CHILD DEVELOPMENT PEDAGOGY

Detailed explanation-1: -Since 95% of values fall within two standard deviations of the mean according to the 68-95-99.7 Rule, simply add and subtract two standard deviations from the mean in order to obtain the 95% confidence interval.

Detailed explanation-2: -95% Confidence Interval (95% CI) In general, a confidence interval is the range of values between the LCL and UCL for a specific group. So, the 95% CI for the height of Men is the range of values between 67 inches and 71 inches. The 95% CI for the height of Women is the range of values between 62 inches and 66 inches.

Detailed explanation-3: -Thus in general for a 100(1−)% confidence interval, E=z/2(/√n), so the formula for the confidence interval is ˉx±z/2(/√n). While sometimes the population standard deviation is known, typically it is not. If not, for n≥30 it is generally safe to approximate by the sample standard deviation s.

Detailed explanation-4: -A confidence interval, in statistics, refers to the probability that a population parameter will fall between a set of values for a certain proportion of times. Analysts often use confidence intervals than contain either 95% or 99% of expected observations.