The weights of a certain fruit in a grocery store are normally distributed with a mean of 150 grams and a standard deviation of 20 grams. What is the probability that a randomly selected fruit weighs between 130 and 170 grams?
Added by Lucy Y.
Step 1
To find the z-score, we use the formula: z = (x - μ) / σ For the lower bound of 130 grams: z1 = (130 - 150) / 20 = -1 For the upper bound of 170 grams: z2 = (170 - 150) / 20 = 1 Show more…
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