Talia tossed a penny many times. she got 40 heads and 60 tails. she said the experimental probability of getting heads was 40/60. explain and correct her error.

Rockwell hardness of pins of a certain type is known to have a mean value of 50 and a standard deviation of 1.1. (round your answers to four decimal places.) (a) if the distribution is normal, what is the probability that the sample mean hardness for a random sample of 8 pins is at least 51?

What does independent variable and dependent variable mean in math?

Is a square always, sometimes, or never a parallelogram