. True of False question (# 10 / M, 41 814, $8#104) 1. The coefficient of variation is calculated by dividing the mean by the number 2. The SD belong to the position dispersion 3. A distribution is said to be normal when the three measures of central tendency are different 4. A non-sampling error is more serious than a sampling error because the chances of making this error do not decrease as the sample size increases 5. The median is the middle term of an ordered distribution whereas the mode is the most frequently occurring term of the distribution( ) 6. The IQR measures the difference between the upper quartile and the lower quartile( 7. The midspread_ which measures the variation amongst the middle 50% of the distribution, is referred to as the correlation( ) 8. The population SD and the sample SD is the same. ( 9. Mode is affected by extreme values. ( 10. When using Passoche Price Index, the fixed time of Q is given time. ( . Fill the blank question (# 30 4:2, 4214, *8# 30 4) 1. Reasons for sampling instead of looking at the entire population are L and 2. There are three basic sampling methods are { ) sampling , ( ) sampling and ) sampling 3. [ ) probability is the probability of event A not occurring 4. the probability of an event occurring will always be between( ) and ( 5. There are different types of the correlation coefficients, but due to the limitations, we have learned 2 of them: Pearson ) correlation coefficient and Spearman ( correlation coefficient 6. The most common types of distributions are ( ) distribution, ( ) distribution, Poisson distribution and ( ) distribution. 7. IQR means 8. The median can be found graphically by _ ) curve 9. In business the most common index number is the _ ) index. 10. When finding the regression line, there are many types lines, but the most logical thing is the { ) ( ) method 11. It is different that whether the value is population or ( ) . 12. ( ) ( )is the ( ) of the price of that product in the current period to the price of the same product in the base period. 13. The most common weighted index is the { ) index and ( ) index 14. The smaller the ( ) the more accurate we can consider the measure of central tendency to be 15. When talking about central tendency, these are the three measures of central tendency: ) mean, ( )and (16. The distribution with { ) Modes is called ( ) distribution E. Calculation (40# 12 + , 41 859, 40# 60#) 1. The sampling value below is the mark of one test. Find the IQR, mean, SD. 3 5 6 7 2 7 9 4 2. The financial analyst wants to invest his money into portfolio consisting of 2 shares. To find out the risk of his investment he needs to know the association between them. The historical monthly prices for last year are shown below (a) calculate the value of the coefficient of the correlation (b) find the equation of linear regression. 40 48 54 49 43 47 60 5 6 9 7 8 11 17 3. Three boys (X, Y and Z) were asked to estimate by hand the weights of six objects and arrange them in descending order. The order in which they were placed by each boy is shown below. Decide which two boys are most in agreement. r =1- 6Ed' n(n -1) A B C D E F 3 2 6 5 2 5 4 6 3 2 3 6 5 4. For the following bag of groceries, calculate the Paasche Price Index for June 2017, using June 2016 as the base . Item Pb PE Ob Bread 2. 1 2. 56 20 23 Mushrooms 3.9 4. 99 22 21 ERES 2. 65 3. 1 20 19 milk 1. 79 2. 05 21 24 5. Past experience indicates that 65% of the students finishing the Diploma of Business are likely to apply for courses. Find the probability that out of 8 randomly selected students who have completed their Diploma of Business only 4 of them will apply for courses. P(X = x) = nCr(p)* (q)"- 6. The time taken to paint a room follows a normal distribution with a mean of 5 hours and a standard deviation of 30 minutes . What percentage of painters do you expect to take more than 3 hours and 45 minutes to complete the task Pr(0