model is showing a case of redundancy?

A: Multicollinearity is simply redundancy in the information contained in predictor variables. If the r...

Q: normal pdf.

A: For a normal distribution with parameters μ &amp;σ the pdf is given by:

Q: In a certain town every telephone number consists of four digits, the first of which cannot be zero....

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Q: Given the joint distribution of X and Y   X\Y        0            1            2            3      ...

A: Here is joint probability distribution is given, we will find mean of marginal distribution of y.

Q: You wish to test the following claim (HA) at a significance level of a = 0.002. H.:µ = 76.5 Ha: µ > ...

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Q: Intensive care units (ICUs) generally treat the sickest patients in a hospital. ICUs are often the m...

A: Given that mu =3.4 a. What is the probability that the length of stay in the ICU is one day or less ...

Q: If θ̂ is a point estimator of θ, prove that MSE(θ̂) = V(θ̂) + (B(θ̂))2

A: We have given that θ̂ is a point estimator of θ. We know that  MSE(θ̂) = E((θ̂ - θ)2 )

Q: The random variables with the same mean the two regression equations are y= ax +b and x= ay + B, b 1...

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Q: level of significance (i.e., type I error rate) 0.1 such that each tail of the rejection region has ...

A: Here given row data for sample statistics  Using given data calculate sample statistics and perform ...

Q: Computing SST, SSE and

A: Hello! As you have posted more than 3 sub parts, we are answering the first 3 sub-parts.  In case yo...

Q: ? lim (8x + 3) (x - 3) Evaluate x → ∞

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Q: 2. If the member functions of a Gaussian process are uncorrelated, then they are independent.

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Q: Use the COUNTIF function to construct frequency distributions for​ gender, preferred​ style, and pur...

A: A frequency distribution is a graphical or tabular presentation of data that shows the number of occ...

Q: A psychologist is interested in the mean IQ score of a given group of children. It is known that the...

A: The random variable IQ score follows normal distribution. We have to construct 95% confidence interv...

Q: The population and deaths of two towns according to age groups are giyen below: Town A Town B Age gr...

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Q: a) None is left-hander b) Exactly one is left-hander c) Among 100 groups of ten girls, how many grou...

A: Here use binomial distribution because  Each trial is independent  Finite number of trial  There ar...

Q: In 1974, the mean weight for men in the United States aged 18-74 was 172 pounds, with a standard dev...

A: Given that mean =172.sigma =31.1 What is the probability that any man chosen from the sample weighs ...

Q: Q3. Suppose an insurance company oers a standard insurance contract to all customers with a premium ...

A: In the usual actuarial notations, the parameters for any contract are r and q let 'r' denotes the pr...

Q: The average time to run the 5K fun run is 20 minutes and the standard deviation is 2.3 minutes. 42 r...

A: As per our guidelines we are supposed to answer only 3 sub-parts of any question so I am solving fir...

Q: The decision rule when using P-value method for hypothesis testing is O reject HO if test value s cr...

A: In question, We'll choose the correct option of p-value method for hypothesis testing. The solution ...

Q: The accountant at Bintong Chen Coal Distributors, Inc., in Newark, Delaware, notes that the demand f...

A: For the given data find Regression equation is = ? Correlation ( r ) =? Standard error of estimate ...

Q: 1. For the events A and B, P(A) = 0.6, P(B) = 0.8 and P(A U B) = 1. a) Find P(A NB) b) Find P(A' U B...

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

Q: State whether the following statements are true or false : (i) For any data, larger the mean larger ...

A:   i) It is not necessary that larger the mean larger is standard deviation. Thus, given statement is...

Q: The following data are from an experiment designed to investigate the perception of corporate ethica...

A: Given, Marketing managers Marketing research Advertising 6 5 6 5 5 7 4 4 6 5 4 5 6 5 6

Q: The operations manager of a musical instrument distributor feels that demand for a particular type o...

A:   By using linear regression, a)  sample mean (x̄) = Σx/n  = 330/6 = 55 sample mean (ȳ) = Σy/n = 69...

Q: Output 1 NOVA ource of Variation p-value 8.304985 0.001474 3.238867 af MS F F crit etween Groups 212...

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Q: Timpanogos Incorporated is an accrual-method, calendar-year corporation. For 2021, it reported finan...

A: H

Q: In a recent survey, 60% of the community favored building a health center in their neighborhood. If ...

A: given that n =14,p=0.6, p(x=5)=?

Q: The annual salaries of a group of employees are given in the following tables: Salaries (in $ '000) ...

A: x Frequency (f) f⋅x f⋅x2 45 3 135 6075 50 5 250 12500 55 8 440 24200 60 7 420 25200 65 9 5...

Q: box contains 5 green and 3 orange balls. If three balls are taken at random with replacements, what ...

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Q: A person drives for 200 kilometres at a speed of 30 k.p.h. He drives another 200 kilometres at a spe...

A: The speed of the person to cover 200 km = 30 km/h The speed of the person to cover 200 km = 20 km/h ...