________ service packages are of the one-size-fits-all variety

Economic theory suggests that rational customers will collect information only to the point at which:

A) the marginal benefit of obtaining the information in terms of incremental value to making a choice equals the marginal cost. B) the total benefit of obtaining the information equals the total cost after purchasing the product. C) they can no longer pay for syndicated information. D) the marginal benefit of obtaining the information in terms of incremental value to making a choice is less than the marginal cost.

The mean squared deviation of all the values from the mean is called the ________

A) variance B) range C) median D) mean E) geometric mean