In: Statistics and Probability
Often, frequency distributions are reported using unequal class widths because the frequencies of some groups would otherwise be small or overlarge. Consider the following data, which represent the daytime household temperature the thermostat is set to when someone is home for a random sample of 736 households. Determine the class midpoint, if necessary, for each class and approximate the mean and standard deviation temperature.
Temperature Frequency
61-64 34
65-67 61
68-69 200
70 191
71-72 123
73-76 80
77-80 47
Class Class Midpoint
61-64 __
65-67 __
68-69 __
70 __
71-72 __
73-76 __
77-80 __