If the standard deviation is 9 thousand​ miles, the proportion of trucks that can be expected to travel between 67 and 80 thousand miles in a year is _

Q: B. The weights of crates of apples are normally distributed with a mean of 26.4 pounds and a…

A: Given: Population mean μ=26.4 Population standard deviation σ=3.1 Raw score (X) = 31.6

Q: The heights of adult men in America are normally distributed, with a mean of 69.5 inches and a…

A: Let X be the height of adult men  Y be the height of adult women  X~N(μx=69.5inch, σx=2.62 inch)…

Q: For earthquakes with a magnitude 7.5 or greater on the Richter scale, the time between successive…

A: Note- As per our policy we can answer only the 1st question. If you want solutions for other…

Q: he lengths of pregnancies in a small rural village are normally distributed with a mean of 270 days…

A:

Q: The heights of adult men in America are normally distributedwith mean of 69.3 inches and a standard…

A: Norma distribution is a continuous probability distribution. Standard normal distribution or…

Q: Show your handwritten work on the paper. The heights of adult men in America are normally…

A: Given : The heights of adult men in America are normally distributed with 69.3 inches and a standard…

Q: If Elson's z-score on post-assessment is -3, the mean is 10 and the standard deviation is 2, what…

A: As per guidelines expert have to answer first question only dear student please upload other…

Q: In a test of a lifelong brand of tires, a survey revealed that the mean life was 35,000 miles and…

A: Solution: 1. Let X be the lifelong brand of tires. From the given information, X follows normal…

Q: could you answer 4,5&6 please

A: Standard normal distribution: The standard normal distribution is a special case of the normal…

Q: In Betropolis the mean selling price of houses last year was $200,000 and the standard deviation was…

A:

Q: 9. The mean July daily rainfall in Waterville is 10 mm and the standard deviation is 1.5 mm. Assume…

A: Consider a random variable X which represent that amount of daily rainfall in Waterville in the…

Q: 1. In the past, a chemical company produced 880 pounds of a certain type of plastic per day. Now,…

A: Given that  Sample size n =50 Population mean μ =880 Sample mean =871 Standard deviation =21

Q: 19. According to a recent report, the average American consumes 22.7 teaspoons of sugar each day…

A:

Q: In a medical mission among adults, the distribution of cholesterol readings, in mg/dl is normally…

A:

Q: Brewed decaffeinated coffee contains some caffeine. We want to estimate the amount of caffeine in 8…

A:

Q: The amount of money raised by Clayton State teams for the Statistics Games is normally distributed,…

A: Given,mean(μ)=$360standard deviation(σ)=$15and data value(X)=$396

Q: The result of the previous licensure examination for teachers shows that the average score of exam…

A: Given: X=Score of exam takers in the general education section Mean μ=97 Standard deviation σ=5.1…

Q: The monthly income of 5,000 workers at the Microsoft plant are distributed normally. Suppose the…

A:

Q: 21. Sophia got a 95% on her Statistics mid-term and a 91% on her Calculus mid-term. The grades on…

A: Given: Sophia's mark in Statistics test is 95% Mean grade of the statistics test is 87% and its…

Q: The average birthweight of newborns at a local hospital have a normal distribution with a mean of…

A:

Q: A pediatrician obtains the heights of her 200 three-year-old female patients. The heights are…

A: GivenMean(μ)=38.72standard deviation(σ)=3.17

Q: a. Find the mean and standard deviation. b. What percentage of the data is within 2 standard…

A: A medical laboratory tested 8 samples of human blood for acidity on the pH​ scale, (xi)

Q: The mean for the entire population of depressed people is 33.13 with a standard deviation of 5. If…

A: Hi! Thank you for the question, As per the honor code, we are allowed to answer three sub-parts at a…

Q: In one town, the number of pounds of leafy greens consumed per person per year has a mean of 10…

A: (1) Standardized z-score:   The standardized z-score represents the number of standard deviations…

Q: The mean weight of a group of boys is 145 lb, with a standard deviation of 4 lb. If the weights are…

A: Given: Let X be a random variable follow normal distribution. X~N(μ, σ) Where, Mean weight μ = 145…

Q: The combined SAT scores for the students at a local high school are normally distributed with a mean…

A: Given : The combined SAT scores for the students at a local high school are normally distributed…

Q: 4. The mean for the entire population of depressed people is 33.13 with a standard deviation of 5.…

A: We have given that the distribution of all depressed people is normally distributed with mean 33.13…

Q: If you were to draw samples of size 59 from this population, in what range would you expect to find…

A: Given data:     The given mean value is: μ=261 days. The standard deviation is: σ=16 days. The given…

Q: 3. The average birthweight of babies tends to be about 3.5 kg and has a standard deviation of 0.5…

A: Given,   Mean = 3.5 standard deviation = 0.5   The objective is to find the required proportions.…

Q: Suppose the weights of 3-month-old babies are normally distributed-baby boys with a mean of 14.4…

A: For baby girls, μ=12.8σ=1.7

Q: 3. The heart rate for a group of patients at a local hospital is normally distributed with a mean of…

A: Given that mu = 97,s.d=18

Q: Suppose that the distribution of scores on an exam can be described by a normal curve with mean 110.…

A: Let X be the score in the exam. Given, X~Nμ=110,σ2. 90 is the 16th percentile. Thus…

Q: 21. The mean of the data for the resting heart rate of adults is 70 beats per minute, and the…

A: Hi! Thank you for the question, As per the honor code, we are allowed to answer one question at a…

Q: The scores of students on a college entrance exam were normally distributed with a mean of 18.3 and…

A: Given: μ=18.3σ=6.5Sample size, n=57

Q: Engineers must consider the breadths of male heads when designing helmets. The company researchers…

A: Determine the range that would be expected to find the middle 98% of most head breadths. The range…

Q: Q.3 Assume that the heights of men are normally distributed with a standard deviation of 2.5 inches.…

A:

Q: A-  For a population with μ = 150, a raw score of X = 125 corresponds to z = -2.00. What is the…

A: A)GivenMean(μ)=150raw score(X)=125z-score(z)=-2.00

Q: The scores for an intelligence test are normally distributed with a mean of 102 and a standard…

A: Obtain the minimum test score necessary to place someone in the upper 9​% of the​ population. The…

Q: The lengths of pregnancies in a small rural village are normally distributed with a mean of 261 days…

A: The range would you expect to find the middle 95% of most pregnancies is,Step-by-step procedure to…

Q: what percent of the height is: a. greater than 135 cm? b. less than 128 cm? c. between 115 and 130…

A: Let X be height of the students in Grade 1 section Newton Given, Heights~Normal (μ,σ2) μ=125σ=3.5

Q: There are 10 employees in a particular division of a company. Their salaries have a mean of $70,000,…

A: The value of the mean after the change is  $160,000

Q: Scores on the Wechsler Adult Intelligence Scale for the 2020 to 3434 age group are approximately…

A:

Q: A high school student spends an average of 6 hours (#=6) on their phone a day with a standard…

A:

Q: A doctor measured serum HDL levels in her patients, and found that they were normally distributed…

A: Given mean= 63.3  And standard deviation = 3.9  a)

Q: 2. In medical mission among adults, the distribution of cholesterol readings, in mg/dl is normally…

A: Given that mu =210 ,sigma =12

Q: For earthquakes with a magnitude 7.5 or greater on the Richter​ scale, the time between successive…

A:

Q: Historically daily high temperatures in May in Lawrenceville, Georgia, are normally distributed with…

A: Given data,μ=78σ=4P(X>92)=?

Q: A parenting magazine reports that the average amount of wireless data used by teenagers each month…

A: Solution: Let X be the amount of wireless data used by teenagers each month. From the given…

Q: The results from a statistics class’ first test are as follows: The average grade obtained on the…

A: A normal distribution is also called bell shaped curve which is symmetric about the mean. The…

Q: A population of N = 5 scores has a mean of µ = 20 and a standard deviation of σ = 4. Which of the…

A: Given N=5 Mean=20 Standard deviations=4