Given the following scores of students in a test: 5,7,11,12,13,18 a) add 8 to each score then find the standard deviation. b)  multiply each score by 7 then find the standard deviation

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A: We have given that.   X~N( μ , ?^2 )   μ =290 , ? =46   Z-score =( x - μ )/?

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Q: 4. If a random variable X with the following distribution has mean value of 0.6, find -10 1 2 P(X=x)...

A: We have given that  Probability mass function.  E(x)= ∑x×p(x)E(x2)=∑x2×p(x)Var(x)=E(x2) - [E(x)]2

Q: Indicate whether the study described is an observational study or a controlled experiment. A group ...

A: Observational Study:  We measure or survey members of a sample without attempting to influence them ...

Q: Suppose 208 subjects are treated with a drug that is used to treat pain and 52 of them developed nau...

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Q: Given the population size with a corresponding margin of error, determine the sample size of each of...

A: Solution: Given information: N= 2500 Population size  e = 5%= 0.05  margin of error.   

Q: The table below shows the respective probabilities that a number of power failures will strike a cer...

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Q: Example 4-19. There are (N + 1) identical urns marked 0, 1, 2,., N each of which contains N white an...

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Q: 39 45 45 65 70 75 90 100 185 209 260 325 450 1750 2500 D The range of the sample data is dollars. (T...

A: given data : 39,45,45,65,70,75,90,100,185,209,260,325,450,1750,2500

Q: a.) construct a binomial distribution using n=8 and p=0.36 x                        P(x) 0 1 2 3 4 5...

A: Given : N=8 P=0.36

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Q: Find P(V), the probability that the person voted.

A: Let us define some events C : a person is Conservative. L : a person is Liberal. I : a person is Ind...

Q: 20. Given a sample with a mean of 94 and a standard deviation of 17, calculate the following probabi...

A: Let X be the random variable from normal distribution with mean (μ) = 94 and standard deviation (σ) ...

Q: 3.65 The following table gives the frequency distribution of the number of hours spent per week play...

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Q: Topic: Normal Distribution Please show correct solution. 1. A vegetable distributor knows tha...

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A: GivenThe least-squares regression line is y=34.0812+10.6698*x

Q: For any age t > 0 you are given R000 (120 - 0(+ 150) Po %3D 18000

A: From the given information, pt0=118000120-tt+150, t>0 Formula: μt=-ddtpt0pt0   Consider, μt=-ddtp...

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Q: Consider the following random sample of data:   12, 27, 29, 14, 23, 4, 10, 1, 109, 20     a)  W...

A: We know that.  Observations in the ascending order are :1,4,10,12,14,20,23,27,29,109

Q: Using the information provided below, calculate the confidence intervals for both Student A  Mean: ...

A: We have given that  Mean: 3.2 Standard deviation: 4 N: 160

Q: The Acme Company manufactures widgets. Th distribution of widget weights is bell-shaped. The widget ...

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Q: I feel lik I did something wrong here, but I am not sure where. Can someone help me find my mistake?

A: Given the distribution represents the number of credit cards people own: X 0 1 2 3 4 P(X) 0.18 ...

Q: Assume that adults have IQ scores that are normally distributed with a mean of u = 100 and a standar...

A: GivenMean(μ)=100standard deviation(σ)=20

Q: b. In a Pew Research Center poll on driving, 58% of the 1182 respondents said that they like to driv...

A: b) The percentage of respondents said that they like to drive is 58%.

Q: Suppose that Z~N(0,1). Then find Pr(2.78 < Z < 2.84). You may use Excel. Please enter your answer as...

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Q: From the data please state the intervals and what this tells us about the silver content between coi...

A: Given that  μ1 mean of Coin 1 μ2 mean of coin 2 Difference μ1-μ2 90% Confidence interval for differe...

Q: Times for a surgical procedure are normally distributed. There are two methods. Method A has a mean ...

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Q: Calculate the range of the data.  16     22     17     18     22     19     21     20      18     2...

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Q: Nith the following data in 6 cities calculate the coefficient of correlation by earson's method betw...

A: Population  number of deaths 30 300 90 1440 40 560 42 840 72 1224 24 312

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A: In this case, X follows Uniform distribution [2, 4]. Here, the probability density function of X is ...

Q: Consider a double-sampling plan for which the size of the first sample is 30 while the size of the s...

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Q: Use a χ2​-test to test the claim σ≥40 at the α=0.05 significance level using sample statistics s=36....

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Q: In a completely randomized design, 15 experimental units were used for the first treatment, 19 for t...

A: Given that  SSTREATMENT=1100 SSTOTAL=2000 n=15+20+19=54 SSTOTAL=SSTREATMENT+SSERROR  MSTREATMENT=SST...

Q: In the experiment of rolling a pair of dice, the events A, B and C are defined as A: getting 2 on th...

A: Given that In the experiment of rolling a pair of dice, the events A, B and C are defined as A: gett...

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Q: What type of graph is this? Food Expenditures 500 400 300 200 100 Cereals and Meat, poultry, Dairy p...

A: We have to identify type of graph used.

Q: A survey to find out if families living in a certain municipality are in favor of No mask No entry w...

A: Strata No. of Families (N) Number of Samples (n) Class A 1000   Class B 1500   Class C 2500   ...

Q: In a glass factory the task of quality control was done with the help ot means (X) and standard devi...

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Q: Question 1 Grouped Data Intervals 0-3 4-7 8-11 12-15 Frequency 3 2. 4 Ungrouped Data 13, 18, 13, 14,...

A: Dear student as per guidelines I solved the first question The grouped and ungrouped for the data is...

Q: Used Car Sales A used car dealership uses past data to estimate the probability distribution for the...

A: X 0 1 2 3 4 P(X) 0.28 0.31 0.2 0.17  

Q: 4. Find the Skewness and

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Q: The distribution of the ages of all IRSC students Is known to be normally distributed with a mean of...

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Q: (a) Find the standard error of the mean for each sampling situation (assuming a normal population). ...

A: we know that ,standard error(SE)=σn