An anthropologist is interested in estimating the age of a series of 582 fossils that were recently discovered. How many fossils would need to be tested to estimate their true average age with 95 %confidence and a margin of error of no more than 1000 years? Assume the standard deviation of fossils discovered is known to be 10000 years.

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A: GivenMean(μ)=64.5standard deviation(σ)=2.4

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A:

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A: Given that  Standard deviation = 16 Margin of error = 5

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A: Solution

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A: "Since you have asked multiple questions, we will solve the first question for you. If you want any…

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A: Given,standard deviation(σ)=100

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A: From the provided information,Mean (µ) = 1400Standard deviation (σ) = 100X~N (1400, 100)90,000 of…

Q: Suppose that the lifetimes of a certain kind of light bulb are normally distributed with a standard…

A: We have to find population mean.

Q: Suppose that the lifetimes of a certain kind of light bulb are normally distributed with a standard…

A: W ehave to find population mean.

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A: Given information Standard deviation σ = 1.40 Confidence interval = 0.99 Significance level(α) = 1-…

Q: How many retired people should be sampled if we want to calculate with 92% confidence the true mean…

A: The provided information are: Confidence level = 92% Margin of error (E) = 0.8 Population standard…

Q: hours. If exactly 98% of the bulbs die before 925 hours, find the mean lifet

A: The z score is calculated as: z=x-μσ The value of z at 98% is 2.05. (from z table).

Q: Suppose that the lifetimes of a certain kind of light bulb are normally distributed with a standard…

A:

Q: ose that the heights of adult women in the United States are normally distributed with a mean of…

A: The z score can be calculated as: z=x-μσ The required z score that is associated with the 85% to the…

Q: Suppose that the lifetimes of a certain kind of light bulb are normally distributed with a standard…

A: Given information Lifetimes of a light bulb is normally distributed with a standard deviation of 120…

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Q: uppose that the lifetimes of a certain kind of light bulb are normally distributed with a standard…

A: Given that   Certain kind of light bulb are normally distributed. Standard deviation (σ) = 100 90%…

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A: Given: Sample standard deviation s = 9 Difference d = 9 Significance level α = 0.025 Formula Used: n…

Q: Suppose that the lifetimes of a certain kind of light bulb are normally distributed with a standard…

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A: A population has a standard deviation of 18.

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A:

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Q: Suppose that the lifetimes of a certain kind of light bulb are normally distributed with a standard…

A: SD = 120 hours99% = 99/100 = 0.99X = 925 hours

Q: Suppose that the lifetimes of TV gives are normally distributed with a standard deviation of 1.2…

A: Let us assume X=the lifetimes of TV  Given that X follows a normal distribution with mean=μ (let)…

Q: Suppose that the lifetimes of TV tubes are normally distributed with a standard deviation of 1.2…

A: Given,           Standard deviationσ=1.2