The brain volumes ​(cm3​) of 20 brains have a mean of 1139.4 cm3 and a standard deviation of 125.3 cm3 . Use the given standard deviation and the range rule of thumb to identify the limits separating values that are significantly low or significantly high. For such​ data, would a brain volume of 1430.0 cm3 be significantly​ high? Significantly low value are ___ cm2 or lower? Significantly high values are ___ cm3 or higher? If no 1430.0 cm3 significantly high?

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