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Multiple Choice Questions 03. The formula for converting a value to a 2-(*)/ 04. The area under the curve of a standard normale Can have any value Can have any positive value Is equal to 1 Ranges from minus I to plus 3.4.1 Multiple Choice Questions 03. A compound event is An event that comprises mutually exclusive simple events An event with a probability An event with a probability of An event combining two or more simples 02 Aand Awe complementary events, and Ais 0.23 then ik 1.50 4.00 0.75 THINKI Multiple Choice Questions Q1. The notation for the multiplication rule is PA or B) PA and B) PA) PS) 02. Two events are dependenti They are caually related - ia. A causes Be B Comes A They cannot occur at the same time The occurrence of one is not related to the currence of the other The occurrence of one affects the probability of occurrence of the other An even TUTORIAL 01: Multiple Choice Questions QL. A woman gives birth to twins. For a study on the birth of twins, the result of a boy being bor first and a girl being bor second is A simple event A sample space An unusual event 02. An event is unlikely if its probability is less than 0.75 0.50 0.25 Multiple Choice Questions Multiple Choice Questions Q3. The term 2 is notation for The square of the variance of a sample The square of the standard deviation of a sample - ie, the variance The square of the standard deviation of a population The square of the variance of a population 04. For data with a bell-shaped distribution: About 95% of values are within 1 standard deviation of the mean About 95% of values are within 2 standard deviations of the mean About 68% of values are within 2 standard deviations of the mean About 68% of values are within 3 standard deviation of the mean Multiple Choice Questions 05. Az score is The sum of the data values divided by the number of data values The square of the standard deviation The number of SDs a data value is above or below the mean The mid point of the data set 06. A percentile is: One of 99 measures that divide data into 100 equal-sized groups One of 100 measures that divide data into 100 equal-sized groups A fraction expressed in decimals A fraction expressed od in percentages Multiple Choice Question 07. The five number summary comprises The minimum, the maximum, the mean, the median and the mode The range, the midrange value and the three quartiles The minimum value, the maximum value and the three quartiles The mean, the median and the three quartiles 08. For the 25th percentile: The data value is 25 standard deviations below the mean The data value is standard deviation below the mean About 25% of data values are above it and 75% are below it About 23% of data values are below it and 75% are above it Multiple Choice Questions QI. Descriptive statistics Replace calculations with sentences and real-life examples Use data from the whole population for making calculations Focus on summarising and measuring key characteristics of data Involve the making of generalisations from original data 02. An important advantage of the mean is that: Sample means from the same population are relatively stable It is not affected by outliers It is the easiest to calculate of the various measures of centre It is always the same as the median