1. If a basketball player makes 9 baskets in 12 tries, what is her ratio of baskets to tries, in lowest terms?
1 answer:
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Answer:
2.28% probability that it will weigh less than 900 grams
Step-by-step explanation:
Problems of normally distributed samples are solved using the z-score formula.
In a set with mean and standard deviation
, the zscore of a measure X is given by:
The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.
In this problem, we have that:
What is the probability that it will weigh less than 900 grams?
This probability is the pvalue of Z when X = 900. So
has a pvalue of 0.0228.
2.28% probability that it will weigh less than 900 grams