Q: Historic records show that the mean duration of an activity is expected to be 8 days with a standard deviation of 2.4 days. What is the probability that the duration

Q: 2. The average test score in a certain statistics class was 74 with a standard deviation of 8. There…

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

Q: deviation is 50 litres (and is normally distributed), what is the probability that a household will…

A: Let X be the random variable from normal distribution with average or mean (μ) = 210 liters standard…

Q: Q3. A certain brand of LED lamps have an average life of 360 hrs with a population standard…

A:

Q: The MBA program at Dover College has enrollment of 160 students with an average of 34.7 years old…

A:

Q: 5. The mean weight of 10 year old boys is 85 pounds the standard deviation is 12 pounds.. The…

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

Q: Q4: the statistics exam score of students has mean 74 and standard deviation 6.8. if a sample of 50…

A: Given,mean(μ)=74standard deviation(σ)=6.8sample size(n)=50

Q: a) What are the mean and standard deviation of the volume shampoo?dialbllah arenodd b) What is the…

A: NOTE: As per the guidelines, we are supposed to solve the first three sub parts only.

Q: "Ch6. Traveling between University of Santo Tomas and Rizal Park, Manila via shuttle bus takes, on…

A: Solution: Let X be the transport time. From the given information, X has mean µ=31 minutes and a…

Q: 5. Systolic blood pressures are assumed to follow a normal distribution with a mean of 108 and a…

A:

Q: you investigate the earnings of a financial advisor in a wealth management company. they earn on…

A: the PDF of normal distribution is = 1/σ * √2π * e ^ -(x-u)^2/ 2σ^2standard normal distribution is a…

Q: 199. If the average cost of a hospital stay is $4200 with a standard deviation of $1000, and…

A: Given Data : Population Mean,μ = 4200 Population Standard Deviation,σ = 1000

Q: In an examination in Statistics, the mean grade is 72 and the standard deviation is 6. Find the…

A: Given that ; Population mean (u) = 72 Standard deviation = 6  By using standard normal distribution…

Q: Adam Sucrose is a market trader and counts the number of customers he sells to every day. The daily…

A:

Q: An English literature course was taken by 250 students. Each member of a random sample of 50 of…

A: a) The required probability is calculated as follows: PX¯-μ>2.5=PZ>2.53050…

Q: Mathematics majors generally have one of the highest starting salaries. Suppose the average starting…

A: For Normal distribution z score = (x-μ)/σx

Q: High school girls average 80 text messages daily. Assume the population standard deviation is 15…

A: Given information:

Q: What is the standard deviation of a binomial distribution where n = 16 and p = 0.20? Select one:…

A: Here, the random variable X follows binomial distribution with n = 16 and p = 0.20.

Q: A. What is the mean of the distribution? B. What is the standard deviation of this distribution? C.…

A: Introduction:Suppose a random variable, X has a continuous uniform distribution within an interval…

Q: Basketball players drink 2.3 liters of water (on the average) with a standard deviation of 0.9 liter…

A:

Q: The score obtained on an intelligence test is normally distributed, with an average score (μ) of 120…

A: The random variable X is defined as the score obtained on an intelligence test which follows normal…

Q: set of scores. 4. On the average, teenagers spend 7.4 hours sleeping at night, witha standard…

A: Given Data : Population Mean,μ = 7.4 Population Standard Deviation,σ = 1.3

Q: The probability that a person catches a cold during the cold and flu season is 0.4. Assume that 10…

A: Solution: Let X be the number of people catching a cold. From the given information, probability…

Q: (a) What is the probability that next year the total precipitation for New York State is more than…

A: (a) The random variable X is defined as the annual precipitation amount which follows normal…

Q: Given mean and standard deviation, motivation scores are 65 and 5, respectively, calculate the…

A: Given,mean(μ)=65standard deviation(σ)=5

Q: The probability that a person catches a cold during the cold and flu season is 0.4. Assume that 10…

A: Solution : Given that, p = 0.4 q = 1 - p =1-0.4=0.6 n = 10

Q: 2444The weight of a mechanical component is normally distributed with a mean of  22 oz and a…

A: The weight of a mechanical component is normally distributed with a mean of 22  oz and a standard…

Q: Weekly Income of Private Industry Information Workers The average weekly income of information…

A:

Q: "Ch6. Traveling between University of Santo Tomas and Rizal Park, Manila via shuttle bus takes, on…

A: Central Limit Theorem for mean: If a random sample of size n is taken from a population having mean…

Q: The score obtained on a Maths exam is normally distributed, with an average score (μ) of 56 and a…

A: According to the provided information, Mean (μ) = 56 Standard Deviation (σ) = 11.25

Q: The time taken to complete a 25km race is normally distributed, with an average time (μ) of 2.30…

A:

Q: ccording to government data, the probability that a woman between the ages of 25 and 29 was never…

A: Given Data sample size,n= 10 probability,p= 0.4

Q: Experience has shown that the weight of lemons produced by an orchard is normally distributed, with…

A: From the provided information, Mean (µ) = 50 g Standard deviation (σ) = 8.50 g Let X be a random…

Q: One in ten adults in a city visited a doctor last month. If a sample of 6 adults is selected…

A: Given,  One in 10 adults visited a doctor => p = 1/10 = 0.1 Sample size, n = 6 Let X is the…

Q: On average, TV crash after 109,000 hours of continuous use. Although the time for the TV to crash is…

A: From the provided information, On average, TV crash after 109000 hours of continuous use that is…

Q: ne Energizer Company claims that the life of oproximately normally distributed with a mean lengt hen…

A: (a) As the population standard deviation is known, it can be said that the distribution follows a…

Q: a. The mean of this distribution is b. The standard deviation is c. The probability that the the…

A: Note: According to Bartleby expert guidelines, we can answer only first question with their three…

Q: Full-time Ph. D students receive an average of $12,837 per year. If the average salaries are…

A: Given that, Mean = 12837 Standard deviation = 1500

Q: When will I see the credit?  In a random sample of 170 customers, 90 ordered chicken sandwitches…

A: The probability that at least 150 favor a charter school is obtained below: From the given…

Q: The time taken to download a particular app has been found to be normally distributed, with an…

A: Probability takes value ranges from 0 to 1. It can't take any negative values or values greater than…

Q: Use technology to solve the following problem: A normal population has a mean = 31 and standard…

A: Given Information: Mean, μ=31Standard Deviation, σ=7To find out the probability that a randomly…

Q: The score obtained on an intelligence test is normally distributed, with an average score (ʅ) of 120…

A: Obtain the standard z-score for the random variable X equals 119 The standard z-score for the random…

Q: The price of lunch at the mall has a mean of $5.00. The standard deviation is $1.50. What is the…

A:

Q: b. The life expectancy of people in Oman is normally distributed. If the mean and standard deviation…

A: Solution: Let X be the random variable defined as the life expectancy of people in Oman. It is given…

Q: (d) What is the probability that chloride concentration differs from the mean by more than 1…

A: Here AS per givens note I have calculated d,e, f parts Here mean = 104 Standard deviation  = 5

Q: What is the standard deviation for the number of tails when eight coins are tossed? O 1.41 2.0 4.0…

A: As per guideline expert have to answer first question only dear student please upload

Q: Suppose you sample one value from a uniform distribution with a =0 and b= 50. a. What is the…

A: Let X be a random variable which follows uniform distribution with probability distribution function…

Q: A certain type of battery has a mean shelf life of 600 days with a standard deviation of 28 days.…

A: Given: μ=600 and σ=28. The z-score is calculated asz=x-μσwhere x is number of days of the shelf life

Q: 2) The owner of a computer repair shop has determined that their daily revenue has mean $7200 and…

A: Given that: X is normally Distributed with mean µ = 7200.0 and standard deviation σ = 1200.0 By…

Q: In a population of statistics students it was found that the mean score on the final is 150 with a…

A:

Q: Q 2(b) For a certain population of people, you are told the mean salary is €43,000 and its standard…

A: GivenMean(μ)=43000standard deviation(σ)=15000