"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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Answer:
We need an SRS of scores of at least 153.
Step-by-step explanation:
We have that to find our level, that is the subtraction of 1 by the confidence interval divided by 2. So:
Now, we have to find z in the Ztable as such z has a pvalue of .
So it is z with a pvalue of , so
Now, find M as such
In which is the standard deviation of the population and n is the size of the sample.
How large an SRS of scores must you choose?
This is at least n, in which n is found when . So
Rounding to the next whole number, 153
We need an SRS of scores of at least 153.