The reading speed of second grade students in a large city is approximately​ normal, with a mean of 89 words per minute​ (wpm) and a standard deviation of 10 wpm.  ​(a) What is the probability a randomly selected student in the city will read more than 94 words per​ minute?

Q: A manufacturer knows that their items have a normally distributed lifespan, with a mean of 4.7…

A: It was given that a manufacturer knows that their items have a normally distributed lifespan. The…

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

A:

Q: The amount of snowfall falling in a certain mountain range is normally distributed with a mean of 70…

A: It is given that the amount of snowfall falling in a certain mountain range is normally distributed…

Q: Suppose that the average outstanding credit card balance for young professionals is Php11,200 with a…

A: Given: Population meanμ=11200Population standard deviationσ=2600Sample size(n)=150

Q: The IQs of 600 applicants of a certain college are normally distributed with a mean of 115 and a…

A: Answer - The IQ of  n = 600 applicants of a certain college are normally distributed…

Q: A standard I.Q. test produces normally distributed results with a mean of 104 and a standard…

A:

Q: The commuting time for a student to travel from home to GHS is normally distributed with a mean of…

A:

Q: Suppose a population of GRE scores has mu = 1000 and standard deviation = 100. Assuming normality,…

A: Given Data Population Mean,μ = 1000.0 Population Standard Deviation,σ = 100.0…

Q: A manufacturer knows that their items have a normally distributed lifespan, with a mean of 6.5…

A:

Q: If the mean fill volume is 12.1 fluid ounces, what should the standard deviation of fill volume…

A: From the provided information, Mean (µ) = 12.1 fluid ounces X~N (12.1, σ) Here X be a random…

Q: A manufacturer knows that their items have a normally distributed lifespan, with a mean of 2.8…

A:

Q: The producer of a weight-loss pill advertises that people who use the pill lose, after one week, an…

A: We want to find the probability of sample mean is 1.77 or more  P(x̄≥1.77)

Q: The average weekly income of a U.S. student worker is $200 with a standard deviation of 50. If a…

A: The given values are, sample size = n = 100 standard deviation = σ = 50 mean = μ = 200 P ( -20 <…

Q: the life expectancy for a species of certain insects is normally distributed with mean of 14.3…

A: It is given that the mean is 14.3 and the standard deviation is 4.3.

Q: At a customer service call center for a large company, the number of calls received per hour is…

A: Z= x-μσ~N(0,1)

Q: If you randomly purchase 3 items, what is the probability that their mean life will be longer than…

A: Given that the items follow a normal distribution with  mean  =13.9 SD       =  2.7 Find the…

Q: A manufacturer knows that their items have a normally distributed lifespan, with a mean of 10.8…

A:

Q: A manufacturer knows that their items have a normally distributed lifespan, with a mean of 3 years,…

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

Q: manufacturer is producing metal rods whose lengths are normally distributed with a mean of 65.0 cm…

A: Population Mean,μ = 65 Population Standard Deviation,σ = 0.3

Q: A manufacturer knows that their items have a normally distributed lifespan, with a mean of 2.2…

A: Mean = 2.2 Standard deviation = 0.7 Sample size = 17

Q: The annual precipitation amounts in a certain mountain range are normally distributed with a mean of…

A: We have to find given probability..

Q: The average rainfall, recorded to the nearest hundredth of a centimeter, in New York City, for the…

A: Let X be the random variable from normal distribution with mean or average (μ) = 9.32 and standard…

Q: In a study researchers found the mean sodium intake in men and women 60 years or older to be 2940 mg…

A: The mean is 2940 and the standard deviation is 1476.

Q: A manufacturer knows that their items have a normally distributed lifespan, with a mean of 8.1…

A: Given that X~N( μ ,σ) where  μ = 8.1 and σ= 1.6 we need to find the probability  P(X > 6) = ?

Q: According to an article in Human Biology, the mean age of childbirth in Columbia, is 44.8 years with…

A: It is given that:

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

A: Given data normally distributed with mean of 196 pounds and standard deviation of 22…

Q: A study shows that the intelligence quotient (IQ) of adults in a country follows a normal…

A:

Q: s that their items have a normally distributed lifespan, with a mean of 13.2 years, and standard…

A: The sampling distribution of the mean life of the sample will also follow normal distribution.  The…

Q: The mean weight of a sample of chocolate bars from a particular chocolate factory is 8 ounces with a…

A: Let X represent the random variable   Mean=8 SD=0.1   X~ Normal (8, 0.12)

Q: The producer of a weight-loss pill advertises that people who use the pill lose, after one week, an…

A: Given information- Population mean, μ = 1.75 pounds Population standard deviation, σ = 0.95 pounds…

Q: The mean life expectancy of televisions manufactured by a certain company is 12 years with a…

A: The provided information is µ=12 σ=5 n=30…

Q: A manufacturer knows that their items have a normally distributed lifespan, with a mean of 6 years,…

A: Mean = 6 Standard deviation = 1.8 Sample size = 4

Q: A manufacturer knows that their items have a normally distributed lifespan, with a mean of 14.2…

A: Let "M" be the mean lifespan of the item in years.

Q: The time for a student to commute from home to a university campus is Normally distributed with a…

A: It is given that the mean is 25 minutes and the standard deviation is 10 minutes.

Q: A manufacturer knows that their items have a normally distributed lifespan, with a mean of 9.5…

A: Let "M" be the mean lifespan of the item in years.

Q: Suppose the reaction times of teenage drivers are normally distributed with a mean of 0.53 seconds…

A: If a random variable x has a distribution with mean µ and standard deviation σ, then the z-score is…

Q: The producer of a weight-loss pill advertises that people who use the pill lose, after one week, an…

A:

Q: According to records, the amount of precipitation in a certain city on a November day has a mean of…

A: Given, Mean of precipitation is 0.10 and standard deviation is 0.05 A random sample of 40 days.

Q: The annual precipitation amounts in a certain mountain range are normally distributed with a mean of…

A: Normal distribution - The normal distribution is widely used to calculate probabilities which are…

Q: A market researcher analyzes how many cases of bottled water a customer buys at a grocery store. The…

A: Given that the mean is 3.0 and standard deviation is 0.7. That is,  μ=3.0σ=0.7 sample size=400…

Q: what is the probability that the mean weight loss after one week on this pill for a random sample of…

A:

Q: A manufacturer knows that their items have a normally distributed lifespan, with a mean of 10.1…

A:

Q: The average credit card debt for college seniors is$3262. If the debit is normally distributed with…

A: The distribution of credit card debt is given as, X~N(µ=3262, σ=1100).

Q: A population of 2,800 students from a certain region have normally distributed National Examination…

A: Given,sample size(n)=35mean(μ)=89standard deviation(σ)=5

Q: In the country of United States of Heightlandia, the height measurements of ten-year-old children…

A: We have to find the probability that a randomly chosen child has a height of less than 59.4 inches.

Q: A manufacturer knows that their items have a normally distributed lifespan, with a mean of 5.3…

A: Here, µ = 5.3, σ = 1.3, and n = 4.

Q: The mean age of a random sample of 25 people who were playing the slot machines is 48.7 years, and…

A: From the given informations: μ1=48.7, σ1=6.8, n1=25μ2=55.3, σ2=3.2, n2=35H0:μ1=μ2H1:μ1<μ2 c.…

Q: The producer of a weight-loss pill advertises that people who use the pill lose, after one week, an…

A: Given Sample size=n=55Sample Mean=x¯=1.7Population Standard deviation=σ=0.95Population mean=μ=1.8

Q: The average age of lawyers is 43.6 years, with a standard deviation of 5.1 years. If a law firm…

A:

Q: In a study researchers found the mean sodium intake in men and women 60 years or older to be 2940 mg…

A: Given that, μ=2940,σ=1476,n=75 The mean and standard deviation of the sampling distribution of…

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.