A drug company that manufactures a diet drug claims that those using the drug for 30 days will lose at least 15 pounds. You samp
le 30 people who have used the drug and find that the average weight loss was 12 pounds with a standard deviation of 5 pounds.
(a) Test the claim at the .05 significance level.
(b) No claim was made by the company. They took a sample with the above results and ask you to construct a two-sided 95% confidence interval for the population mean.
(a) Test the claim at the .05 significance level.
(b) No claim was made by the company. They took a sample with the above results and ask you to construct a two-sided 95% confidence interval for the population mean.
1 answer:
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<u>Given</u>:
The height of the bird at time t is given by the function
We need to determine the time it takes the worm to be eaten by the bird.
<u>Time taken:</u>
The time can be determined by substituting h(t) = 0 in the function.
Thus, we have;
Switch sides, we get;
Let us solve the equation using the quadratic formula.
Thus, we get;
Simplifying, we get;
The values of t are given by
and
and
and
Since, the value of t cannot be negative, then
Thus, the time taken by the bird to eat the worm is seconds.
Hence, Option B is the correct answer.