The amount of time to complete a physical activity in a PE class is normally distributed with a mean of 35 seconds and a standard deviation of 5.4 seconds.  a) What is the probability that a randomly chosen student completes the activity in less than 31.7 seconds?  b) What is the probability that a randomly chosen student completes the activity in more than 39.9 seconds?  c) What proportion of students take between 32.7 and 38.3 seconds to complete the activity?  d) 85% of all students finish the activity in less than_____seco

Q: The time needed to complete an exam in a college campus is normally distributed with a mean of 80…

A: Given DataMean = 80Standard Deviation = 10a)Probability of completing the exam in one hour or less

Q: Medical research has concluded that people experience a common cold roughly two times per year.…

A: The mean of the normal distribution, The standard deviation of the distribution,

Q: A study indicates that​ 18- to​ 24- year olds spend a mean of 140 minutes watching video on their…

A:

Q: Heights of 10 year old children, regardless of sex, closely follow a normal distribution with mean…

A: Given information: The mean and standard deviation is; μ=55.6, and σ=6.1 respectively.

Q: hotel in a European city follows a normal distribution with a mean of 170 euros and a standard…

A:

Q: Tiger Woods hits an average driver 287.2 yards with a standard deviation of 24.6 yards. What is the…

A: The probability value is calculate by means of standard normal variate with the random variable,…

Q: A study of the time spent shopping in a supermarket for 20 specific items showed an approximately…

A: Provided information is, a study of the time spent shopping in a supermarket for 20 specific items…

Q: The average number of acres burned by forest and range fires in a large county is 3,700 acres per…

A: Mean(μ)=3700 standard deviation(σ)=550

Q: Major league baseball salaries are normally distributed with average 3.3 million with a standard…

A: Answer: From the given data, Suppose X: The salaries of major league baseball X follows a normal…

Q: IQ scores follow an approximately Normal distribution with a mean of 100 and standard deviation of…

A: Population mean μ =100 Population standard deviation =15

Q: Gestation length (in days) of a dog forms a normally distributed data set with mean 69.2 and…

A: Given that gestation length (in days) of a dog forms a normally distributed data set with mean 69.2…

Q: Based on Aircraft Safety Council of Country PQR, an average of 18 aircraft accidents occurred each…

A: Given,an average aircraft accidents occurred each year is 18so an average aircraft accidents…

Q: a. The number of brownies sold by a bakery on a random day is a random variable with a mean value of…

A: From the provided information, Mean (µ) = 38 Standard deviation (σ) = 6 X~N (38, 6) Sample size (n)…

Q: The average number of pounds of red meat a person consumes each year is 196 with a standard…

A: We are given,μ = 196σ = 22n = 60

Q: Major league baseball salaries are normally distributed with average 3.3 million with a standard…

A: Given problem Given that   Major league baseball salaries are normally distributed with average…

Q: Gestation length (in days) of a dog forms a normally distributed data set with mean 66 and standard…

A:

Q: The number of automobile accidents per week in Toronto is normally distributed with a mean of 16.3…

A:

Q: A survey was given to people living in Broward County. The county randomly collected the income…

A: given data  μ = 100000 $σ = 10000 $P(90000<x<110000) = ?

Q: The time until recharge for a battery in a smartphone is normally distributed with a mean of 250…

A: a. Consider that the mean and standard deviation of a random variable X are µ and σ, respectively.…

Q: Recent report in Times showed a typical family of four spends $490 per month on food with a mean of…

A:

Q: The driving distance to work for residents of a community is has a mean of 21 miles and a standard…

A: The objective here is to find the probability that individual drives between 10 and 20 miles to…

Q: Data from the Bureau of Labor Statistics’ Consumer Expenditure Survey show that annual expenditures…

A: Given information- For the year 2001- Population mean, µ = $235 Population standard deviation, σ =…

Q: he number of customers at a coffee shop per day follows a normal distribution with a mean of 3,500…

A: given data, normal distributionμ=3500σ=250probability that the coffee shop will serve more than…

Q: study indicates that​ 18- to​ 24- year olds spend a mean of 115 minutes watching video on their…

A:

Q: a. Find the probability of a pregnancy lasting 308 days or longer. b. If the length of pregnancy is…

A: Given Data Population Mean,μ = 269 Population Standard Deviation,σ = 15

Q: The number of pizzas consumed per month by university students is normally distributed with a mean…

A: Let "X" be the number of pizzas per month by university students. Draw the normal curve and shade…

Q: In a survey of a group of​ men, the heights in the​ 20-29 age group were normally​ distributed, with…

A:

Q: The lengths of pregnancies are normally distributed with a mean of 267 days and a standard deviation…

A: Given,mean(μ)=267standard deviation(σ)=15

Q: Five hundred youths participated in a national sport competition. Their heights averaged 110cm with…

A: Given that

Q: In a survey of a group of​ men, the heights in the​ 20-29 age group were normally​ distributed, with…

A:

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: The lifetime of a particular brand of AA batteries follows a normal distribution. The mean lifetime…

A: Correct answer is d. 0.8944