Но о : и< 72.2 Η1 : μ> 72.2 is to be carried out for a population where o is known to be 13.1. A random sample has a mean of 74.8 and yields the test statistic of Zc = 0.93092. What was the size of the sample?

Q: Test the claim about the population mean, µ, at the given level of significance using the given…

A: Solution: State the hypotheses. Null hypothesis: Alternative hypothesis: Thus, the correct option…

Q: In a Z-test, the number of degrees of freedom is A none of these B 1 C) n-1 D n-2

A: AS PER GUIDELINE EXPERT HAVE TO ANSWER FIRST QUESTION ONLY.  SOJCE I HAD DONE ALL FOR YOU.  AND ALL…

Q: A sample of 14 forest deer mice have an average body length of x = 91.1 mm. Do forest deer mice on…

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A: Given: μ = 80 z = 5 X= 92

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A: Given data, σ = 18 n = 4   The standard error measures the distance expected on an average between…

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A: we have given that  n1=35 ,n2=35 ,xbar =43,  xbar =44 ,sigma1=4.7 and sigma2=4.5   Note : according…

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A: Given: μ=300, σ=30.

Q: test sta places test statistic = p-value = Can we conclude that the proportion taking a vitamin pill…

A: A z-test for one proportion used here that attempts to make a claim about the population proportion…

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A: The test is right-tailed.The population standard deviation is known.Sample size is .Significance…

Q: At α=0.10​, can the engineer support the claim that the mean braking distances are different for the…

A: For make A, sample size n1 = 35, sample mean = 40 and population SD = 4.8 For make B, sample size n2…

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A: The given information is that the average level of the sample of 30 men between the ages of 25 and…

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A:

Q: Unfortunately, arsenic occurs naturally in some ground water.t A mean arsenic level of u = 8.0 parts…

A: a)   Assume that μ is the population average of arsenic level.

Q: What can be concluded at the αα = 0.05 level of significance?

A: Given that sample size n = 399 Number of millionaires who could wiggle their ears, X = 60 Level of…

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A: In hypothesis testing, there are always two hypotheses viz. null hypothesis and alternative…

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A:

Q: Consider the sampling distribution of the sample mean x.

A:

Q: If a population of N=10 scores has a mean of ux=30 and a standard deviation of ox=9, then the…

A:

Q: Consider a large population with?=67 and ?=6. Assuming ?/?≤0.05, find the mean and standard…

A: GivenMean(μ)=67standard deviation(σ)=6

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Q: A random sample of n=4 is obtained from a population with a mean of u=80 and a standard deviation of…

A: It is given that the, A random sample of n=4 is obtained from a population with a mean of u=80 and a…

Q: o compare the dry braking distances from 30 to 0 miles per hour for two makes of​ automobiles, a…

A:

Q: suppose the average time to fill a routine prescription at a local pharmacy is 35 minutes based on…

A: Given data,Mean μ=35sd    σ=11x=48z=?

Q: To compare the dry braking distances from 30 to 0 miles per hour for two makes of​ automobiles, a…

A: Solution: Given information: n1=35 Sample size model An2=35 Sample size model B x1= 41 Sample mean…

Q: random sample of  n1 = 49  measurements from a population with population standard deviation  ?1 =…

A: