An LED lightbulb manufacturer produces lights with a mean lifespan of 10,000 hours and a standard deviation of 1,000 hours. What are the odds that a randomly selected light bulb will last more than 13,000 hours ?

Q: A Texas Instrument calculator operating life is normally distributed with a mean of 3,850 hours, and…

A: Given information- Population mean, μ = 3850 hours Population standard deviation, σ = 350 hours…

Q: Furnace repair bills are normally distributed with a mean of 264 dollars and a standard deviation of…

A: Let X denote the cost of furnace repair bills. Given that X follows Normal(mean = 264, SD = 30)

Q: a typical adult has an average IQ score of 105 with a standard deviation of 20. If 19 randomly…

A:

Q: In an all boys school, the heights of the student body are normally distributed with a mean of 68…

A:

Q: A car insurance company tells its prospective customers that they can save an average of at least…

A:

Q: The sale price of a certain model of grand piano across the country is approximately normally…

A: Given: Mean = 70000, Standard deviation =5400 Let Y defines the sale of certain model of grand…

Q: A company make LED light bulbs and claims that they have a life of 20,000 hours. A sample of 16bulbs…

A: From the given information, Sample size (n) = 16 Sample mean (x-bar) =19706 Standard deviation (s) =…

Q: A tool company claims that the mean number of defective screws they produce per box is 72. The mean…

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Q: According to a dietary study, high sodium intake may be related to ulcers, stomach cancer, and…

A:

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: In a random sample of 48 people, the mean body mass index (BMI) was 28.3 and the standard deviation…

A: Given that Random sample size(n) =48 Mean body mass index (x¯)=28.3 Sample standard deviation (s)…

Q: Find the mean, standard deviation, skewness, kurtosis of the blood sugar

A: Given data is:

Q: A study found that the heights of college males follow a normal distribution with a mean of 70…

A:

Q: A company makes batteries that have life spans with a mean of 3000 hours and standard deviation of…

A: From the given information, Sample size (n) = 85 Mean (µ) =3000 Standard deviation (σ) =70 Consider,…

Q: The length of an episode of the hit TV show, Fake Blood, is normally distributed with a mean of 62…

A: Given that  X~Normal(μ=62 , ?=4.5) Mean=μ=62 , Standard deviation=?=4.5)

Q: A particular leg bone for dinosaur fossils has a mean length of 60 inches with standard deviation of…

A: Given:  X= length of leg bone for dinosaur fossils  Mean of X = 60 inches  Standard deviation of X =…

Q: A recent Gallop Poll indicates that 80 % of voting age adults disapprove of Congress. If 700 voting…

A: Let p be the probability that a voting age adult disapproves of Congress. Given that p = 0.80 Let X…

Q: When testing a hypothesis about a single mean, if the sample size is 51 and the population standard…

A: From the provided information, Sample size (n) = 51 The population standard deviation is known.

Q: A large corporation pays its employees an average of $64,000 per year with a standard deviation of…

A:

Q: A small retail store has customers whose ages are normally distributed, with a mean of 37.5 and a…

A: Let X denote the customer ages and it follows normally distribution with a mean of 37.5 and a…

Q: A local sports magazine reports the mean length of a baseball game to be 175.9 minutes with a…

A: Given, mean, μ= 175.9 minutes standard deviation,  = 27 minutes n = 30

Q: A tool company claims that the mean number of defective screws they produce per box is 72. The mean…

A:

Q: The Real Estate Group NY reports that the mean monthly rent for a one-bedroom apartment without a…

A: Given : Mean (μ) = 2635      (in $)Standard deviation = 499      (in $)Sample size (n) = 98

Q: If a golfer hit drives a golf ball with a mean of 180 yards and a standard deviation of 20 yards,…

A: We have given that  A golfer hit drives a golf ball with a mean of 180 yards and a standard…

Q: 4 An LED lightbulb manufacturer produces lights with a mean lifespan of 10,000 hours and a standard…

A: Given information- Population mean µ = 10,000 hours Population standard deviation, σ = 1,000 hours…

Q: A study of the amount of time it takes a mechanic to rebuild the transmission for a 2005 Chevrolet…

A: Given Information: Mean = 8.4 Standard Deviation = 1.8 n = 40

Q: A manufacturer knows that their items have a normally distributed length, with a mean of 13 inches,…

A:

Q: A grocery store's sales experience indicates that its daily apple sales follow a normal distri-…

A: (b) Obtain the cut off point for the top 10% of all daily apple sales. The cut off point for the top…

Q: The average person uses 130 gallons of water daily. If the standard deviation is 35 gallons , find…

A: Given that, Mean = 130 Standard deviation = 35 Sample size = 25

Q: In a recently conducted study, families reported using an average of 70 gallons of gasoline per…

A:

Q: A typical adult has an average IQ score of 105 with a standard deviation of 20. If 20 randomly…

A: Concept of sampling distribution of sample mean: Let a particular characteristic of a population is…

Q: The reading speed of sixth-grade students is approximately normal, with a mean speed of 125 words…

A: Given mean speed of 125 words per minute and a standard deviation of 24

Q: The heights of 18-year-old men are approximately normally distributed with a mean of 68 inches and a…

A:

Q: A population of 25-28 year-old males has a mean salary of $29,321 with a standard deviation of…

A: From the information, the mean salary of $29,321 with a standard deviation of $2,120.

Q: A high end store is looking to open new stores, but requires that 85% of the households in a…

A: Let X= income of the households  Given that X is normally distributed with mean= 98000 and standard…

Q: In a recent​ year, the scores for the reading portion of a test were normally​ distributed, with a…

A: Given data,μ=22.9σ=6.7P(X<18)=?

Q: A company selling a new MP3 player advertises that the player has a mean lifetime of 5 years. If you…

A:

Q: In an article about the cost of health care, Money magazine reported that a visit to a hospital…

A: Given data,μ=328σ=92P(X>500)=?

Q: The life of an electronic transistor is normally distributed, with a mean of 500 hours and a…

A:

Q: the average time spent on a watching television in a state in the USA is 140 minutes the standard…

A: In question, Given that the average time spent on a watching television in a state in the USA is 140…

Q: Furnace repair bills are normally distributed with a mean of 267 dollars and a standard deviation of…

A: Let us denote: X=Furnace repair billsGiven that X follows a normal distribution with mean=267 and…

Q: An electrical appliance made by company A has an average life of 2500 hours, with a standard…

A: Given : μ1 = 2500μ2 = 2300n1 = 300n2 = 200σ1 = 500σ2 = 800

Q: A spark plug manufacturer claims that the lives of its plugs are normally distributed with a mean of…

A: Let us denote: X= the lives of its plugs X follows a normal distribution with mean=60,000 and…

Q: A study of the amount of time it takes to rebuild the transmission for a 2005 Chevy Cavalier shows…

A: Given information- Population mean, µ = 8.4 hours Population standard deviation, σ = 1.8 hours We…

Q: A fast food restaurant during its rush time has a mean waiting time of 15 minutes with a standard…

A: The random variable waiting time follows normal distribution. We have to find the probability that…

Q: A factory produces LED bulbs with an average lifespan of 50,000 hours and a standard deviation of…

A: Given dataMean = 50000Standard deviation = 4000If it is known that a bulb already has lasted for…

Q: In a murder trial in Los Angeles, a shoe expert stated that the heights of men with size 12 shoes is…

A: The Z-score of a random variable X is defined as follows: Z = (X – µ)/σ. Here, µ and σ are the mean…

Q: Furnace repair bills are normally distributed with a mean of 269 dollars and a standard deviation of…

A: Given: Population meanμ=269Sample size(n) =64Population standard deviationσ=20 Consider X be the…

Q: The ages of patients in a hospital were normally distributed with a mean of sixty-three years and a…

A:

Q: The heights of 18 year old men are normally distributed with a mean of 67 inches and a standard…

A: Given distribution is normally distributed with mean 67 and standard deviation 3 x~N(μ=67, σ=3)

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.