Question

a) What do you mean by confidence interval ?
b) Whiy median is used when there are extreme scores in a distribution.
c) Describe the data with appropriate central tendency & Variabilitys-

No. of students
80, 78, 70, 55, 35, 23, 13, 10

Marks
0-80 10-80
20-80
30-80
40-80
50-80
60-80
70-80
​

Answer 1

A confidence interval, in statistics, refers to the probability that a population parameter will fall between two set values for a certain proportion of times. Confidence intervals measure the degree of uncertainty or certainty in a sampling method.