Jacy wants to determine how age and height are related to shoe preference in her town. she selects a simple
random sample of 25 individuals taller than five feet seven inches from the 18-to 21-year age group and records
their age, height, and shoe preference (tennis shoes, high-heeled shoes, sandals). she also selects an independent
simple random sample of 30 individuals shorter than five feet seven inches from the 35-to 45-year age group and
records the same information. which is the most important observation about jacy's plan?
her samples are too small.
she should have used equal sample sizes.
the plan is well conceived and should serve the intended purpose.
she will be unable to tell whether a difference in shoe preference is related to a difference in age or to a
difference in height.
she should have selected the two age groups randomly instead of choosing them specifically.