1. Average adult Americans are about one inch taller, but nearly a whopping 25 pounds heavier than they were in 1960, according to a new report from the Centers for Disease Control and Prevention (CDC). The bad news, says CDC is that average BMI (body mass index, a weight-for-height formula used to measure obesity) has increased among adults from approximately 25 in 1960 to 28 in 2002." Boston is considered one of America's healthiest cities - is the weight gain since 1960 similar in Boston? A sample of n=25 adults suggested a mean increase of 17 pounds with a standard deviation of 8.6 pounds. Is Boston statistically significantly different in terms of weight gain since 1960? Run the appropriate test at a 5% level of significance.
1.find critical t value =/-
2. computed statistics=?
3. is there evidence that boston BMI is significantly different than 25
can yu pls solve now
1.find critical t value = +/-2.064 from t table with df=25-1=24 and ...
The solution gives detailed steps on performing a hypothesis testing for mean using t distribution.