Suppose X is a normal population with the mean D and standard deviation O = 15. A sa of size 25 students and the sample mean_Tin a statistics test was found to be 81. Cor a 99 percent confidence interval.

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Q: A random sample of 106 body temperatures taken from healthy adults had a mean of 98.29o F and a…

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Q: A group of 10 surgery patients had a mean weight of 240 pounds with a sample standard deviation of…

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Q: A random sample of 40 adults with no children under the age of 18 years results in a mean daily…

A: Given       n1=40 ; x1=5.03 ; σ1=2.46     n2=40 ; x2=4.48 ; σ2=1.52At 90 ; CI , the t is…

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Q: Suppose it is known that approximately 30% of households own a sin- gle TV. Use this to obtain the…

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Q: A study of 96 bolts of carpet showed that their average length was 77.5 yards. The standard…

A: GivenMean(x)=77.5sample size(n)=96standard deviation(s)=1.6α=1-0.99=0.01α2=0.005zα2=z0.05=2.58

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Q: A sample of 20 body temperatures resulted in a mean of 98.3° and a standard deviation of .24°. Use…

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A: Given: n=64, x=75 and σ=20.   The value of z at 95% confidence level is 1.96.

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Q: 1. Suppose that 100 samples of water from a fresh water lake are taken and the calcium concentration…

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Q: The wind on any random day in Bryan is normally distributed with a standard deviation of 5 mph. A…

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A: The sample mean is 850 and the population standard deviation is 75.

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A: Given that  Sample size n =69 Sample mean =28.3 Standard deviation =3

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A: Given Information Number of goats = 22 Mean = 6.3 Standard deviation = 1.2 95% confidence interval…

Q: Suppose a random sample of 50 baksetball players showed the average height to be 78 inches. Also…

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Q: A sample of 30 NBA players had a sample mean of their heights as 80.5 inches. If the standard…

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A: Confidence interval: The (1-α) % confidence interval for population standard deviation is given by:

Q: A machine manufactures bolts to a set length. A random sample of 20 bolts is hecked and found to…

A: We have given that,  Sample mean (x̄) = 75.2, standard deviation     (s) = 2.5 and sample size (n) =…