The lengths of metal bolts are normally distributed with mean u cm and standard deviation 7 cm. If 2.5% of the bolts measure more than 68 cm. find the value of u.

Q: Assume the random variable X is normally distributed with mean u = 50 and standard deviation o = 7. ...

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Q: The following tables about student scores in Physics and Statistics # OF STUDENTS PHYSICS STATISTICS...

A: please find the answer of your questions in below images:

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A: Here first we will find mean and standard deviations for both and use two sample t-test for two tail...

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

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A: Comment: As per the our company guidelines we are supposed to answer only three subparts. Kindly rep...

Q: Activity No. 2: Read and Answer the following questions. 1. A psychologist found in her study that t...

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Q: Show: Step 1: State the hypothesis Step 2: The level of significance, degree of freedom and critical...

A: Population mean = 45 minutes Sample mean = 50 minutes N=28 Standard deviation deviation = 6 minutes ...

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Q: Your friend gives you the data from a day of taco sales at each of the 40 food trucks, and asks you ...

A: Omitted variable bias occurs when a regression model has irrelevant explanatory variables that effec...

Q: (c) Use a = 0.2 to compute the exponential smoothing values for the time serles. Time Serles Value W...

A: Exponential smoothing is a method of forecasting in which we use the last predicted value and the la...

Q: 4x - 7x Differentiate with respect to 'x' 6x + 5

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Q: 4. Suppose Y,, Y Y, is an iid sample from a N(u, o') population distribution. Let Y and S' denote th...

A: We want to find the pdf of Q12+Q2  

Q: Solve the problems and show your complete solutions. A Marketing researcher randomly selects 20 fema...

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Q: The following data represent the concentration of dissolved organic carbon​ (mg/L) collected from 20...

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Q: of LO %24 2. Based on their records, a hospital claims that the proportion, p, of full-term babies b...

A: For the given data Perform z test for one proportion test

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Q: The marks scored by 50 students in an examina- tion paper are given below: 30 45 48 55 39 25 31 12 1...

A: From the provided information, Number of students (N) = 50

Q: Tessniian 300 10) A researcher claims that more than 51% of U.S. adults think that the IRS is not ar...

A: Given that; Population proportion (Po) = 51% Sample size (n) = 400 Sample proportion ( P) = 58%  By ...

Q: Do you find any inconsistency in the data given below: N= 1,000, (AB) = 483, (Ay) = 378, (BY) = 226 ...

A: Given that, N = 1000, (Aβ) = 483, (Aϒ) = 378, (Bϒ) = 226, (A) = 525, (B) = 312, (C) = 470 and (ABC) ...

Q: 1. The average length of time for students to register for classes at a certain college has been 40 ...

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Q: Suppose that the waiting time for a college campus shuttle is uniformly distributed between 8 and 28...

A: Given : x follows uniformly distributed between 8 and 28 minutes. a = 8b =28 Worst 15% of all waitin...

Q: If the standard deviation of hole diameter exceeds 0.01 millimeters, there is an unacceptably high p...

A: In this test, checking whether the standard deviation of hole diameter exceeds 0.01 millimeters.

Q: Kwame, a social psychologist, wants to know if people would commit mischievous acts if they knew the...

A: Hi! Thank you for the question, As per the honor code, we are allowed to answer three sub-parts at a...

Q: Find the correct coefficient of correlation.

A: Here use correlation coefficient formula 

Q: 13.14. Owing to change in prices the consumer price index of the working class in a certain area ros...

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Q: (c) Use a = 0.2 to compute the exponential smoothing values for the time series. Time Serles Value W...

A: Please find your answer in below images:  

Q: "The weights of 1,000 children, in average, is 46kg with standard deviation of 11kg. Suppose the wei...

A: Consider that the mean and standard deviation of a random variable X are µ and σ, respectively. Thus...

Q: Suppose that a new treatment is successful in curing a common alment 63% of the time. If the treatme...

A: It is given that n=100 and p=0.63.

Q: Giving a test to a group of students, the grades and gender are summarized below A В C Total Male 12...

A: Given that  Group of students grades and gender are summarized. Total number of people (n) = 49 Conf...

Q: Illustration 14.6. Extrapolate the cost of living index for 1972 from the following data: Year Cost ...

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Q: ales that the mean caffeine content per 12-ounce bottle of cola is 55 milligrams. You want to test t...

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Q: A ball is drawn randomly from a jar that contains 6 red balls, 4 white balls, and 8 yellow ball. Fin...

A: We have given that the jar contains 6 red balls, 4 white balls and 8 yellow balls. The total number ...

Q: An experiment consists of choosing a subset from a fixed number of objects where the arrangement/ord...

A: If the number of objects where the arrangement or order is not important then will use there combina...

Q: Compute MSE. (Round your answer to two decimal places.) MSE %3D What is the forecast for week 7?

A: Here use forecasting formulas 

Q: Ten percent of Americans are allergic to ragweed. Suppose a random sample of 200 people is selected....

A: Given: n = 200 p = 0.10  

Q: d. Find the probability that a randomly selected program contains at least two syntax errors. e. Fin...

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Q: (a) Compute the population mean, H. H= 51 (b) Compute the mean for all 5C2 = 10 samples with size n ...

A: The population data is given by 41,57,49,54,54

Q: In a trivariate distribution: 01 = 3, 02 = 4, 03 = 5 123 = 0-4, r31 = 0-6, 13 = 0-7 %3D Determine th...

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Q: According to a government commission, 70% of the nation's households have VCRS. In a random sample o...

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Q: Tomorrow a sum of PhP10,000 will be invested at rate R. Tomorrow's rate is unknown at the moment, so...

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Q: A nutritional measured not only how many helpings of vegetables 125v grade- school children were eac...

A: Solution: The explanatory variable in this  example  is  The helpings of vegetables. The response va...

Q: Find the winner using the pairwise method and determine if the winner is also the Condorcet winner. ...

A: According to the policy , we can provide you the answer of first four questions.

Q: A newsgroup is interested in constructing a 90% confidence interval for the proportion of all Americ...

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Q: Q1. Which of these hypotheses has an upper-tail Test? A. Ηρ: μ= 10 ; H: μ > 10. B. Ho: μ= 10 ; Η: μ ...

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Q: Suppose we sample from an exponential distribution with parameter 0. In the class we con- structed a...

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Q: Steel rods are manufactured with a mean length of 27 centimeter (cm). Because of variability in the ...

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Q: Days Sick Monday 365 Tuesday 270 Wednesday 300 Thursday 300 F...

A: Chi-square test : Pearson's chi-squared test and its variants Pearson's chi-squared test is used to ...