Statistics 3.3

Consider the following data representing the price of plasma televisions (in dollars). 1301, 1105, 1253, 1211, 1089, 1132, 1282, 1171, 1139, 1260, 1029, 1305, 1189, 1027, 1159, 1208, 1275, 1161, 1143, 1064, 1160 1st class 1014-1063 2nd class 1064-1113 3rd class 1114-1163 4th class 1164-12133 5th class 1214-1263 6th class 1264-1313 calculate the relative frequency of the third class. determine your answer as a simplified fraction

.285 only 6 frequencies fit in that class so take 6 then divide by all frequencies (21) 6/21=.285

Consider the following frequency table representing the distribution of hours students spend on homework in a week. 1st class 10-15 // frequency 3 2nd class 16-21 // frequency 3 3rd class 22-27 // frequency 9 4th class 28-33 // frequency 3 5th class 34-39 // frequency 9 determine the relative frequency for the third class as a simplified fraction

.333 take the frequency of the third class (9) and divide it by all the frequencies (27) 9/27=.333

determine the midpoint for the fourth class fourth class is 0.51-0.58

.545 (.51+.58)/2 = .545

determine the midpoint for the fourth class Fourth class is .54-.62

.58 (.54+.62)/2= .58

consider the following frequency table representing the scores on a test. Choose the interval that contains the score 110.6 is it 30-47, 48-65, 66-83, 84-101, 102-119 1st class 30-47 // frequency 3 2nd class 48-65 // frequency 10 3rd class 66-83 // frequency 14 4th class 84-101 // frequency 11 5th class 102-119 // frequency 4

102-119

consider the following frequency table representing the scores on a test. determine the number of scores between 30 and 101 1st class 30-47 // frequency 3 2nd class 48-65 // frequency 10 3rd class 66-83 // frequency 14 4th class 84-101 // frequency 11 5th class 102-119 // frequency 4

38 add 4th class frequency and all of them below it. 11+14+10+3=38

determine the cumulative frequency for the fourth class 1st class 5.2-5.8 // frequency 4 2nd class 5.9-6.5 //frequency 13 3rd class 6.6-7.2 // frequency 12 4th class 7.3-7.9 // frequency 10 5th class 8.0-8.6 // frequency 8

39 add the 10 frequency from the fourth class and all below them 10+12+13+4=39

Consider the following data representing the price of plasma televisions (in dollars). 1301, 1105, 1253, 1211, 1089, 1132, 1282, 1171, 1139, 1260, 1029, 1305, 1189, 1027, 1159, 1208, 1275, 1161, 1143, 1064, 1160 1st class 1014-1063 2nd class 1064-1113 3rd class 1114-1163 4th class 1164-12133 5th class 1214-1263 6th class 1264-1313 compute the cumulative frequency of the third class

11 add the third class frequency and all below it (1st class and 2nd class) to it to get 11

Consider the following frequency table representing the distribution of hours students spend on homework in a week. 1st class 10-15 // frequency 3 2nd class 16-21 // frequency 3 3rd class 22-27 // frequency 9 4th class 28-33 // frequency 3 5th class 34-39 // frequency 9 determine the relative frequency for the second class as a simplified fraction

.111 take the frequency of the second class (3) and divide it by all the frequencies (27) 3/27=.111

Consider the following data representing the price of plasma televisions (in dollars). 1301, 1105, 1253, 1211, 1089, 1132, 1282, 1171, 1139, 1260, 1029, 1305, 1189, 1027, 1159, 1208, 1275, 1161, 1143, 1064, 1160 1st class 1014-1063 2nd class 1064-1113 3rd class 1114-1163 4th class 1164-12133 5th class 1214-1263 6th class 1264-1313 Determine the frequency of the first class

2 because only 1029 and 1027 fit in that class

Consider the following data representing the price of plasma televisions (in dollars). 1301, 1105, 1253, 1211, 1089, 1132, 1282, 1171, 1139, 1260, 1029, 1305, 1189, 1027, 1159, 1208, 1275, 1161, 1143, 1064, 1160 1st class 1014-1063 2nd class 1064-1113 3rd class 1114-1163 4th class 1164-12133 5th class 1214-1263 6th class 1264-1313 Determine the class width of the classes listed in the frequency table

50 1064-1014= 50 1. find the lower class limit of the first class 2. finding the lower class limit of the 2nd class 3. subtract the lesser value from the greater to determine the first class width 4. recognizing that the class width does not vary from one class to another.

The following data describes percentage of satisfied customers at Touchdown Sporting Goods. Complete the frequency table for this data. 84.884.8, 84.384.3, 83.083.0, 81.981.9, 79.979.9, 83.983.9, 82.282.2, 82.782.7, 84.584.5, 81.081.0, 80.880.8, 80.680.6, 82.482.4, 84.884.8, 78.478.4, 82.282.2, 76.976.9, 76.9 determine the frequency of each class in the table shown 1st class 75.0-76.9 // frequency ?? 2nd class 77.0-78.9 // frequency ?? 3rd class 79.0-80.9 // frequency ?? 4th class 81.0-82.9 // frequency ?? 5th class 83.0-84.9 // frequency ??

2 1 3 6 6

determine the cumulative frequency for the second class 1st class 5.2-5.8 // frequency 4 2nd class 5.9-6.5 //frequency 13 3rd class 6.6-7.2 // frequency 12 4th class 7.3-7.9 // frequency 10 5th class 8.0-8.6 // frequency 8

17 add the 13 frequency from the second class and all below it 13+4=17

determine the class width 1st class 30-47 // frequency 3 2nd class 48-65 // frequency 10 3rd class 66-83 // frequency 14 4th class 84-101 // frequency 11 5th class 102-119 // frequency 4

18 48-30= 17 1. find the lower class limit of the first class 2. finding the lower class limit of the 2nd class 3. subtract the lesser value from the greater to determine the first class width 4. recognizing that the class width does not vary from one class to another.