I Find the variance and standard deviation. Show your solution. 2. 1 2 3 4 P(x) 0.11 0.22 033 0.44 0.55

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Q: As shown in the table, the average number of siblings (sibs) for 1018 middle class adults is 3.15. B...

A: Introduction: It is required to determine if the middle class of the country come from smaller famil...

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Q: You measure 42 dogs' weights, and find they have a mean weight of 66 ounces. Assume the population s...

A: Given,sample size(n)=42population standard deviation(σ)=12.1α=1-0.95=0.05α2=0.025Z0.025=1.96     (fr...

Q: Identify the type of sampling method. Write your answer on a separate sheet of paper. 1. The teacher...

A: For the given each of the five statements we need to choose the correct sampling method.  

Q: Pay your bills: In a large sample of customer accounts, a utility company determined that the averag...

A: Given that ; Population mean = 11  Standard deviation = 5 By using the standard normal distribution ...

Q: Pain: A recent survey asked 830 people how many days they would walt to seek medical treatment if th...

A: Number of Days Frequency 0 28 1 437 2 263 3 75 4 16 5 11 Total   830

Q: Suppose that A and B are events for which Р(A| B) — 0.8, Р(В A) — 0.15, and Р(A) — 0.2. P(B) =

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Q: A manufacturing machine has a 2% defect rate. If 9 items are chosen at random, what is the probabili...

A: Binomial distribution is given by

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Q: Chi-Square distribution having one (1) degree of freedom will be asymptotic on x-axis only

A: Here use graph of chi square distribution with df =1 

Q: y=95% , Confidence Level = 99% , n = 20- Two-sided Tolerence Interval

A: Givenγ=95%Confidence interval =95%n=20 For any series of measurements let the sample mean and standa...

Q: ) (i) What is a simple hypothesis? Define the terms size and power for a test of one simple hypothes...

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Q: Define and describe the reproducibility crisis with reference to the this figure shown above. Descri...

A: Replication is the process of repeating research to determine the extent to which findings generaliz...

Q: In a random sample of 375 students at a university, 318 stated that they were nonsmokers. Based on t...

A: It is given that Sample size n = 375 Number of nonsmokers, X = 318 The critical value of Z at 90% co...

Q: Using a cutoff of 0.05, is it unusual for an asthma patient to be 85 years old or older?

A: It is given that Total = 409743 Number of asthma patient 85 and up = 16768

Q: What is an appropriate summary statistic for the variable Story? WorldGross Budget Profitability 64....

A: As the variable 'story' is a nominal data set.   

Q: Use the California method in the linear interpolation formula to estimate the 86.81 percentile for t...

A: 86.81th percentile, P86.81= L+h(86.81*n/100-cf.)/f Here L is the lower limit of modal class. h= widt...

Q: You measure 22 backpacks' weights, and find they have a mean weight of 57 ounces. Assume the populat...

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Q: Tolerance Intervals bounds a selected proportion of a normal distribution with set confidence level ...

A: We have given that,  Tolerance intervals bounds proportion of normal distribution with set confidenc...

Q: The mean number of hours of sleep that a college student gets per night is 6 hours with a standard d...

A: Given data,Mean μ=6sd    σ=3n=20P(X<5)=?

Q: 9. You are given the following information about advertising expenditure and sales: Adv. Exp. (X)- S...

A: By regression we mean estimation or prediction of the average value of one variable for specified va...

Q: Calculate the index number using both the Aggregate Expenditure Method and Family Budget Method for ...

A: Solution is given:

Q: Words:O QUESTION 3 In a consumer reports article, the magazine reported that 207 of 316 chicken brea...

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Q: TABLE A shows the number of success data obtained from a standard and new procedure of bio engineeri...

A: We have given,  x1= 73 n1= 120 x2= 101 n2= 120 significance level, 0.05

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Q: Suppose a jar contains 19 red marbles and 10 blue marbles. If you reach in the jar and pull out 2 ma...

A: Given that : A jar contains  Red marbles = 19 Blue marbles = 10  Total marbles = 29   By using the c...

Q: How much "error" is too much before you are no longer confident about your estimates or research fin...

A: Given information: Margin of error is defined as the half the width of the confidence interval. 

Q: A researcher hypothesized that children's cholesterol levels may be affected by educating their pare...

A: In hypothesis testing, there are always two hypothesis. These are null and alternative hypothesis. T...

Q: () I Example 69. The geometric mean of 10 observations of a certain variable was calculated as 16.2....

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Q: Assuming the outcomes to be equally likely, find the probability that first answer is "True." The pr...

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Q: Prepare a 2x 2 table from the following information and calculate Yule's Coefficient of Association ...

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Q: A hospital wants to be 95% confident that its error is less than two hours in estimating the average...

A: Here given margin of error less than 2 hour Confidence level = 95%

Q: 3. The data on the number of minutes that patients had to wait for their appointment with 5 doctors....

A: ( 3 ) For the given data perform  hypothesis test for Anova: Single Factor

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A: Given that we are first taking out n1 values from N, The probability for any of the N values to be s...

Q: To determine whether or not they have a certain disease, 104 people are to have their blood tested. ...

A: Here for group of 13 people probability that 1 test is required =P(none of 13 have disease) = (1-0.0...

Q: For the data set 1 2 3 57 7 8 9 10 12 13 13 14 14 15 16 16 19 19 21 23 23 23 24 26 26 27 27 28 28 31...

A: Given data set 1,2,3,5,7,7,8,9,10,12,13,13,14,14,15,16,16,19,19,21,23,23,23,24,26,26,27,27,28,28,31,...

Q: You run a PPM correlation on sprint speed and vertical jump height in NFL running backs and find an ...

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Q: Following is the probability distribution of a random variable that represents the number of extracu...

A: Let X be the random variable which represents the number of students of extracurricular activities h...

Q: Mean= 100 and standard deviation=10, what is probability of x110

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Q: You work for the U.S. Food and Drug Administration. You have gotten word that a drug manufacturing i...

A: Formula : CI=point estimate ± ME

Q: Three ballpoint pens are selected at random from a box that contains 2 blue pens, 2 red pens, and 2 ...

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Q: If a seed is planted, it has a 60% chance of growing into a healthy plant. If 12 seeds are planted, ...

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Q: The polulation of a certain town, as obtained from the census data, is shown in the following table....

A: Solution is given below:

Q: What is the probablity that a customer will pay with a credit card?    B) A customer did not pay w...

A: Let us define some events A : the purchase is more than $5 B : the purchase is $5 or less. E : the c...

Q: Men's heights are normally distributed with a mean of 68.4 in and standard deviation of 2.6 in. Use ...

A: Let X be the random variable from Normal distribution with mean (μ) = 68.4 and standard deviation (σ...

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

A: We have given that the statement about the Chi square distribution curve.

Q: Example 62. The following table gives the weight (in Kg) of 60 students. Find.the value of Mode grap...

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Q: For a redundant system with n independent identical components with constant failure rate 2, show th...

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Q: Consider the following two-parameter normal family with PDF 1 f(x; μ, σ) - - o 0. Find the MLE for ...

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