A regulation baseball can weigh no more than 149 grams. A factory produces baseballs with weights that are normally distributed with a mean of 146 grams and a standard deviation of 2.3 grams.

0.9032

Step-by-step explanation:

Given that:

mean (μ) = 146 grams and standard deviation (σ) = 2.3 grams

The z score is a measurement used in statistics to calculate how far a value is from the mean in a normal distribution. The z score is given as:

For the baseball not to weigh more than 149 grams i.e x = 149 g

From the probability distribution table, P(x < 149) = P(z < 1.30) = 0.9032 = 90.32%

describing distributions is one of the key skills you’ll need to earn a high score on the ap statistics exam. if you need proof of this, just flip through some past exam questions, which can be found at the collegeboard website. you’ll notice that the first free response question is almost always a question requiring you to look at a graph and describe it.

step-by-step explanation: just trying to get points sorry : (