There are 10 socks in a bag. 5 of those socks are blue.
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The probability that a normally distributed data with a mean of μ and a standard deviation of σ is less than a value x is given by:
Given that μ = 16.5 and σ = 0.804984 and that the probability that the <span>mean oil-change time being at or below the sample mean for which there is an area of 0.10 to the left under the normal curve, then:
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Given that μ = 16.5 and σ = 0.804984 and that the probability that the <span>mean oil-change time being at or below the sample mean for which there is an area of 0.10 to the left under the normal curve, then: