A waitress keeps track of the tips she earns and knows that her mean tip is 15% with a standard deviation of 4%. Suppose that she uses this information to create a sampling distribution with samples of size 50 What is the probability that a sample of tips will have a mean between 14% and 15.5%?

Q: A manufacturer knows that their items have a lengths that are skewed right, with a mean of 5 inches,…

A: μ=mean=5 , Standard deviation=σ=1.4  n=44 Z-score=Z=(x̅-μ)/(σ/√n) If the sample size is greater than…

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Q: Suppose the grades in a mathematics class are Normally distributed with a mean of 75 and a standard…

A: Introduction :-  Here the grades in a mathematics class are Normally distributed with a mean of 75…

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A: Given information Mean Diameter(µ) = 202 inches Standard deviation(σ) = 1.3 No of samples (n) = 70

Q: The random variable X represents the average number of texts a teenager sends, where the…

A: Given, μ = 450σ = 150To find,P (X > 700) = ?

Q: Suppose the annual consumption of chicken mean is 20.84 pounds per person, and that thestandard…

A: From the given information,Population mean = 20.84 pounds,Standard deviation = 9.193 pounds,And…

Q: The test scores are normally distributed with a mean of 78 and a standard deviation of 9. If 39…

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Q: According to the Bureau of Labor Statistics, the average number of weeks an individual is unemployed…

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Q: The distribution of the number of viewers for the American idol television show follows a normal…

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Q: The entrance test scores for SHS in a certain school has a mean of 85 and a standard deviation of…

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Q: The heights of 18 year-old men are approximately normally distributed, with a mean 68 inches and a…

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Q: If the grades on a statistics test are normally distributed with a mean of 80 and a standard…

A: Introduction: Define X as the grade of a randomly selected student. It is given that X has a normal…

Q: A large normally distributed population has a mean of 502 and a standard deviation of 25. If the…

A: Given,sample size(n)=36mean(μ)=502standard deviation(σ)=25

Q: The distribution of heights for women in the United States is approximately normal, with a mean of μ…

A: Where,

Q: The average hourly wage for manufacturing workers in the United States is $20.89 per hour, With a…

A: Give that  The hourly wage for manufacturing workers in united states is $20.89 μ = 20.89 Standard…

Q: Suppose the university residence records displays that the mean payment for residence is µ=R7500 per…

A: We have given that  X~N(mu,sigma ^2) mu=7500,sigma =1800 ,n=30 Z-socre =(x-mu)/sigma

Q: Proctor & Gamble reported that an American family of four washes an average of 1 ton (2000…

A: Introduction:Here, the suggested population mean, μ = 2,000 pounds.The population standard…

Q: Suppose a survey finds that the mean monthly rent of a two-bedroom apartment in seattle is $560,…

A: Given Information:Mean, μ=$560Standard Deviation, σ=$35

Q: A professor at a university gives her large class an examination and finds that the scores follow…

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Q: The grades of a statistics midterm are normally distributed with a mean of 79 and a standard…

A: Normal distributionμ=79σ=3.5pgrade between74 and 80=?

Q: In a certain distribution of numbers, the mean is 40 with a standard deviation of 5. Atleast what…

A: Given data: Mean = 40 standard deviation = 5. To find: Atleast what fraction of the numbers are…

Q: A forester studying the effects of fertilization on certain pine forests in the Southeast is…

A: Probability : Probability is a field of mathematics that deals with numerical descriptions of how…

Q: The distribution of the number of hours people spend at work per day is unimodal and symmetric with…

A: Solution-: Given: μ=8hours,σ=0.7hours We find, (a) If Saba’s z-score for his work hours was −1.3 ,…

Q: Suppose the heights of students in a class follows normal distribution. The mean is 60 inches and…

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Q: A set of final examination grades in an introductory statistics course is normally​ distributed,…

A: Let "X" be the grades of final examination. Use excel formula "=NORM.S.DIST(1.5714, TRUE)" to…

Q: A manufacturer knows that their items have a normally distributed length, with a mean of 11 inches,…

A: Given :  sample mean = 11             standard deviation of samples=1.722=0.3624412178…

Q: Alex wants to find out: if the standard deviation of the mean for the sampling distribution of…

A: Solution: given standard deviations of sample s1=9. fir sample size n1=256  Then what will be the…

Q: The diameter of a brand of tennis balls is approximately normally distributed, with a mean of 2.63…

A: Note: Please repost remaining subparts as i can answer only 3 subparts as per my policy Given data,…

Q: A manufacturer knows that their items have a lengths that are skewed right, with a mean of 11…

A: Mean = 11 Standard deviation = 2.9 Sample size = 36

Q: The distribution of the number of viewers for the American Idol television show follows a normal…

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Q: Suppose the heights of students in a class follows normal distribution. The mean is 60inches and the…

A: Calculate the corresponding Z score as follows: The probability that the data point observed is at…

Q: According to the U.S. Energy Administration, the mean monthly household electric bill in the United…

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

Q: Suppose that the average number of hurricanes is 32 per year with a standard deviation of 2.8 and…

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Q: A politician takes an SRS of 75 citizens in a county to see what proportion of citizens sampled are…

A: A politician takes an SRS of 75 citizens in a county to see what proportion of with their standard…

Q: The AAA reports that the average time it takes to respond to an emergency call is 25 minutes. Assume…

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Q: According to the US energy administration, the mean monthly household electric bill in the united…

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Q: The final exam scores in a Mathematics class were normally distributed with a mean of 75 and a…

A: As per our guidelines we are suppose to answer only one question. Given,mean(μ)=75standard…

Q: According to a study done by De Anza students, the height for Asian adult males is normally…

A: Given Data Population Mean,μ = 66.0 Population Standard Deviation,σ = 2.5

Q: Suppose the mean income of firms in the industry for a year is 25 million dollars with a standard…

A: We have to find given probability.

Q: The president of a college wants to determine the mean number of units that college students take…

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Q: What percentage of the class has a test score between 68 and 82? Approximately how many students…

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

Q: In a normal distribution, it is known that 27.34% of all the items are included from 100 up to the…

A: X~N(μ,σ2)Then,Z=X-μσ~N(0,1)Given, P[100<X<μ]=0.2734and,…

Q: Suppose that SAT scores among U.S. college students are normally distributed with a mean of 500 and…

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Q: A waiter believes the distribution of his tips has a model that is slightly skewed to the right,…

A: A waiter believes the distribution of his tips has a model that is slightly skewed to the right,with…

Q: a distribution with a mean of 100 and a standard deviation of 15, what is the probability that a…

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Q: Find the indicated probability. An insurance company has determined that the cost of a certain…

A: Given information Mean µ = $800 Standard deviation σ = $40

Q: A manufacturer knows that their items have a lengths that are skewed right, with a mean of 5 inches,…

A: Given: Population mean = 5 inches Population standard deviation = 0.7 inches Sample size = 37 To…