In a normal distribution with a mean of 72 and a standard deviation of 12, what percentage of cases will fall above 80?

Q: r numbers 6 to 7: The the campus. He tasked an office to determine the total number of laboratory ro...

A: Simple random sampling: It is a type of probability sampling in which the researcher randomly selec...

Q: 5. Suppose there are n trials in a binomial experiment, but 0 is unknown. Let X be the random variab...

A: c) From the given information, EX=nθVX=nθ1-θ Consider, EXn=1nEX            =1n*nθ            =θ  

Q: Now suppose one wants to assess how accurate is the approximation of une average expected score u by...

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Q: Find out the combined mean and standard deviation from the following data : Series A Series B Number...

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Q: The distribution of the variance (Chi-Square distribution) becomes more like a normal distribution a...

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Q: Given the following, determine the regression equation of : () X1 on X2 and X3 (ii) X2 on X1 and X3 ...

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Q: From the following data compute the value of harmonic mean: Class interval 10-20 20-30 30-40 40-50 5...

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Q: eacher X of San Jose National High School examined her research data using “Phonics method of readin...

A: Given: Teacher X of San Jose National High School examined her research data using “Phonics method o...

Q: Given are the scores of 10 employees from their 20-point assessment 16 18 10 8 12 15 19 17 16 7 Calc...

A: Given are the scores of 10 employees from their 20-point assessment Scores are : 16,18,10,8,12,15,19...

Q: What is the mean number of heart failure patients with the condition due to natural causes that ente...

A: Heart failure is due to either natural occurrences (84%) or outside factors (16%). Outside factors a...

Q: n=20, a =0.01 -"/2,n – 1

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Q: Given are the scores of 10 employees from their 20-point assessment 16 18 10 8 12 15 19 17 16 7 Calc...

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Q: A psychologist has designed a questionnaire to measure individuals' aggressiveness. Suppose that the...

A: Define the random variable, X : score on the questionnaire  Suppose mean score of the questionnaire ...

Q: n = 8 a =0.05 x? in

A: Given  Level of significance=ɑ=0.05, n=8

Q: (a) A daily sample of 30 items was taken over a period of 14 days in order to establish control limi...

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Q: y=99% , Confidence Level = 90% , n = 10 One-sided Tolerance Interval

A: Critical value are used to measure the rejection and accepted region. It used to measure the thresho...

Q: Chi-Square distribution curve if sample size if relatively small is right skewed (longer tails on th...

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Q: on: on a short bond paper, solve the following problems. Show your complete solution. I. INDEPENDENT...

A: Two sample t test : he 2-sample t-test (also called the freelance samples t-test) could be a applied...

Q: Scores on the SAT Mathematics test (SAT-M) are believed to be Normally distributed with mean µ. The ...

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Q: Example 2. The first of the two samples has 100 items with mean 15 and standard deviation 3. If the ...

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Q: A six-sided die is rolled twelve times. What is the probability that the die will show an even numbe...

A: Let p be the probability of getting an even number. Then p = 3/6 = 0.5 Let X denote the number of ti...

Q: Determine: a) chain absolute increase for July:     b) base relative increase for August:   c) ba...

A: Given the data as  i ti yi (PLN) 1 May 9 2 June 8 3 July 10 4 August 12 5 September 1...

Q: I collect a random sample of size n from a population and from the data collected compute a 90% conf...

A: Given: I collect a random sample of size n from a population and from the data collected compute a 9...

Q: Marks

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Q: The scores on a standardized test are normally distributed with a mean of 105 and standard deviation...

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Q: 19. what is the sample mean (use X to denote sample mean and 2 decimal places) 20. what is the samp...

A: Calculate the Sample Mean and Sample Standard deviation Using the Excel

Q: 3. In a job fair, 3000 applicants applied for the job. Their mean age was found to be 2 standard dev...

A: Given: n = 3000 mean = 28 standard deviation = 4  

Q: 5. To encourage participation of students in various exchange programs, the Office of International ...

A:     The units involved in the population have an equal chance of selection in probability sampling. ...

Q: Let Y be another random variable such that Y = X2. Find the PDF of Y.

A: Given: random variable x from standard normal variate N(0,1)  let y=x^2  then to find pdf of y ?

Q: Obtain the autocorrelation for an ideal low pass stochastic process.

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Q: A researcher studying reaction time of drivers states that A 95% confidence interval for the m time ...

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Q: A newspaper conducted a statewide survey concerning the 2008 race for state senai newspaper took an ...

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Q: 11. Determine whether each of the following situations is a PERMUTATION or COMBINATION. 1. Arrangeme...

A: Here, we have to identify whether the situation is example of permutation or combination.

Q: A manufacturer knows that their items have a normally distributed lifespan, with a mean of 12.2 year...

A: Let X be the random variable from normal distribution with mean (μ) = 12.2 and standard deviation (σ...

Q: Q8. X is a normally distributed random variable with unknown µ and a known variance, o. X and s' are...

A: Given,sample size=nsample mean=x¯population standard deviation=σα=1-0.95=0.05α2=0.025

Q: The weights of new born black bear cubs are uniformly distributed with minimum of 245 and maximum of...

A: GivenThe weights of new born black bear cubs are uniformly distributed withminimum of 245 and maximu...

Q: Q5. Which is a 90% C.I.? A. X+ 19E B. X+ 164 c. X4 225, D. X+ 175 A. X± 1.99, В. Х+1.64 D. X+ 1.75 О...

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Q: 23. Suppose that a scheduled of flight departs on time, given the probability 0.80, and the prob- ab...

A: Given:  A be the event flight departs on time  and B be the event that flight arrives on time  p(A)=...

Q: An instructor of mathematics wishes to determine the relationship of grades on a final examination t...

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Q: If {Y(t)} is the square law detector process and if Z(1) = Y(t) – E{Y(1)}, show that the spectral de...

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Q: 2. In an attempt to reduce the number of man-hours lost as a result of hospital accidents, a large h...

A: We have given that data  Sample size n =5 NOTE:- According to bartleby guidelines expert can solve m...

Q: Example 23. The coefficient of rank correlation of marks obtained by 10 students in statistics and a...

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Q: demand as a normal random variable with 0 mean and unit variance. What is the power demand value tha...

A: The method treats the system power demand as a normal random variable with 0 mean and unit variance....

Q: jn= 16, α=0.05

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Q: e"e State the CLT for independent identically distributed real RVs with mean u and variance o². Supp...

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Q: A lobbyist is trying to estimate the true proportion of US adults that support an upcoming bill. Whi...

A: Givenapproximation of p = 0.5Margin of error(E)=0.01confidence level = 95%

Q: determine the area to the left of a, the area between a and b, and the area to the right of b.

A: Here use standard normal distribution table 

Q: Mary is packing for a business trip. She packs 4 pairs of shoes, 5 skirts, 4 pairs of slacks, 6 blou...

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Q: Distribution of the braching process Soppose P(Z_1=k)=2^(-k) for k>=0 Determine the Distribution of ...

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Q: A mechanic can service 1,2,3 or more cars each days with their respective proba- bilities of 0.43, 0...

A: (b) 0.31 is correct option. given, x = no. of car service / day  1 2 3 more than 3 (x>3) p =...