A pharmaceutical company makes tranquilizers. It is assumed that the distribution for the length of time they last is approximately normal. Researchers in a hospital used the dmg on a random sample of nine patients. The effective period of the tranquilizer for each patient (In hours) was as follows: 2.7; 2.8; 3.0; 2.3; 2.3; 2.2; 2.8; 2.1; and 2.4.
a. i.
ii. sx=________ .
iii. n _______
iv. n - 1 _________
b. Define the random variable X In words.
c. Define the random variable
d. Which distribution should you use for this problem? Explain your choice.
e. Construct a 95°c confidence Interval for the population
i. State the confidence interval.
ii. Sketch the graph.
iii. Calculate the error bound.
f. What does It mean to be ‘95% confident in this problem?
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- Glencoe Algebra 1, Student Edition, 9780079039897...AlgebraISBN:9780079039897Author:CarterPublisher:McGraw Hill