Does a new diet plan help people lose weight? Twenty people were weighed before starting a 3-month diet program and again after they completed the program. The change in weight was found by taking, before weight minus after weight. If the test statistic was 3.45, what is the correct conclusion? O The average weight loss for all people on this plan is 3.45 pounds. We do not have statistically significant evidence that the population mean weight loss was less than zero. We have strong statistically significant evidence to show the population mean weight loss was greater than zero.

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