The number of text messages that teenagers send per month is normally distributed with a mean of 3,400 and a standard deviation of 450. If Kendra sent 4,415 text messages last month, find her z-score to the nearest hundredth. Submit

Q: a manufacturer claims that the mean lifetime of its fluorescent bulbs is 1050 hours. a homeowner…

A: Given n=40 Standard deviation =80 Xbar=1030 Level of significance=0.05 Mu0=1050

Q: In a certain city, the average 20- to 29-year old man is 69.8 inches tall, with a standard deviation…

A: Given: The man has a mean of 69.8 inches tall and a standard deviation = 3.2 The z score for the man…

Q: The average 20- to 29-year-old man is 69.6 inches tall, with a standard deviation of 3.0 inches,…

A:

Q: a department store has daily mean sales of $28,372.72. The standard deviation of sales is $2000. On,…

A: The mean and standard deviation of daily sales is : x=$28372.72s=$2000 For Tuesday, the sales were…

Q: According to the data from the National Health Survey, the height of all adult American women are…

A: The score is calculated below:

Q: Books in the library are found to have average length of 350 pages with standard deviation of 100…

A: Given: μ=350σ=100x=80

Q: The drive distance (in yards) for professional golfers is normally distributed with a mean of 308.04…

A: 68-95-99.7-rule: Let X be an observation from a normal distribution, having mean µ and standard…

Q: The speeds of all cars on the tollway was found to be normally distributed with a mean of 63 miles…

A: It is given that that µ=63 mile per hour. Obtain the standard deviation of the speeds of all cars:

Q: The number of minutes spent reading in one day is normally distributed with a mean of μ = 23 and a…

A: The normal distribution:A continuous random variable X is said to follow normal distribution if the…

Q: The life of a battery is normally distributed with mean 70 hours with a standard deviation of 10…

A: Given, μ = 70 σ = 10 Z = X-μσ

Q: During 1 week, an overnight delivery company found that the weights of its parcels were normally…

A:

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

A: 69.5 2.62 64.4 2.53 American woman:

Q: Doug has 1,000 bottle caps in his collection compared to Melissa's 2000 bottle caps. If the average…

A: Given,mean(μ)=1250standard deviation(σ)=500Doug bottle cap collection(X)=1000Melissa's bottle cap…

Q: The mean speed of a sample of vehicles along a stretch of highway is 67 miles per hour, with a…

A: From the provided information, Mean (µ) = 67 miles per hour Standard deviation (σ) = 2 miles per…

Q: video game c

A: given, sample size(n) = 1500 sample mean (x̄) = 115 sample stadard deviation (s) = 11

Q: The admission committee of AUCA passes 61% of those who took the exam. If the scores follow a normal…

A: We have given that.   X~N( μ , ?^2 )   μ =350 , ? =25   Z-score =( x - μ )/?

Q: In an agricultural study, the average amount of corn yield is normally distributed with a mean of…

A: Given :- In an agricultural study, the average amount of corn yield is normally distributed with a…

Q: The number of chocolate chips in an 18-ounce bag of chocolate chip cookies is approximately normally…

A: Givenmean(μ)=1252standard deviation(σ)=129

Q: A set of wrist watch prices are normally distributed with a mean of 76dollars and a standard…

A: From the provided information, Mean (µ) = 76 Standard deviation (σ) = 10 X~N (76, 10) Here X be a…

Q: The lengths of the Atlantic croaker fish are normally distributed with a mean of 10 inches and a…

A:

Q: A particular leg bone for dinosaur fossils has a mean length of 5 feet with a standard deviation of…

A: Given, A particular leg bone for dinosaur fossils has a mean length of 5 feet with a standard…

Q: The length of time it takes a Grade 11 student to play the Candy Crush computer app follows a normal…

A: Given that  The length of time it takes a grade 11student to play the candy crush computer is…

Q: When Lauren runs the 400 meter dash, her finishing times are normally distributed with a mean of 88…

A:

Q: The number of chocolate chips in an 18-ounce bag of chocolate chip cookies is approximately normally…

A:

Q: During 1 week, an overnight delivery company found that the weights of its parcels were normally…

A: A normal distribution is called a standard distribution if; 1. 68% of the values of the random…

Q: The weights of bags of baby carrots are normally distributed, with a mean of 31 ounces and a…

A: Solution: Let X be the weight of bag of baby carrots. From the given information, X follows normal…

Q: The annual commissions per salesperson employed by a retailer of mobile communication devices…

A: Obtain the Z-score for the random variable $32000.   The Z-score for the random variable $32000 is…

Q: The heights of adult men in America are normally distributed, with a mean of 69.4 inches and a…

A: Mean (Adult men) = 69.4 Standard deviation (Adult men) = 2.68 Mean (Adult women) = 64.3 Standard…

Q: when designing aircraft cabins, what ceiling height will alow 98% of men to stand without bumping…

A:

Q: A student will spend 15 hours average each week in class. If the standard deviation is 2 hours, what…

A: Given that mean=15 and standard deviation = 2 Let, X= number of hours spent by a student in the…

Q: The Atlanta Braves baseball team has a mean batting average of 250 with a standard deviation of 20.…

A:

Q: The typical college freshman spends an average of ?=150 minutes per day, with a standard deviation…

A: Solution: Let X be the time on social media. From the given information, X follows normal…

Q: A pipes manufacturer makes pipes with a length that is supposed to be 10 inches. A quality control…

A: The sample size is 39, sample mean is 10.05, sample standard deviation is 0.28. It is clear that the…

Q: According to a report by the U.S. Fish and Wildlife Service, the mean length of six-year-old rainbow…

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

Q: At a college, the mean height of women is 63 inches with the standard deviation of 3 inches. What is…

A: Given,mean(μ)=63standard deviation(σ)=3

Q: The weight of potato chips in a large-size bag is stated to be 24 ounces. The amount that the…

A:

Q: The heights of adult men in America are normally distributed, with a mean of 69.1 inches and a…

A: Heights of adult men is Normally Distributed with mean 69.1 inches and standard deviation 2.68…

Q: A popular soft drink is sold in 1-liter (1,000-milliliter) bottles. Because of variation in the…

A: A continuous random variable X is said to follow Normal distribution with parameters μ and σ2 if…

Q: Describe  the scores in a sample  that has a standard  deviation of zero

A: If the standard deviation is zero there will be no dispersion of scores from the Mean. It means that…

Q: In a particular city, the weight of newly born babies is normally distributed with a standard…

A:

Q: Books in the library are found to have an average length of 350 pages with a standard deviation of…

A: Given that, Books in the library are found to have an average length of 350 pages with a standard…

Q: The average wage for bank managers in a certain city is $91,900 per hour with a standard deviation…

A: Given that  X~N( μ = 91900 , ? = 24300) μ = 91900 , ? = 24300 Z-score =( x - μ )/?

Q: If corn has a normally distributed yield with a mean of 120 bushels per acre and a standard…

A: Given that,  E(X) =120 bushels pet acre Sigma=10 bushels We have to find the percentage of acres…

Q: The heights of 82 roller coasters have a mean of 280.7 feet and a population standard deviation of…

A: Given data normally distributed with mean of 280.7 feet, population standard deviation 59.3 feet and…

Q: The daily water usage per person in Davao City is normally distributed with a mean of 20 gallons and…

A: Empirical Rule : The empirical rule, also referred to as the three-sigma rule or 68-95-99.7 rule, is…

Q: The average 20-to 29-year-old man is 69.6 inches tall, with a standard deviation of 3.0 inches,…

A: Solution: Let X be the height of 20 to 29 year old man and Y be the height of the 20 to 29 year old…

Q: The average price of a personal computer is $949. If the computer distributed with a standard…

A:

Q: The weights of baby tortoises are approximately normally distributed with a mean of 25.6 ounces and…

A:

Q: The daily water usage per person in Davao City is normally distributed with a mean of 20 gallons and…

A: Given that, Mean = 20 Standard deviation = 5

Q: A certain brand of automobile tire has a mean life span of 37,000 miles and a standard deviation of…

A: Let X be the lifespan that follows normal distribution with mean μ = 37,000 miles and standard…