"1. The table shows the total annual precipitation for San Diego, California for several years. What is the mean annual precipit
ation to the nearest tenth of an inch? (Enter only the number.)
2. What is the standard deviation rounded to the nearest tenth?
3. In what years was the precipitation more than one standard deviation from the mean?
a) 1999 and 2002
b) 1995, 1998, and 2003
c) 1996 and 1997
d)1995, 1998, and 2002
4. The median for the data to the nearest tenth of an inch is inches."
2. What is the standard deviation rounded to the nearest tenth?
3. In what years was the precipitation more than one standard deviation from the mean?
a) 1999 and 2002
b) 1995, 1998, and 2003
c) 1996 and 1997
d)1995, 1998, and 2002
4. The median for the data to the nearest tenth of an inch is inches."
1 answer:
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Considering the situation described, we have that:
- The appropriate null hypotheses is
.
- The appropriate alternative hypotheses is
.
At the null hypotheses, it is tested if the mean has not been reduced, that is, it still is of 5.2 hours, hence:
.
At the alternative hypothesis, it is tested if the mean has been reduced, that is, it is now of less than 5.2 hours, hence:
More can be learned about hypotheses tests at brainly.com/question/26454209