Roll numbers of % of marks in Statistics % marks in Students Accountancy 11 50 80 12 60 71 13 65 60 14 70 75 15 75 90 16 40 82 17 70 70 18 80 50 Compute the rank correlation coefficient

Q: (1) Write out the regression equation  (2) What is the sample size used in this investigation?  (3) ...

A: 1) From the output, the coefficient of constant is 42.085

Q: A researcher wished to find out whether the perceptions of a persons height depends on that person’s...

A: The objective of the researcher was to find whether the perception of a person's height by the army ...

Q: 1. Defective DVDS From past experience, a company found that in cartons of DVDS, 90% contain no defe...

A:   Given problem Given that   From past experience, a company found that in cartons of DVDs, 90% cont...

Q: B. Classify each sample as simple random, stratified, or cluster. 6. Every 14th customer entering SM...

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

Q: Consider repeated rolling of a fair die, and assume that the different rolls are independent. For i ...

A: Given information: Rolling a fair die and different rolls are independent.  

Q: The lifespans of the light bulbs produced by a Filip Company are normally distributed with a mean of...

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Q: My children had magnetic fridge letters when they were young. The set contained all 26 letters of th...

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

Q: To assess whether two data sets are derived from the same distribution—which need not be known, you ...

A: To assess whether two data sets are derived from the same distribution—which need not be known, you ...

Q: Find Spearman's rank coefficient of correlation from the following data : 21 34 15 79 42 X : Y : 50 ...

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Q: Determine the graph, probability notation and area in percent of the following. 1. At most z=2.25 2....

A: we have to find given probability by using z score table...

Q: Question 2 There are hundreds of apples on the trees, so you randomly choose just 85 apples and get ...

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Q: In a random sample of seven ​people, the mean driving distance to work was 22.1 miles and th...

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Q: The hypothesis shown below is being tested. The test statistic calculated by the analyst was Z = +1....

A: The test statistic is 1.76 This is a two-tailed test as the direction of alternative hypothesis is "...

Q: According to the WHO MONICA Project the mean blood pressure for people in China is 128 mmHg with a s...

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Q: It is estimated that 12% of the vehicles entering Canada from the United States carry undeclared goo...

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Q: Giving a test to a group of students, the grades and gender are summarized below A В Total Male 10 1...

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Q: With a view to study whether the working condition in a factory had any influence on the frequency o...

A: Let A represents less, a represents More B represents Good and b represents Bad.  Then  (AB)= 280 (a...

Q: the data attached, please fill in BOTH blanks: The slope increases from 3,330 to ____ dollars/carat ...

A: Slope = SP/SSx Intercept = My- slope *Mx My= mean of y Mx= mean of x

Q: 9. An exacta wager at the racetrack is a bet where the bettor picks the horses that finish first and...

A: Given information: An exacta wager at the racetrack is a bet where the bettor picks the horses that ...

Q: 32. 93% confidence Find z* for a 93% confidence interval using Table A or your calculator. Show your...

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Q: direct mail company wishes to estimate the proportion of people on a large mailing list that will pu...

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Q: In a group of children the probability a child had black hair is 0.7. The probability that a child h...

A: We have given that  P( black hair ) = 0.70 P( brown eyes ) = 0.55 P( black hair or brown eyes ) = 0....

Q: At the a = 0.05 level of significance, the most accurate statement concerning the decision to be %3D...

A: In this case, the level of significance is α = 0.05.

Q: Women's shoe sizes are (approximately) normally distributed, with an average size of 8.076 and a sta...

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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: The following summary data relate to the adult population of a small village: Adult population Numbe...

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Q: Anne has 4 friends and 5 coworkers. Each day in the year 2019, Anne talked to some number of friends...

A: Anne has 4 friends and 5 co-workers. On any given day, she can talk to atleast 1 but never 4 friends...

Q: Calculate geometric mean from the following data: 125 1462 38 7 0.22 0.08 12.75 0.5

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Q: Consider an urn with K balls, some of which are white and some are black. At each stage, a fair coin...

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Q: 34. Reporting cheating What proportion of students are willing to report cheating by other students?...

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Q: Below is a probability distribution for the number of math failures of BC students. 1 2 3 4. P(X) .4...

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Q: The distribution of scores on the SAT is approximately normal with a mean of u = 500 and standard de...

A: As per guideline expert have to answer first question three subparts only dear student please upload...

Q: what is the probability that the sample proportion will differ from the population proportion by les...

A:  Goofy' fast food center wishes to estimate the proportion of people in its city that will purchase ...

Q: For a random variable x the expected value of X is equal to 5 and the variance of X is equal to 35. ...

A: We have given that the random variable X has the expected value E(X) is 5 and variance of X i.e,  V(...

Q: Hyunjin is a famous model and has great taste in clothes. His mom ask him to pick any  jacket, shirt...

A: Given : No. of shirts = 8 No. of Jackets = 3 No. of shorts = 5  

Q: Fill in the P (X=x) values to give a legitimate probability distribution for the discrete random var...

A:  

Q: Consider the hypothesis test Ho : 41 = 42 against H1 : 41 # 42 with known standard deviations o = 11...

A: Given that,           σ1=11σ2=5n1=10n2=15x¯1=4.8x¯2=7.9α=0.05 The Z-test statistics is given by     ...

Q: Calculate the coefficient of concurrent deviation from the following : X : 60 55 50 56 30 70 40 35 8...

A:

Q: Suppose that the speed at which cars go on the freeway is normally distributed with mean 80 mph and ...

A: GivenMean(μ)=80Standard deviation(σ)=7

Q: that customer consumes. Round all answers to 4 decimal places where possible. a. What is the distrib...

A: We have given that the amount of calories is normally distributed with mean 2999 and standard deviat...

Q: where 0 > 0 is a parameter. Assume that 0 < a1 < 5 and 0 < a2 < 5. Using the pivotal quantity U = 0²...

A:

Q: Of all the registered automobiles in Colorado, 8% fail the state emissions test. Twelve automobiles ...

A: Consider, x is a random variable that all registered automobile in Colorado fails the emission test....

Q: Given X ~B(6, 0.29) find the probability: P(X_2)

A: Given  X~Bin(n=6,p=0.29)

Q: Employers want to know which days of the week employees are absent in a five-day work week. Most emp...

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

Q: Given Q = 18, Q3 = 25, Mode = 21, Mean = 18, find the coefficient of %3D %3D skewness.

A:

Q: A plane's consumption of gas is normally distributed. Assume the mean is 250 L per day and the stand...

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Q: Question 3 Determine the coefficients a and B of the following equation f (x) = ax and the standard ...

A:  f(x) = ax and the standard deviation is given as σ σ = sn-m x y 3 0.2 3.5 0.45 4 0.35 4....

Q: If n=10n=10, ¯xx¯=37, and s=8s=8, construct a confidence interval at a 99% confidence level. Give yo...

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Q: how many five letter codes can be made if each chosen letter (from the the original 7 letters) can o...

A:

Q: A car lot wants to predict the # of car accessories they need to sell monthly based on the number of...

A: The coefficient of determination is 0.6364.