A company claims that the average life of fluorescent light tubes produced by the company is more than 1600 hrs. A sample of 100 fluorescent light tubes has a mean life of 1630 hours. The standard deviation of the population is 120 hours. At α = 0.1, is there any evidence to support the claim?        ( Diagram required and standard normal distribution table is attached beow the question)

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A: According to Empirical Rule : 68% of data falls within the first standard deviation (µ ± σ) = (170 ±…

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A:

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Q: The number of hours spent studying by students on a large campus in the week before final exams…

A: Given: σ=8.4 hours

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A:

Q: body temperatures of a group of healthy adults have a bell-shaped distribution with a mean of…

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

Q: A laboratory claims that the mean sodium level, μ, of a healthy adult is 139 mEq per liter of blood.…

A: Given information- Sample size, n = 34 Population mean, µ = 139 mEq per liter of blood Sample mean,…

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Q: opulation with a standard deviation of 40, how large a sample is necessary to have a standard error…

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A: Let X denote the blood platelet counts of a group of women. Given that X follows N(mean = 252.4, SD…

Q: A manufacturer of ball bearings specifies that the diameter of the bearing should be 0.05…

A: Givensample size(n)=30Mean(x¯)=0.03standard deviation(σ)=0.05significance level(α)=5%=0.05

Q: The heights of male students are normally distributed with a mean of 170 cm and a standard deviation…

A: The heights of male students are normally distributed with a mean of 170 cm and a standard deviation…

Q: The Precision Scientific Instrument Company manufactures thermometers that are supposed to give…

A: Given data, μ = 0°Cσ = 1°C Normal  distribution

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A: Given Information: Sample size of people playing slot machines (n1) = 25 Mean age of people playing…

Q: The average amount spent per customer at a restaurant on lunch is $15 with a standard deviation of…

A: Given information: Denote the random variable as X = Amount spent per customer. The mean and…

Q: A manufacturer claims that the average lifetime of its lightbulbs is equal to 36 months. A random…

A:

Q: A manufacturer of ball bearings specifies that the diameter of the bearing should be 0.05…

A: Given : n=30 , X-bar=0.03  , σ=0.05 , μ0=0.05 , α=0.05 Here , we want to test the claim that the…

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Q: A fast food outlet claims that the mean waiting time in line is less than 3.4 minutes. A random…

A: Hypothesis, Ho: the mean waiting time in line is less than 3.4 minutes. (mu<3.4) H1: the mean…

Q: The mean body mass index (BMI) for boys of age 12 years is 23.6 kg/m2. An investigator wants to test…

A: Given that - The mean body mass index (BMI) for boys of age 12 years is 23.6 kg/m2. An investigator…

Q: population is 3. A researcher wishes to see if that average has changed. He selected a random sample…

A: A) Ho: \mu = 59593μ=15 H1: \mu < 59593μ≠​15  (claim) This corresponds to a two-tailed test.

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A: The mean of the capacitance of capacitors is 1000 μF. The standard deviation of the capacitance of…

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A: z-test: If the given sample size is more than 30 then that is a large sample test. z test comes…

Q: The blood platelet counts of a group of women have a bell-shaped distribution with a mean of 255.8…

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Q: The body temperatures of a group of healthy adults have a normal distribution with a mean of 98.37…

A: It is given that the body temperatures of a group of healthy adults follow normal distribution with…

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A: State the hypotheses. That is, the mean water temperature downstream from a discharge pipe at a…

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A: Given:

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A:

Q: The Precision Scientific Instrument Company manufactures thermometers that are supposed to give…

A: The mean is 0 and the standard deviation is 1.

Q: The blood platelet counts of a group of women have a bell-shaped distribution with a mean of 247.3…

A:

Q: A laboratory claims that the mean sodium level, µ, of a healthy adult is 140 mEq per liter of blood.…

A: Solution: Given information: n= 20 Sample size  x= 137 mEq   Sample mean μ= 140 mEq   Population…

Q: Assume the population data in this scenario is normally distributed. a. What is the probability that…

A: Let X be the random variable from Normal distribution with mean (μ) = 120, standard deviation (σ) =…

Q: A company claims that the average life of fluorescent light tubes produced by the company is more…

A: a) Consider that μ is the true average life of fluorescent light tubes produced by the company.

Q: A laboratory claims that the mean sodium level,  μ , of a healthy adult is  142  mEq per liter of…

A: Given : Population parameters                and sample statistic are               ,  Hypothesis:…

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A: Give Data: Population mean=3   Sample mean=3.05 n=20 Sample standard deviation=0.05

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A: We have given that  Sample size n= 1300 , sample mean = 12.3 mu=13 , standard deviation s=0.5

Q: In a previous study conducted several years ago, a man owned on average  14  dress shirts. The…

A: From the provided information, Sample size (n) = 45 Sample mean (x̅) = 13.8 Population standard…

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A: Given  For cotton fiber: n1=25x¯1=20s1=1.5 For acetate : n2=25x¯2=12s2=1.25 α=significance…

Q: The blood platelet counts of a group of women have a bell-shaped distribution with a mean of 249.8…

A:

Q: A consumer products magazine indicated that the average life of a refrigerator before replacement is…

A: Note: Hey, since multiple sub parts are posted, we will answer first three sub parts according to…

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A:

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A: Given  mu=26,n=25 Xbar=23.6, s=4 We want to test the t statistic

Q: The Precision Scientific Instrument Company manufactures thermometers that are supposed to give…

A: Let z be the standard normally distributed random variable with mean 0 and standard deviation 1

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A: Here we need to find the raw score of the time that an internet providers Custer spend online. Given…

Q: The IQ of 1,000 incoming students at University of Bayabas is normally distributed with a mean of…

A: Given information: The IQ of 1,000 incoming students at University of Bayabas is normally…