What percentage of the class has a test score between 68 and 82? Approximately how many students have a test score between 61 and 89? What is the probability that a student chosen at random has a test score between 54 and 75?

Q: Find the probability that a randomly selected high school student who took the reading portion of…

A:

Q: e number of milligrams (mg) of cholesterol in a cup of a certain brand of ice cream is 660 mg, the…

A: Given,   μ=660σ=35

Q: e monthly utility bills in a city are normally​ distributed, with a mean of ​$100   and a standard…

A: Given: Mean, μ=100 Standard deviation, σ=15 (a)  Probability that a randomly selected utility bill…

Q: For a normally distributed population with a mean of 35 and a standard deviation of 7.5, if a sample…

A: From the given information,   Mean  = 35 Standard deviation = 7.5   The objective is to find the…

Q: Given a test is normally distributed with a mean of 30 and a standard deviation of 6: What is the…

A: Let's assume X = score in the test.  As given X ~ N ( mean = 30 , standard deviation = 6)  It is…

Q: n a recent year, the ACT scores for high school students with a 3.50 to 4.00 grade point average…

A:

Q: In a recent​ year, the total scores for a certain standardized test were normally​ distributed, with…

A: Given that, Mean = 500 Standard deviation = 10.7

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

A: Let "X" be the final examination grades in an introductory statistics course. Find z-value: Note…

Q: In a recent study, the Centers for Disease Control and Prevention reported that the diastolic blood…

A: Given that, Mean, mu= 80.5 And standard deviation, sigma= 9.9 X~ N(80.5, 9.9) We know that, z score…

Q: In​ 2008, the per capita consumption of soft drinks in Country A was reported to be 19.11 gallons.…

A: GivenMean(μ)=19.11standard deviation(σ)=5

Q: The heights of 100 high school students are measured, with a mean of 175 cm and a standard deviation…

A:

Q: The Average teachers salary is $57,337. The distribution is normal with a standard deviation with…

A: Given, μ=57337σ=7500 Let X be the amount teacher makes per year. The required probability that a…

Q: The reading speed of second grade students is approximately normal, with a mean 83 WPM and a…

A: Given,   Mean = 83 Standard deviation = 11

Q: The marks on a statistics midterm test are normally distributed with a mean of 78 and a standard…

A:

Q: The golf scores for a school team were normally distributed with a mean of 72 and a standard…

A: The Z-score of a random variable X is defined as follows: Z = (X – µ)/σ. Here, µ and σ are the mean…

Q: A population has a mean of 200, a standard deviation of 30, and is normally distributed. A sample of…

A: We want to find the probability  Note: This probability value calculated from standard normal…

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

A:

Q: The weights of adult male rhesus monkeys are normally distributed with a mean of 15 pounds and a…

A: From the provided information, Mean (µ) = 15 pounds Standard deviation (σ) = 3 pounds Let X be a…

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: The cafeteria records that 67% of students buy pizza with a standard deviation of .03 If you took a…

A: Given: p=67% and σ=0.03. Now, if a sample of 100 is taken, then standard deviation of sample will…

Q: In​ 2008, the per capita consumption of soft drinks in Country A was reported to be 18.83 gallons.…

A: Let "X" be the per capita consumption of soft drinks in Country A . Refer Standard normal…

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

A: Given data, μ = 70 inches σ = 3 inches If n=16 P(X>6.1)=? =P(X>73)=?

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

A: We want find student score and probability

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

A: Given that, μ=2.63,σ=0.03,n=9 The mean of sampling distribution of sample mean is, (a) The standard…

Q: An electrical company claims that an average life of bulbs it manufactures is 1200 hours with a…

A: Given that : μ= 1200 hour  ? = 250 hours  n = 100 By using the central limit theorem we solve this…

Q: A manufacturer knows that their items have a normally distributed length, with a mean of 13 inches,…

A:

Q: A sample of university students has an average GPA of 2.78 with a standard deviation of 0.45. If GPA…

A: Let X be a continuous random variable of average GPA of university students is normally​ distributed…

Q: A sample of university students has an average GPA of 2.78 with a standard deviation of 0.45. If GPA…

A: Let X be a continuous random variable of average GPA of university students is normally​ distributed…

Q: The average resident of Metro City produces 770 pounds of solid waste each year, and the standard…

A: We have to find probability

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

A:

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: The probability is 5​% that a student taking the test scores higher than

A: Let X denote the scores of final examination in an introductory statistics course. Given that X…

Q: The weights of newborn for hippopotami is approximately Normal, with a mean of 85 pounds and a…

A: Given  Mean, μ=85 pounds and standard deviation, σ=12 pounds

Q: On a mathematics test in a high school, scores are normally distributed with a mean of 77 and a…

A: Given that.   X~N( μ , ?^2 )   μ=77     , ?=16.8   Z-score =( x - μ )/?

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: The final score for a mathematics exam is normally distributed, with an average score (µ) of 57 and…

A: GivenMean(μ)=57standard deviation(σ)=9.25

Q: The monthly In distributed, with mean of $100 standard deviation of $13. Find the probability that a…

A:

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

A: Given data,μ=22.9σ=6.7P(X<18)=?

Q: The time needed to complete a final examination in a particular college course is normally…

A:

Q: A biologist found the wingspans of a group of monarch butterflies to be normally distributed with a…

A:

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

A:

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

A: Here, µ = 72, σ = 9.

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: he weights of truffles follow a normal distribution, with a mean weight of 347 grams and a standard…

A: Here it is given that - Mean (μ) = 347 Standard deviation (δ) = 15.3 Let X be the weight of truffles…

Q: The number of cars crossing the Pigeon River border crossing each day is known to be normally…

A: GivenMean(μ)=2500standard deviation(σ)=600

Q: are normally​ distributed, with a mean of $100 and a standard deviation of ​$13. Find the…

A: Given: μ=100, σ=13 The corresponding z-values needed to be computed are: The probability that a…

Q: The time required to complete a final examination in a particular forestry subject is normally…

A: Solution: Let X be the time required to complete a final examination in a particular forestry…

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

A:

Q: For a normally distributed population with a mean of 35 and a standard deviation of 7.5, if a sample…

A: Given dataMean = 35Standard deviation = 7.5Sample size (n) = 40probability that the sample mean will…

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