1.

A survey of 1,520 Americans adults asked "Do you feel over-loaded with too much information?" The results indicate that 23% of females feel information overload compared to 17% of males. The results are:

Gender

Overloaded male female total

yes 134 170 304

no 651 565 1216

total 785 735 1520

a. Construct contingency tables based on total percentages, row percentages, and column percentages.

b. What conclusions can you reach from these analyses?

2.

The file Utility contains the following data about the cost of electricity (in $) during July 2018 for a random sample of 50 one-bedroom apartments in a large city.

96 171 202 178 147 102 153 197 127 82

157 185 90 116 172 111 148 213 130 165

141 149 206 175 123 128 144 168 109 167

95 163 150 154 130 143 187 166 139 149

108 119 183 151 114 135 191 137 129 158

a. Construct a frequency distribution and a percentage distribution that have class intervals with the upper class boundaries $99, $119, and so on.

b. Construct a cumulative percentage distribution.

c. Around what amount does the monthly electricity cost seem to be concentrated?

3.

Construct a stem-and-leaf display, given the following data from a sample of midterm exam scores in finance:

54 69 98 93 53 74