Answer:
The value x of the weight of cereal is below the mean value.
Explanation:
z-score value shows how far in standard deviation term is a value lets say x lies from its mean
Given that the mean is 910 grams and standard deviation is 5 grams then;
The formula for calculating z-score is ;
z=(x-μ)/δ ------------------------where z is the z-score, x is the value /outcome of numeric random variable, μ is the mean and δ is the standard deviation
Given μ=910 and δ =5 assume the z-score value =-y then it means the x value for the weight lies y standard deviations below the mean of 910