following best describes a stratified sample of passengers?

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A: From the given Histogram we want to know it is normal or not

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A: Find the distribution of Q12+Q2   

Q: Can you help me with this two question, this is my last question thank you

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A:

Q: rrom the following ultimate class frequencies of the positive and negative classes and the total num...

A:

Q: Exercise 4.2. The weights of bags of red gravel may be modeled by a normal distribution with a mean ...

A: Solution-: Given: μ=25.8kg,σ=0.5kg (a) P(a randomly selected bags of red gravel will weight between ...

Q: Q. 18. Calculate mode from the following 15 observations : 5, 4, 8, 7, 12, 18, 17, 30, 8, 12, 20, 12...

A:

Q: A marriage counselor has traditionally seen that the proportion p of all married couples for who...

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Q: Example 4. Construct a sampling distribution of the sample mean for the following pulation when rand...

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Q: Suppose we have two groups of students, those who go for tutoring help and those who do not. The fol...

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Q: Which of the following statements are true? Mark all that apply. If events A and B are independent,...

A: Here correct statements are, If P(A) is probability that the event A occur, then probability that th...

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A: For the given data Find ( b ) b0 = ? b1 =? ( c ) forecast year 10

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A: 4.4)GivenMean(μ)=8standard deviation(σ)=36

Q: 13.6. The price quotations of four different com- moaities for 1951 and 1965 are given below. Calcul...

A:

Q: Please use permutations in your solutions, these are all related to permutations, so I hope everythi...

A: Given:  group 10 people using permutation how many different ways to choose the officers  

Q: A medical researcher wants to compare the pulse rates of smokers and non-smokers. He believes that t...

A: Given: n1=20, n2=20 x1=76,  x2=72σ1=9, σ2=10α=0.06

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A: Given information: It is given that the department of health is conducting random drug testing in a ...

Q: math class consists of 22 female students and 10 male students. Two students are selected at random ...

A: Given: 22 female 10 male total =22+10=32 people  

Q: 402 360 389 364 415 375 367 409 362 358 (a) Assuming that shear strength is normally distributed, es...

A: Given: x 402 360 389 364 415 375 367 409 362 358  

Q: A population consist of the five numbers 2,3,6,8, and 11. Consider samples of size 2 that can be dra...

A:

Q: When two independent variables produce effects when combined that would not be present if each indep...

A: In a factorial design experiments as we can say when two independent variables produce effect when c...

Q: From Actuarial Math Assume that the flow of claims being received by the claim department of an insu...

A: Let X be the number of claims received in 3 hour in the considered insurance company. Here it is giv...

Q: Provide the following probabilities:     - I lose my data as both hard-disks fail.   - Only one...

A: Here given , There are two hard disks  2nd have exact copy of first one

Q: If there are 4 Geometry books, 2 Trigonometry books, and 1 Statistics book, how many ways can he arr...

A: Jacob is a librarian. He has a three-layer bookshelf for references in the school library. The top l...

Q: A researcher wants to know how long it takes, on average, for a certain species of bacteria to divid...

A: Given data is 8.1,7.6,7.7,8.3,8.5,7.9,8.1,8.2,8.2,7.9,8.6,8,7.9,8.5,8.2,8.2,8sample size = 17standar...

Q: 11. (True or False) If you have a low coefficient of variation, you will need to sample more plots.

A: Here use coefficient of variation definitions   

Q: The mean water temperature downstream from a discharge pipe at a power plant cooling tower should be...

A: From the given data select the correct choice  

Q: How do I solve the last problem?

A:

Q: 9. A manufacturing company has designed a new test of mechanical aptitude for its machinists. Scores...

A: Given  Mean=μ=400, standard deviations=σ=60  

Q: II. Solving. Show your solution. 9-10. IQ scores are normally distributed with a mean of 135 and a s...

A: Given,mean(μ)=135standard deviation(σ)=15

Q: In the following probability distribution, the random variable x represents the number of activities...

A: Solution-: We find, (c) Mean of the random variable (d) The standard deviation =?  (e) P(a parent in...

Q: A doctor is interested in determining whether a film about exercise will change 10 persons’ attitude...

A: The objective is to calculate absolute value of t 

Q: The proportion p of residents in a community who recycle has traditionally been 60% . A policy mak...

A: Givenx=126n=215p^=xn=126215=0.5860α=0.10

Q: Each license plate in a certain state has six characters (with repeats allowed). Here are the possi...

A: Here are the possibilities for each character are given We have to find How many license plates are ...

Q: Calculate Bowley's coefficient of skewness from the following data : Class Intervals : 0-5 5-10 10-1...

A:

Q: Independent Samples Test Levene's Test for Equality of Variances t-test for Equality of Means 95% Co...

A: The appropriate conclusion regarding the claim is that if the learning time for both varieties of mi...

Q: ). In two sets of variables X and Y with 50 observations each, the following data were observed. X= ...

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Q: Compute coefficient of quartile deviation from the following data : Marks 10 20 30 40 50 60 No. of S...

A: Given : Marks No. of students 10 4 20 7 30 15 40 8 50 7 60 2

Q: Use table 1 to find each of these probabilities, a. The probability that exactly two defective welds...

A: Here AS per your requirement I have calculated  question 2 Here use given table of probability 

Q: 5.5 7.2 7.3 6.3 8.1 6.8 7.0 7.0 6.8 6.5 7.0 6.3 7.9 9.0 8.6 8.7 7.8 9.7 7.4 7.7 9.7 8.0 7.7 11.6 11....

A: Solution: n1=27n2=20X= ∑Xn1=219.427=8.1259Y= ∑Yn2=172.120=8.605σ12= ∑(X-X)2n1=74.6718527=2.7656σ22=∑...

Q: A particular brand of trans-fat butter was analyzed to determine the level of polyunsaturated fatty ...

A:

Q: Suppose portfolio mean return is 25% and standard deviation 30%. Find the 2 standard deviation range...

A: Explanation Here given the mean and sd values find var will be greater or lesser So in step 2 funded...

Q: Seven of the 100 digital video recorders (DVRs) in an inventory are known to be defective. What is t...

A: Given that ; Seven of the 100 digital video recorders (DVRs) in an inventory are known to be defecti...

Q: If three different orders are selected, find the probability that they are all from restaurant C .  ...

A:

Q: The null hypothesis is always concluded as true, while the alternative hypothesis is always false t...

A: Hypothesis testing is done to draw conclusions about a population parameter.

Q: What does the R2 in a regression analysis describe?

A: here use basic definition of coefficient of determination 

Q: A national survey found that 46% of adults ages 25-29 had only a cell phone and no landline. Suppose...

A: Givenp=0.46n=4Let "x" be the no.of adults have only a cell phones and no landline x~Binomial(n=4,p=0...

Q: A researcher designs a study to determine whether female preschoolers prefer sweetened or unsweetene...

A: Given that - A researcher designs a study to determine whether female preschonkers prefer sweetened ...

Q: 3.3 GRE Scores, Part I. Sophia took the Graduate Record Examination (GRE) and scored 160 on the Verb...

A: Introduction: Denote X1 as the random variable representing the score of a randomly selected student...