4 Classroom 2:47 AM Mon Dec 13 1? 86% - i docs.google.com Given the following table. Calculate the mean number of children per family for the sample. * Number of children Number of families 0 8 I I6 2 22 3 I4 4 o 5 4 6 2 O 1.91 O 2.47 O 3.14 O 2.19 Referring to the data set below, what is the mean of the set? * 4.00 1.47 2.06 2.36 3.74 3.43 3.78 Referring to the data set below, what is the range of the data set? * 4.00 1.47 2.06 2.36 3.74 3.43 3.78 4 Classroom 2:47 AM Mon Dec 13 1? 86% - i docsgooglecom Which of the following would be affected the most if there is an extremely large value in the data set? * Mode Mean Median Frequency 0000 Given the following table, calculate the standard deviation. * Number of children Number of families 0 l 2 3 I4 4 s 6 What will happen to the mean if each observation is increased to half the value of the mean? * O The mean will double 0 The mean will be the median O The mean will decrease by half its value O The mean will increase to half its value p Marina sampled every 7th member of the population in her studies. What type of W 4 Classroom 2:47 AM Mon Dec 13 1? 86% - i docs.google.com Given the following stem-ond-leof plot/diagram: 1 |03 2 |224 3 |12333 4 |ll222256 5 |3356 6 |24 7 |3 The number occurred the most is It is the process of selecting a sample from a large group based on the principle of chance. * O Non-probability Sampling O Sampling O ProbabilitySampling 0 Simple Random Sampling When the correlation coefficient, r, is close to one: * 0 there is no relationship between the two variables O there is a strong linear relationship between the two variables O it is impossible to tell if there is a relationship between the two variables 0 the slope of the regression line will be close to one Which of the followinWs an extremely large 2:48 AM Mon Dec 13 1? 86% - i docs.google.com Marina sampled every 7th member of the population in her studies. What type of sampling would she be using? * O Stratified O Cluster 0 Random 0 Systematic The following data lists eight different investment amounts (X) and the amount of interest they earned (Y): * ) P1000 P2000 P3000 P 10000 P500 P5000 Y P50 P100 P150 P500 P25 P250 What is the best estimate for the regression coefficient r between X and Y? O rwill be positive and close to zero 0 rwill be positive and close to one Q r will be exactly one Q rwill be negative The students were subdivided into 4 different categories according to major. classification, gender and national origin. A proportionate number from each group was sampled. * 0 Random 0 Systematic O Stratified O Cluster It refers to an attribute or characteristic of a sample. *