w a Box Plot and identify outliers (if any): -1, -11.7, -19, 20, 21, 30, 5, 7, 9.7, 13

Q: An environmentalist wants to find out the fraction of oil tankers that have spills each month. Step…

A: A sample of 549 tankers is drawn of which 98 had spills.

Q: According to survey data, the distribution of arm spans for females is approximately Normal with a…

A: Mean (µ) = 65.3Standard deviation (σ) = 3.4The distribution of arm spans for females is…

Q: he manager of a computer retail store is concerned that his suppliers have been giving him laptop…

A: Let denotes the mean replacement time which follows normal distribution. The mean is 3.6 years,…

Q: Returns on stocks X and Y are listed below: Period Stock X Stock Y 1 2 3 4 5 9% 6% 1% 8% -1% -2% 9%…

A: The returns on stocks  and  are listed below: Stock X9%6%1%8%-1%3%10%Stock Y-2%9%5%12%-1%6%5%Sample…

Q: Let z be a standard normal random variable with mean = 0 and standard deviation 1. Use Table 3 in…

A: Z be a standard normal random variable with mean μ = 0 and standard deviation σ = 1

Q: The following data set shows the heights in inches for the boys in a class of 40 students. 66; 66:…

A: A box plot helps in understanding the distribution of the data

Q: A random variable is normally distributed with a mean of μ50 and a standard deviation of a = 5. a.…

A: The formula of the Z-score is,Where,X denotes the raw data point,µ denotes the population mean,σ…

Q: A researcher is examining offender recidivism nationwide. The researcher has obtained data from the…

A:

Q: If the mean of the raw score distribution is changed to score, it would equal ____. a) the…

A: A raw score distribution is a presentation of all observed scores in a given dataset without any…

Q: The commute distances (in kilometers) at a huge corporation vary from employee to employee. It is…

A: The considered number of employees is 47.The sample mean is 23.41.The sample standard deviation is…

Q: For each of the following residual plots against the predicted value, state which assumptions, if…

A: It is required to identify the assumptions of a normal error simple linear regression model that are…

Q: The following is data from persons who recidivated. The researcher wants to know if indi data in the…

A: p1^=0.33,p2^=0.38,N1=150,N2=110,α=5

Q: In a recent year, the scores for the reading portion of a test were normally distributed, with a…

A: Let X be the score for the reading portion of the test.

Q: Find the minimum sample size required to estimate the mean pulse rate of adult females in  order to…

A: confidence level=90%Margin of error(E)=4standard deviation()=8.5

Q: 6.33 The Florida Game and Freshwater Fish Commission is interested in estimating weights of…

A: Since you have posted a question with multiple sub-parts, we will solve first three sub-parts for…

Q: Using the image answer the following. Find the probability that a randomly selected hoysehold in…

A: Mean()=138standard deviation()=46

Q: Given the following confidence interval for a population mean, compute the sample mean, x‾�‾.…

A: Confidence interval ( 12.08 <  < 12.72) LCL=12.08UCL=12.72

Q: You are a data analyst for a health insurance company and want to estimate the population mean of…

A: The number of patients is 32.

Q: If x is a binomial random variable, calculate , , and for each of the following values of n and p.…

A: x is Binomial random variablex~Binomial(n,p)P(X=x)=

Q: 18. A random sample of 40 college professors is selected from all professors at a university. The…

A: A random sample of 40 college professors is given ( their ages )to construct a stem and leaf plot.

Q: K ces (a) A poll of 2,256 likely voters was conducted on the president's performance. Approximately…

A: Sample size(n) = 2256p = 0.50Confidence interval(c) = 0.96

Q: 2.7-10. The mean of a Poisson random variable X is μ = 9. Compute P(μ – 2o < Χ < μ + 26).

A: The mean of a Poisson random variable X is .The objective is to compute

Q: Find the probability that the full height of a randomly selected tree is less than 166.9 feet.

A: Let x represent the full height of certain species of tree. Assume that x is normally distributed…

Q: A fair coin is flipped 400 times. Find the exact probability that the coin will land heads exactly…

A: The number of times the coin is flipped, It is a fair coin. So, the probability of success,

Q: Hurricanes Katrina and Rita caused the flooding of large parts of New Orleans, leaving behind large…

A:

Q: You estimate the following model: excess returnt= a +ßexcess return on the markett + €t where excess…

A: The simple linear regression model is given asexcess returnt=α+β excess return on the markett+ϵtThe…

Q: The volumes of soda in quart soda bottles are normally distributed with a mean of 32.3 oz and a…

A: The volumes of soda in quart soda bottles are normally distributed with a mean of 32.3 oz and a…

Q: A Bayesian network is represented in the graph below with each variable to be binary. There are 8…

A: The graph represents a Bayesian network with each variable to be binary.There are 8 observations.

Q: You measure 45 randomly selected textbooks' weights, and find they have a mean weight of 62 ounces.…

A: Let the variable X denote the textbook's weights.The value of x̅ is 62, n is 45, and σ is 3.8.

Q: what is the probability of getting 0 defective calculators

A: Number of defective calculators = 13Number of non defective calculators = 39Total number of…

Q: A data set includes data from student evaluations of courses. The summary statistics are n=95, x=…

A: From the provided information,

Q: A manufacturer knows that their items have a normally distributed lifespan, with a mean of 3.4…

A: According to the given information, the lifespan of items is normally distributed with mean 3.4…

Q: 40 men participating in a study reported how angry they felt at the end of each day for 2 weeks. For…

A: A variable is a characteristic that is being measured.

Q: researcher was hired to estimate the proportion of American households that have broadband internet…

A: following 95% confidence interval.0.461&lt;p&lt;0.541We have to find sample size

Q: Question 4 Nintendo collected data on the heights of a sample of Animal Crossing: New Horizons…

A: The histogram depicts the heights of a sample of Animal crossing.

Q: Supplier claims that they are 95% confident that their products will be in the interval of 20.45 to…

A: Confidence interval of Supplier claims = 20.45 to 21.05The calculated confidence interval of the…

Q: In a recent study on world happiness, participants were asked to evaluate their current lives on a…

A: For the distribution of the measured response on a scale of 0 to 10, it is given that,The mean…

Q: Let z be a standard normal random variable with mean 0 and standard deviation a 1. Use Table 3 in…

A: Z be the standard normal distribution. Mean=0, variance=1

Q: Periodically, the county Water Department tests the drinking water of homeowners for contaminants…

A: We have found that the lead and copper levels in water specimens collected in 1986 for a sample of…

Q: A machine can be in one of four states: 'running smoothly' (state 1), 'running but needs adjustment'…

A: Given that  to be the state of the machine on the morning of day  for .

Q: The XO Group Inc. conducted a 2015 survey of 13,000 brides and grooms married in the United States…

A: From the provided information,

Q: alf the staff at Honeydukes argue that all their candy is liked equally by all customers. The other…

A: The population of interest here are all the customers of Honeydukes.To test:Null hypothesis: All the…

Q: (a) the test statistic (b) the critical z score

A: Let p be the population proportion.Given that,Population proportion Favorable no. of outcomes Sample…

Q: What would the 95% confidence limits for a sample that included 325 individuals with a mean of 8 and…

A: It is given that Sample mean = 8Sample std. deviation = 0.63Sample size = 325Confidence level = 95%

Q: In a recent study on world happiness, participants were asked to evaluate their current lives on a…

A: The mean is 6.1 and the standard deviation is 2.4.

Q: A graduate assistant is analyzing whether anxiety is detrimental or enhances one's test taking. To…

A: The given data is No AnxietyAnxietyIndividual 12314Individual 2 1911Individual 3 2110Individual…

Q: A health psychologist was interested in women's workout preferences. Of the 56 participants…

A: The population of interest is the women who workout.To test:Null hypothesis: There is no difference…

Q: Assume the random variable x is normally distributed with mean μ = 50 and standard deviation o=7.…

A:

Q: A marketing researcher is hired by a corporation to conduct a study and estimate the population mean…

A: It is required to determine whether the researcher has sufficient funds to conduct the study.

Q: An article in the Washington Post on March 16, 1993 stated that nearly 45 percent of all Americans…

A: The null and alternative hypothesisH0:p=0.45Ha:p0.45sample size(n)=80x=30sample proportion()=