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In a normal distribution, μ = 1400 and σ = 90. Approximately, what percentage of scores...

In a normal distribution, μ = 1400 and σ = 90. Approximately, what percentage of scores lie between 1310 and 1445?

In a population of normally distributed scores, μ = 70 and σ = 24. Approximately what percentage of random samples of 36 scores would have means with a value in the range 64 to 76?

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