in a mathematics test, 25 grade six children from a city school registered a mean score of 78 and a standard deviation of 8.0. in the same test a group of 29 children from the rural area got a mean of 72 with a standard deviation of 5.0. is there a difference between the performance of thetwo groups? assume that the distribution is normal with unequal variance at significance level of 0.01.

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A: Given data,μ=35σ=12P(11<X<35)=?

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Q: A set of wrist watch prices are normally distributed with a mean of 76dollars and a standard…

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Q: tal of 82 Grade 11 students of ABC senior high school took the 60 item test in General mathematics.…

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A: X follows a Normal distribution with mean = 190 and S.D = 18 Then z=(x-mean)/SD = (x-190)/18…

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Q: (a) between 56 and 74. % (b) above 68. % (c) below 56. %

A: here as per guideline i have calculated 3 subparts , plz repost for remainning. Suppose that the…

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Q: The lengths of brook trout caught in a certain Colorado stream are normally distributed with a mean…

A: Mean==14Standard deviation==3

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