Edexcel As Level Maths Statistics |47 Questions| With Correct Answers.

Simple Random Sample {Ans: A sample where every sampling unit has an equal chance of being chosen}Sampling Frame {Ans: A list of individually named or numbered sampling units}mutually exclusive {Ans: Events have no outcomes in common, they can't happen at the same time}Disadvantages of Opportunity Sampling {Ans: Unlikely to provide a representative sample Highly dependent on individual researcher}Continuous Variable {Ans: A variable that can take any value in a given range}Disadvantages of Stratified Sampling {Ans: Sample accuracy reflects the population structure guarantees proportional representation of groups within a population}Advantages of a census {Ans: It should give a completely accurate result}independent {Ans: When one event has no effect on another}Advantages of Quota Sampling {Ans: Allows a small sample to still represent the whole population No sampling frame required Quick, easy and inexpensive Allows for easy comparison between different groups in the population}Correlation {Ans: A measure of the linear relationship between two variables}regression line {Ans: a line of best fit, y = a+bx}critical region {Ans: the area in the tails of the comparison distribution in which the null hypothesis can be rejected}bivariate data {Ans: Data which has pairs of