You wish to study whether or not a roofer should wear ear protection when using a particular nail gun. A nail gun is tested n = 36 times yielding a mean noise level of 68 dB with standard deviation of 8 dB. Construct a 99% confidence interval for the population mean. 64.4 u <71.6 dB at 99% 60.0 < l <76.0 dB at 99%. 65.3 l <70.7 dB at 99% 64.6 < u <71.4 dB at 99%

Q: Calculate the value of mode from the following data: Marks : 10 15 20 25 30 35 40 Frequency 8 12 36 ...

A: The frequency of observation  is maximum is called mode

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A: Different ways can  5 out of 8 different shirts, 4 out of 10 different pieces of slacks, and 3 out o...

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Q: lustration 11.6. Calculate coefficient of skowness from the data as follows.

A:

Q: To estimate the average salary of policemen, 64 of them were taken as samples. If the mean salary of...

A: Solution

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A:

Q: Two types of smudge pots were tested for use to protect orchards from frost. A grapefruit grower wan...

A: Given Xbar 1=602.5 S1=26.99 N1=10 Xbar2=671.2 S2=42.06 N2=10

Q: The mean and the standard deviation of one sample are respectively 54.4 and 8; the mean and the stan...

A:

Q: The number of workers in a large factory in 2000 was 540 of which 30% were female and the rest males...

A:

Q: Sociologists say that 85% of married women claim that their husband's mother is the biggest bone of ...

A: Given that  n=6 , p=85%=0.85 , q=1-p=1-0.85=0.15 X~Binomial(n=6,p=0.85)

Q: The table shows the score obtained by applicants for secretarial position in a certain manufacturing...

A: Solution-: Scores=Class intervals  We have following table: Class Interval Frequency (fi) 10--1...

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A: Given that, Almost all suspension bridges are designed to transfer the load to the suspension cables...

Q: A sample of 12 measurements of the lifetimes of flashlight torch gave a mean life of 7.38 years and ...

A:

Q: Calculate Mean, Median, Mode for the following data sets? -5, 6, -7, 6, -5, 11

A: Data given  5, 6, -7, 6, -5, 11

Q: Calculate correlation coefficient from the following data : N= 10 , Σ X= 140 , Σ Υ-150 Σ (X-10)=180,...

A:

Q: The average McDonald's restaurant generates $2.3 million in sales each year with a standard deviatio...

A:   Here, population standard deviation is known, so we can perform a z-test .    

Q: A consumer advocacy group suspects that a local supermarket's 7-ounce packages of cheddar cheese act...

A:

Q: Find the minimum sufficient statistic in the following situations. In order to establish minimality,...

A:

Q: Based on a​ poll, among adults who regret getting​ tattoos, 12​% say that they were too young when t...

A: We have given that  Probability of success p=0.12 Number of trials n=9 X~binomial ( n,p)  

Q: Suppose that a researcher had estimated the first 5 autocorrelation and partial autocorrelation coef...

A: Given the first 5 autocorrelation coefficients of series in order as -0.674, 0.332, -0.072, 0.042, 0...

Q: The size of the first sample is 50 and that of the second is 100. Find the mean and standard deviati...

A: Here given The mean and the standard deviation of one sample are respectively 54.4 and 8; the mean a...

Q: Explain in simple words the difference between the Causal and Correlated metric types.

A: causations and correlation (connections) can exist simultaneously, relationship doesn't infer causat...

Q: The following are the prices of commodities in 2016 and 2017. Calculate a price index based on price...

A: Given that 

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A: Assume that μ is the true average amount of fat in chicken fajita.

Q: The article referenced says that when women aged 25-34 binge drink they have on average 6.7 drinks. ...

A:

Q: (X), E(Y ) EXY), Cov(X, Y) , σχ, σχ and Py.

A:

Q: A shelf has 6 Java books and 4 python books. what is the probability that three particular Java book...

A:

Q: The Center for Disease Control reports that from 1999 - 2011 in the United States the number of deat...

A: Given natural cold has an average of 1231 deaths per year with a standard deviation of 140 deaths. F...

Q: Consider a tournament between N teams, each team playing each of the other teams. 1) How many games ...

A: 1)  Given information: A tournament between  teams, each team playing each of the other teams.

Q: A recent poll of 900 of your fellow students indicates that 38% would vote for you as "most likely t...

A: Given n=900 Alpha=0.05

Q: A reality show is considering three cities for their new season: Paris (P), Chicago (C), or Dallas (...

A: Given data  A reality show is considering three cities for their new season: Paris (P), Chicago (C),...

Q: Calculate Quartile Deviation and its Coefficient from the following data : Weight (in pounds) 120 12...

A:

Q: 3. A survey of 10 fast-food restaurants noted the number of calories in a mid-sized hamburger. The r...

A:

Q: In conclusion, state the relationship between the mass of the spherical object and the distances the...

A: Keeping the distance relative to the ramp constant, it is observed that the knockback distance of ca...

Q: Five sisters named Taylor, Selena, Gigi, Kendall, and Zendaya were born in 1989, 1992, 2003, 2006, a...

A: Five sisters named Taylor, Selena, Gigi, Kendall, and Zendaya were born in 1989, 1992, 2003, 2006, a...

Q: Suppose X is a Binomial random variable with n = 15 and p = 0.70. Use Table I in Appendix B (page 81...

A:

Q: The mean lifetime of solar lamps produced by JBC Company have a mean 1800 hours and standard deviati...

A: Solution-: Given: μ0=1800hours,σ=100hours,x¯=1850hours,n=50,α=0.01 Claim: The lifetime of the lamps ...

Q: CNNBC recently reported that the mean annual cost of auto insurance is 1043 dollars. Assume the stan...

A:

Q: Please solve all questions and parts and show the work and if it has an R function can you please pr...

A: Comment: As per the our company guidelines we are supposed to answer only one question. Kindly repos...

Q: Given a normal distribution with u = 30 and o = 6, find the normal curve area to the left of x = 22....

A:

Q: SV df MS Fc Treatments 5 59.45 11.89 49.54** Control vs treated 17.97 17.97 74.88** Complete vs orga...

A: Given Information: The summary output of ANOVA with group comparisons is given.

Q: A researcher wishes to​ estimate, with 90​% ​confidence, the population proportion of adults who eat...

A: GivenMargin of error(E)=0.05confidence level = 90%

Q: Miss America winners from the 1920's and 1930's had a average BMI of 19.4. A sample of recent winner...

A: Given data Miss America winners from 1920's and 1930's had an average BMI of 19.4 The reported BMI v...

Q: Suppose that the plurality with elimination method is used on the following preference table. If the...

A: at first rewrite the table.......

Q: Estimate the production for the years 2008 and 2010 with the help of the following table : Year Prod...

A:

Q: A school is interested in whether a personal appeal to parents will influence the money they give to...

A: Givensample size(n)=100Mean(x)=27.50 dollarsstandard deviation(s)=40 cents = 0.40 dollarsα=0.01

Q: A telephone service representative believes that the proportion of customers completely satisfied wi...

A:

Q: 891, 937, 959, 1017, 1047, 1097, 1169, 1173, 1184, 1235, 1266, 1345, 1353, 1357, 1391, 1414, 1453, 1...

A: Frequency distribution table : A distribution table could be a graphic that presents values and ther...

Q: How many soldiers should Haley sample?

A: It is given that Proportion = 79% = 0.79 Margin of error E = 0.005 Confidence level = 93% The critic...

Q: :- 300 people of German and French nationalities were interviewed for finding their preference for m...

A: