A researcher believes that women today weigh less than in previous years. To investigate this belief, she randomly samples 41 adult women and records...

A researcher believes that women today weigh less than in previous years. To investigate this belief, she randomly samples 41 adult women and records their weights. The scores have a mean of 111 lbs. and a standard deviation of 12.4. A local census taken several years ago shows the mean weight of adult women was 115 lbs.Refer to Exhibit 13-1. The df for determining tcrit =A. 41B. 40C. 39D. need more info

A researcher believes that women today weigh less than in previous years. To investigate thisbelief, she randomly samples 41 adult women and records their weights. The scores have amean of 111...