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

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

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?

Statistics and 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