Find the z-score corresponding to 55th percentile (0.55 cumulative probability)
Use the equation z = (x - mean)/SD, where x is weight, mean and SD are as given.
Plug found z, given mean and SD into the above equation and solve for x.
Steph M.
asked • 05/17/21Z score from probability
With mean: 100 & S.D: 10 what is the weight separating bottom 55% from top 45%
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