What are the difficulties of learning random variable and probability distribution?

Q: researcher wishes to​ estimate, with 95​% ​confidence, the population proportion of adults who suppo...

A: Given that  Margin of error =E =0.04 95% confidence .

Q: According to an​ almanac, 60​% of adult smokers started smoking before turning 18 years old. ​(a) If...

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Q: What is the correct definition of interaction?

A: Interaction is a statistical concept of ANOVA.

Q: A researcher claims that the stomachs of blue crabs from Location A contain more fish than the stoma...

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Q: 1. What do you call the set of all data that researchers want to investigate? C. random D. sample 2....

A: Here use basics of population and sample 

Q: Find the areas under the curve to the left of the given Z's. 1. Z = - 2.40 2. Z= - 1. 59 3. Z = - 3....

A: Required probability is P(Z>-2.40)

Q: A study indicates that 18- to 24- year olds spend a mean of 115 minutes watching video on their smar...

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Q: Hurricane Damage Find the percentile rank for each value in the data set. The data represent the val...

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Q: A recent study of 350 people showed they checked their social media (M) an average of 58.1 times a w...

A: Given,sample size (n)=350sample mean(x¯)=58.1standard deviation(s)=34.4H0:μM=56Ha:μM≠56

Q: The following data on price ($) and the overall score for 6 stereo headphones that were tested by Co...

A: For the given data FIND   a. Does the t test indicate a significant relationship between price and t...

Q: Random variable X arises from a binomial experiment. Use n = 8 and p = 60% nswering the following: %...

A: Given that n =8,p=0.60 Find mean =? variance =? s.d =?

Q: (b) Find the critical value(s) and identify the rejection region(s) (Use a comma separate answers as...

A: Given that  Sample size n =11 Degree of freedom =df  df= n -1 Level of significance =0.01

Q: In a random sample of 72 people, 36 are classified as "successful." a. Determine the sample proporti...

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Q: Plot the numbers −56 and 73 on the number line below.

A: Plot the numbers −56 and 73 on the number line below.

Q: The u.s. Bureau of labor statistics reported the mean hourly wage rate for individuals in executive,...

A: Given that mu =26 ,sigma =4,n =115 p( x bar > 27 ) =?

Q: A researcher is interested in predicting the number of homessold from years in business as a real es...

A:  Regression analysis is a statistical technique that is very useful for these types of problems. For...

Q: Find the following probabilities for the standard normal random variable z (1 point) Find the follow...

A: We have given that the standard normal random variable z  Note: According to Bartleby expert guideli...

Q: of sighihcance a. Assume the samples are random and dependent, and the populations are normally dist...

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Q: NEWS 21.12 Gun control. A March 2018 Gallup survey asked a sample of 1041 adults if they wanted stri...

A: From the provided information, Sample size (n) = 1041 From which 697 of the survey respondents said ...

Q: C. Find the areas right of the given Z's 1. Z = 2.50 2. Z = 1.38 3. Z = 3.02 4. Z = .54 WBT 9d d the...

A: e)P(2.50<Z<3.02)=?

Q: What are the advantages and disadvantages of the scattergram method as compared to the high-low meth...

A: Statisticians use both scatter gram and high-low method in calculating the cost function. 

Q: Illustration 16.60. A bank has a test designed to establish the credit rating of a loan applicant. I...

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Q: The probability that an 18- to 24-year-old spends more than 135 minutes watching video on his or her...

A: (C) Let X be the random variable from normal distribution with mean (μ) = 115 and standard deviation...

Q: C. Between 3 to 5 motor accidents? 3. Based from previous record of a bank operating inside a univer...

A: A discrete random variable X is said to follow Poisson distribution with parameter λ, if its probabi...

Q: thus the reLL For Questions 7 through 9, consider the following experiment. A box contains 3 black, ...

A: From the provided information, A box contains 3 black, 5 red and 1 purple and 6 yellow marbles. Tota...

Q: ​(a) Construct a binomial probability distribution with the given parameters

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Q: A pet association claims that the mean annual cost of food for dogs and cats are the same. The resul...

A: Given that 

Q: Answer the following. 1. Find tæ/2 for a 99% confidence interval of a sample with size 20. 2. Find t...

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Q: basic elements of sampling?

A: Basic Elements of Sampling:-  The basic idea of sampling is that by selecting some the elements in a...

Q: The average manufacturing work week in metropolitan Chattanooga was 40,1 hours last year. It is beli...

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Q: 8. At a convention there are 7 mathematics instructors, 5 computer science instructors, 3 statistics...

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Q: Calculate S S= 0.376 (Round to three decimal places as needed.) (d) Find the standardized test stati...

A: Given that  Sample size n =6 And already calculated  Difference of mean d- =0.917 Sd=0.376

Q: 2. Here is the equation of the list squares of regression line: y=31.9-0.304x. Sample size is 13. S=...

A: Given : Y = 31.9 - 0.304 xS = 3.667Sx = 13.033x = 58.23

Q: An engineer wants to determine the effectiveness of a safety program. He collects annual loss of hou...

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Q: In what are we confident after we’ve calculated a 95% confidence interval – the value of that partic...

A: still wrong. The 95% is not for the construction of the interval, but for the method of constructing...

Q: Please see below. I need to see if this is correct and whether there is another way to find the answ...

A: Given that  Sample size n =100 Favorable cases x =7 Sample proportion p^=x/n   

Q: mple random sample of size n = 15 is drawn from a population that is normally distributed. The sampl...

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Q: A confidence interval for a population mean has length 26. a. Determine the margin of error. b. If t...

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Q: 8, and the sample standard deviation, s, is found to be 4.6. ...

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Q: An important problem in industry is shipment damage. A electronics distribution company ships its pr...

A: For the given data Find the 95% confidence interval for mean

Q: A developer who specializes in summer cottage properties is considering purchasing a large tract of ...

A: The dependent variable is Price. The independent variables are lot size, trees and distance. This mu...

Q: The Wall Street Journal reported that 33% of taxpayers with adjusted gross incomes between $30,000 a...

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Q: Question (5): Control charts for X and Rare maintained on dissolved iron content of a certain soluti...

A: Solution: Given information: m= 25 Subgroup size  n= 5 Sample size  ∑X= 390.8X=∑Xm=390.825=15.632∑R=...

Q: 2.Handin Let Y,, Y2, .,Yn denote a random sample from a power family distribution with parameter 0. ...

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Q: Coffee: The National Coffee Association reported that 64% of U.S. adults drink coffee daily. A rando...

A: Given that  n=225 , p=64%=0.64

Q: 7. As a researcher, you ask the people of your barangay on how they spent their money during the com...

A: Here we have used basics of sampling distribution

Q: In a study of the accuracy of fast food​ drive-through orders, one restaurant had 32 orders that wer...

A: Assume that p is the true proportion of inaccurate orders among all restaurants.

Q: Listed below are amounts (in millions of dollars) collected from parking meters by a security servic...

A: listed below are amounts ( in millions of dollars ) collected from parking C.V =?  by the security s...

Q: Using the numbers 1, 2, 3, 4, 5, and 6 as the elements of the population, find the mean of the sampl...

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Q: Suppose a box contains {0, 2, 3, 4, 6}. Suppose that 225 draws are made at random with replacement. ...

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