Find the value of z that has 72% of the standard normal distribution's area to its left. Report your answer to the nearest hundredth.

Q: The mean value of land and buildings per acre from a sample of farms is $1700, with a standard…

A: a. Empirical rule: The probability of the observation lies within 1 standard deviation of the mean,…

Q: X f(x, y) 2 4 1 0.10 0.15 y 0.20 0.30 3 5 0.10 0.15 a. Determine the marginal distribution g(x), x =…

A: Given Information: f(x,y) x 2 4   1 0.10 0.15 y 3 0.20 0.30   5 0.10 0.15

Q: The number of customers served at a busy restaurant on Thursdays follows a Normal distribution with…

A: The mean is 6352 and the standard deviation is 254.

Q: f(x, y): ) = {K(x² + x²) [K(x² + y²) 20 ≤ x ≤ 30, 20 ≤ y ≤ 30 otherwise (a) Determine the…

A: Solution Given That, Each front tire on a particular type of vehicle is supposed to be filled to a…

Q: Q8.2

A: Formula

Q: Q3. Given the set: (11,13,7,9,14,18,10,13,9) a) Find the five number summary of the data set. b)…

A: (a)   Obtain the five number summary.   Use EXCEL Procedure to obtain the value of first quartile.…

Q: A researcher studying public opinion of proposed social security changes obtains a simple random…

A: The sample size n is 25.

Q: A manufacturer of pens has hired an advertising agency to develop an advertising campaign for the…

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Q: Z-Test Z-Test Use the calculator displays to the right to make a decision to reject or fail to…

A: Solution:- from given information Null hypothesis H0:μ=70Alternate hypothesis Ha:μ≠70(Two-tailed…

Q: µ = 3, o² = 9, P(−6 < X <12) a. Determine P(µ − ko < X < µ+ ko) ≥ 1 − 1/k²

A: The question is about Chebyshev's inequality Given : μ = 3 σ2 = 9 So, σ = 3 .... by taking square…

Q: alesperson in a large department store chain is rated on his or her sales ability and potential ed…

A: Given: From the given table

Q: Q1/ Grades in statistics class are weighted as follows: Tests are worth 50% of grade, homework is…

A: Given information: Weights given, Test (W1)=50%Homework (W2)=30%Final (W3)=20%Marks obtained, Test…

Q: A particular brand of​ women's jeans is available in eight different​ sizes, four different​ colors,…

A: Solution-: Given:  Number of different sizes =8 Number of different colors=4 Number of different…

Q: The time it takes me to wash the dishes is uniformly distributed between 8 minutes and 17 minutes.…

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Q: Using The F Distribution Table, find the critical value for a two-tailed F test with a 0.05 and the…

A: Given Information: Significance level α=0.05 Sample 1: s12=135 n1=27 Sample 2: s22=146 n2=13

Q: Jesse scored a +12 while golfing and, 18 points while playing basketball. The statistics for his…

A: The mean and standard deviation of sport golfing are 14.2 and 3.2, respectively.

Q: A gardener has eleven rows available in her vegetable garden to place eleven different vegetables.…

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Q: If a regression equation is used, when are predictions not meaningful?

A: A regression equation is used in statistics to calculate the  relationship, which, exists between…

Q: Determine the expected value of X^2. Determine the expected value of Y^2.  Determine the variance of…

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Q: Adult men have heights with a mean of 69.0 inches and a standard deviation of 2.8 inches. Find the…

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Q: A distribution of values is normal with a mean of 137.5 and a standard deviation of 37.8. Find P57,…

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Q: Randomly selected birth records were obtained, and categorized as listed in the table to the right.…

A: It is needed to test the reasonable claim that whether the births occur with equal frequency on the…

Q: A scatter plot would be useful for:     Showing the relationship between the sales of blank CDs and…

A: The objective is to find the correct option for the scatterplot.

Q: The following estimated regression equation based on 30 observations was presented. ŷ= 17.6+…

A: The value of SST is 1801 and the value of SSR is 1756.

Q: KRUSKALL WALLIS (THREE OR MORE INDEPENDENT SAMPLES) In an experiment to determine which of three…

A: Given information: CS1 CS2 CS3 23 21.2 17.4 17.7 20.8 20.1 21.8 17.1 16.3 20.8 18.6 16.3…

Q: Calculate the mean median mode and standard deviation of the data 21,30, 27, 30, 25

A: Given data is21,30,27,30,25sample size(n)=5

Q: On average, Americans have lived in 2 places by the time they are 18 years old. Is this average less…

A: Given Mean=2 x-bar=1.99 Standard deviations=0.3 n=62

Q: Regardless of age, about 20% of American adults participate in fitness activities at least twice a…

A: The provided information is  n=100x=15α=0.05The proportion is p^=xn=15100=0.15a.The null and…

Q: Assume that a sample is used to estimate a population mean μ. Find the margin of error M.E. that…

A: The question is about to find margin of error Given : Sample size ( n ) = 9 Sample mean ( x¯ ) =…

Q: A company produces steel rods. The lengths of the steel rods are normally distributed with a mean of…

A: Given Information: Mean μ=147.6 Standard deviation σ=0.8 Sample size n=11

Q: 3. x = 7 and = = 15 test the hypothesis that μ = 5. n 4. Would you result change using a different…

A: Solution Given that, 3.x bar = 7 , and s2/n=15 and µ = 5 4. would you result change using a…

Q: The Intelligence Quotient (IQ) test scores for adults are normally distributed with a population…

A: Solution-: Given: μ=100,σ=20,n=70 We want to find, P(the mean of sample less than 95)=?

Q: ngineering Data Analysis. No long explanation needed. Rate will be given! Multiple Choice The…

A: Solution-: Given: μ=485, σ=32 We want to find, P( a battery chosen in random will have 450 to 550)=?…

Q: Q4/ The average on a statistics test was 78 with a standard deviation of 8. If the test scores are…

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Q: The data set below contains penetration values​ (the percentage of a​ country's population who are​…

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Q: in a certain lottery, 5 different numbers between 1 and 34 inclusive are drawn. these are the…

A: There is total 34 numbers, from 1 to 34 inclusively.

Q: A group of randomly selected adults were asked if they are in favor of or against cloning. The…

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Q: The table below shows the number of one​ company's stores located in each of 50 regions. Complete…

A: Given, x x2 61 3721 21 441 79 6241 55 3025 569 323761 81 6561 67 4489 18 324 12…

Q: A normal distribution has a Mean of 25 and a S.D. of 10. Find the probability that the deviation…

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Q: There is a claim that playing e-sport increase food intake. The following table (Table 2) shows data…

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Q: According to the central limit theorem The distribution of the sample mean is normal if sample size…

A: Explanation: Central limit theorem: According to Central limit theorem, If population with mean μ,…

Q: To construct a confidence interval for the difference between two population means ₁-₂, use the…

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Q: A researcher wishes to estimate, with 95% confidence, the population proportion of adults who eat…

A: The objective is to estimate the sample size for the different estimated values of the sample…

Q: Find the values of the 60th, 70th, and 80th percentiles of a normal distribution for which Mean and…

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Q: The quality control officer thinks there is a problem with one of the machines that places the…

A: The given data indicates the volume of lotions in the bottles. The volume of lotion that should be…

Q: Use a t-test to test the claim about the population mean μ at the given level of significance x…

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Q: Q4/ The average on a statistics test was 78 with a standard deviation of 8. If the test scores are…

A: It is given that: μaverage score=78σstandard deviation of scores=8

Q: he time in seconds after it is thro .5 1 1.5 2 25 82.2 92.625 100.6 106 lator to do a quadratic…

A: t h(t)  0.5 69.325 1 82.2 1.5 92.625 2 100.6 2.5 106.125 3 109.2 lets consider…

Q: Part 4 of 4 Which is smaller? Explain why. The confidence is smaller since there is (Choose one) of…

A: Given that: Mean, μ=6.8 91% confidence interval of mean: 6.2&lt;μ&lt;7.4 95% confidence interval of…

Q: In a survey of 3466 adults, 1457 say they have started paying bills online in the last year.…

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