This is an Excel sheet that calculates both probabilities and percentiles for any normal or standard normal probability distribution. Replaces normal probability tables. Calculates both X (normal) and Z (standard normal) probabilities and percentiles. Quicker to use and more accurate than paper tables.

Probability : Coin Flips - A coin is tossed until four heads occur. What is the probability that the fourth head occurs on the tenth toss?

Understanding standard deviation and z score. - Please answer the following question: - Explain thoroughly, the concept of standard deviation. - How does range affect standard deviation? - What is a z-score, and how do z-scores relate to the mean of a set of data? - Generally speaking, how is the percentage of data which lies in between two z-scores calculated?

Relative Frequency: Definition, Formula and Example. - What does the term relative frequency mean and how does it relate to probability? Give an example.

How to determine if it is a p^ problem or a normal distribution - I need an overview of how probability works, how to determine if it is a p^ problem or a normal distribution

Determining the Probability of the Given Situation: Independent Events - The probability of a newborn baby being a girl is 0.49. If four babies are born in a hospital on one day, what is the probability that all four are girls?