Answer:
D. survey thirty 6th grades
Step-by-step explanation:
An exponential model should be used to represent the <em>n</em>th pattern. The squares do not have a constant growth pattern, but rather they are growing exponentially, because the pattern they are growing at is 2,4,8. A constant pattern would be 2,4,6. I would show the work on a linear graph - plotting the lines on the graph at 1,2, 2,4 and 3,8 your arrow would be curved and pointed up.
Answer:
496
Step-by-step explanation:
I am assuming that there are options lacking. The average score, due to the Law Of Big Numbers, using a big enough sample will be close to the mean of the random variable. Thus the mean of the average scores will be close to 496 if the process is done many times.
The answer is 8
Because 20%*40=8
Answer:
The minimum sample size is needed to be 95% confident that the sample mean is within 5 minutes of the true population mean is 40.
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 the margin of error M as such
In which is the standard deviation of the population and n is the size of the sample.
If the population standard deviation is 16 minutes, what minimum sample size is needed to be 95% confident that the sample mean is within 5 minutes of the true population mean
This is n when . So
The minimum sample size is needed to be 95% confident that the sample mean is within 5 minutes of the true population mean is 40.