The average age of our class is 22.3 years.  The standard deviation is 4.7 years.  If the variable is normally distributed:Find the probability a student is between 20 and 30 years old.

Q: A senior high student commutes daily from home to school. The average time for one way. trip is 20…

A:

Q: Suppose that the walking step lengths of males are normally distributed with a mean of 2.5 feet and…

A: We have to find given probability.

Q: According to Money magazine, Maryland had the highest median annual household income of any state in…

A:

Q: The distribution of the IQ (Intelligence Quotient) is approximately normal in shape with a mean of…

A: Given information: μ=100σ=15 Standard deviation rule: 68% of the data lies between μ-σ,μ+σ95% of the…

Q: It takes an average of 6 weeks to grow lettuce in a hydroponics system. The time it takes to... grow…

A: Normal distribution probability calculation

Q: An insurance salesperson sells an average of 4.90 policies per day. Let x denote the number of…

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Q: Provide an appropriate response. Use the Standard Normal Table to find the probability. IQ test…

A: Solution : Mean, μ = 100 Standard deviation, σ = 15 z score corresponding to the value of IQ score,…

Q: IQ is normally distributed with a mean of 100 and a standard deviation of 15. Suppose one individual…

A: let X: IQ X~N(μ,σ)where, mean(μ)=100    and standard deviation(σ)=15

Q: The average life of a smartphone is 7 years with a standard deviation of 1 year. Assuming that the…

A: Let X denotes the life of smartphones. Given that X follows approximately N(μ=7,σ2=12). The sample…

Q: Part D please

A: Here X has normal distribution with mean of 75847 and standard deviation of 33800 We have to find…

Q: Renee scores an average of 159 points in a game of bowling, and the points are normally distributed.…

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Q: Deer hunters score the antlers of their quarry in order to compare the most spectacular specimens.…

A:

Q: Michael Jordan averaged 30 points per game in his career with standard deviation of 2 points per…

A:

Q: The lengths of pregnancies are normally distributed with a mean of 269 days and a standard deviation…

A: We have to find given probability.

Q: the length of time it takes college students to find a parking spot follows a normal distribution…

A: Given, μ=5 minutesσ=1 minutes

Q: Lisa has collected data to find that the number of pages per book on a book shelf has a normal…

A: The empirical rule states that 68% of the data lies within one standard deviation from the mean and…

Q: The life of light bulbs is distributed normally. The standard deviation of the lifetime is 36 hours…

A: Answer: From the given data, mean(μ) = 500 standard deviation (σ) = 36 X~ Norma(500,36) at most 508…

Q: e z scores to compare the given values. recent awards ceremony, the age of the win the standard…

A: Actor=X , Actress=Y X=35  ,  Mean=47.6 , Standard deviation=6.7 Y=48  , Mean=35.6 , Standard…

Q: Tires that wear out bynothing miles will be replaced free of charge.

A: Solution:

Q: A bank's loan officer rates applicants for credit. The ratings are normally distributed with a mean…

A:

Q: The Orchard Cafe has found that about 14% of the diners who make reservations don't show up. If 82…

A: Given,Sample,size,,The probability of success on a trial,,Using formula ( Binomial…

Q: Private nonprofit four-year colleges charge, on average, $27,363 per year in tuition and fees. The…

A: Given information: μ=27363σ=6865 b) The probability that a randomly selected Private nonprofit…

Q: SAT test scores are normally distributed with a mean of 500 and a standard deviation of 100. Find…

A: Given: Let X be the SAT test scores Mean(X)=500 SD(X)=100   X~ Normal(500, 1002)

Q: Lisa has collected data to find that the number of pages per book on a book shelf has a normal…

A: Solution: Let X be the number of pages per book on a book shelf. From the given information, X…

Q: Cattle are often fattened in a feedlot before being shipped to a slaughterhouse. Suppose the weight…

A: It is given that the weight gain is normally distributed with average of 1.75 pounds per day and a…

Q: Scores on a math test are normally distributed with a mean of 76 and a standard deviation of 6. Part…

A: Let, X=the scores on a math test Given that X follows a normal distribution with mean=76 and…

Q: On average, indoor cats live to 12 years old with a standard deviation of 2.4 years. Suppose that…

A:

Q: On average, indoor cats live to 14 years old with a standard deviation of 2.5 years. Suppose that…

A: Obtain the probability that an indoor cat dies when it is between 12.1 and 15.3 years old.  The…

Q: Scores on a test are normally distributed with a mean of 78 and a standard deviation of 6. A student…

A: Given: Mean μ=78 Standard deviation σ=6 A student is selected at random.

Q: Norman is a student at a college in Durban. The amount of time, in minutes, that Norman walks to the…

A: Given: Amount of time = X X is uniformly Distributed in [ 15 , 40]

Q: 1. The scores on a national achievement exam are normally distributed with a mean of 500 and a…

A:

Q: tion of 1.4. In 2014, it is estimated that 8.5% of people aroun g questions: whether the…

A: *Answer:

Q: The J8B Card Shop sels calendars featuring a different colonial picture for each month. The…

A: Given that the September to July demand for the calendars follows normal distribution with mean of…

Q: The WAIS is an IQ test. Scores on the WAIS for the 20-34 age group are normally distributed with a…

A: It is given that the mean and standard deviation for the age group of 60-64 is 90 and standard…

Q: Mary drives to work each morning, and the trip takes an average of µ = 38 minutes. The distribution…

A: Given: µ = 38 minutes,  σ = 5 minutes. The Z follows standard normal distribution. Z=X-μσ

Q: The Orchard Cafe has found that about 7% of the diners who make reservations don't show up. If 84…

A: 7% of diners who make reservations don't show up; p=0.07 84 reservations have been made; n=84

Q: IQ scores are normally distributed with a mean of 100 and a standard deviation of 15. What is the…

A: We have to find out given probability..

Q: MCAT scores are normally distributed with an average score of 500.5 and a standard deviation of…

A: Given Information:Mean, μ=500.5Standard Deviation, σ=10.5To find out the probabilty of getting a…

Q: Trucks in a delivery fleet travel a mean of 100 miles per day with a standard deviation of 38 miles…

A:

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.