STATS AND PROB 2

• A large number of random variables has the natural tendency to approximate the shape of a bell. Its distribution is known as normal distribution.
• The graphical form of this distribution called a normal curve.
• Property 2: The curve is symmetric about its mean.
• Property 3: The mean, the median, and the mode coincide at the center.
• Property 4: The width or spread of the curve is determined by the standard deviation of the distribution.
• Property 5: The curve is asymptotic to the base line.
• Property 6: The area under the curve is 1.
• The normal probability distribution is bell-shaped.
• Normal Probability Distribution random variable: continuous
• Normal Probability Distribution, Probability Distribution: Probability Density Function
• A normal distribution with mean u = 0 and standard deviation o = 1 isknown as the standard normal distribution.
• The standard score or z-score is a distance between a given value X and the mean. It is a measure of relative standing. It is a standard deviationvalue.
• In statistics, a population includes all members of a defined groupthat we are studying for data-driven decisions.
• A sample is a set selected from a population by a defined procedure.
• A percentile is a measure of relative standing. It is a descriptivemeasure of the relationship of a measurement to the rest of the data.