2.7 Data points within various Standard Deviations 74 60 63 64 65 77 65 65 69 82 52 91 61 84 81 77 87 70 84 80 57 58 60 57 70 90 82 74 75 70 98 98 85 82 63 61 84 91 95 54 81 85 86 Mean = 67.3 and Standard Deviation = 24.7 a. The range within One Standard Deviation is between and and the percentage within is b. The range within Two Standard Deviations is between and and the percentage within is c. The range within Three Standard Deviations is between and and the percentage within is (round to 1 decimal place)

For the variable AGE, calculate the standard deviation. Respondent Marital Status Age Attitude on Abortion (high score= strong opposition) A Single 18 10 B Single 20 9 C Widowed 21 8 D Married 30 10 E married 25 7 F Married 26 7 G Divorced 19 9 H Widowed 29 6 I Divorced 31 10 J Married 55 5 K Widowed 32 4 L Married 28 3 M Divorced 23 2 N Married 24 1 O Divorced 32 9

Calculate the mean and standard deviation for the two variables separately.

Data set: 139 173 198 214 175 193 166 220 122 177 119 203 175 147 250 205 216 214 260 216 256 208 185 150 204 216 261 320 236 229 138 177 132 191 356 236 316 246 212 305 289 144 396 296 171 230 324 232 46 188 164 204 109 87 218 89 199 143 265 237   Find  frequency and relative frequency draw relative frequency  Use the empirical rule to estimate the percentages of observations that lie within one, two, and three standard deviations to either side of the Use the data to obtain the exact percentages of observations that lie within one, two, and three standard deviations to either side of the Compare your answers in parts (b) and (c)