GreenBeam Ltd. claims that its compact fluorescent bulbs average no more than 3.4 mg of mercury. A sample of 40 bulbs shows a mean of 3.46 mg of mercury.   (a) Assuming a known standard deviation of 0.20 mg, calculate the z test statistic to test the manufacturer’s claim. (Round your answer to 2 decimal places.)   Test statistic _______.   (b) Find the p-value. (Round intermediate calculations to 2 decimal places. Round your answer to 4 decimal places.)   p-value    ______

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A: Given that μ=1.157 & σ=0.532

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A:

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

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A: Sample size n =31 Sample mean=30 Population standard deviation =4

Q: Use z scores to compare the given values.   Based on sample​ data, newborn males have weights with a…

A: Answer: the given value are Based on sample​ data, newborn males have weights with a mean of μ =…

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A:

Q: The scores on a mathematics exam have a mean of 71and a standard deviation of 8. Find the x-value…

A: Let X denote the scores on a mathematics exam and it follows normal distribution with mean of…

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A:

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Q: Suppose that the antenna lengths of woodlice are approximately normally distributed with a mean of…

A: Population mean, Population standard deviation, To find:

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A:

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A: Standard normal distribution:The normal distribution has mean as 0 and standard deviation as 1.The…

Q: Eliminating some scores from a point near the mean will Select one: O a. not affect the standard…

A: Measure of central tendency measures the central or average value of a dataset. Measured of…

Q: Alexander Borbely is a professor at the University of Zurich Medical School, where he is director of…

A: Hrs Xi         Freq fi             pi=fi/200         xi* pi              pi*(x-7.9)^2 3.5…

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A: According to the given information, we have Mean = 6.9 Standard deviation = 1

Q: A survey found that the average hotel room rates and standard deviations for the state of…

A: We want to find the p value

Q: On a recent biology quiz, the class mean was 21 with a standard deviation of 3.8.   a. Calculate the…

A: The objective of the question is to calculate the z-scores for the biology quiz and the marketing…

Q: The systolic blood pressure of adults in the USA is nearly normally distributed with a mean of 117…

A: Given,mean(μ)=117standard deviation(σ)=18

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A: It is given that  Mean, μ = 84 Standard deviation, σ = 8

Q: The Central Intelligence Agency (CIA) has specialists who analyze the frequencies of letters of the…

A:

Q: Assume that adults have IQ scores that are normally distributed with a mean of 98.4 and a standard…

A: X:adults IQ scores X has normally distributed X~N(μ,σ) Mean(μ)=98.4 and Standard deviation(σ)=20.3…

Q: The first quartile is

A: here use standard normal distribution table for z score for 0.25

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A: Z=X¯-μσ=Z score μ=mean and σ= standard deviation

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Q: Assume that adults have IQ scores that are normally distributed with a mean of 96.3 and a standard…

A: Given :  IQ scores that are normally distributed with a mean of 96.3 and a standard deviation 17.…

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A:

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A: Given that  X~Normal(μ=99.2 , σ=24.2) If X follows normal distribution then formula for first…

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A: The provided information are: Population meanμ=112Standard deviationσ=17 Consider X be a random…

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A: Given  that,             Mean, x¯=119.2 mm Hg            Standard Deviation, s=12.1 mm Hg a) To…

Q: Use z scores to compare the given values.   Based on sample​ data, newborn males have weights with a…

A:

Q: Assume that adults have IQ scores that are normally distributed with a mean of 96.2and a standard…

A: Solution: Let X be the IQ score. From the given information, X follows normal distribution with mean…

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A: It is given that the mean is 14 and the standard deviation is 2.4.

Q: t the residents of a local town reported sleeping an average of a=7.97 hours each night with a…

A: Given : sample mean= x̅ = 7.766 population mean=μ = 7.97

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A: baby girls with a mean of 12.8 pounds and a standard deviation of 1.9

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A: