Two-sided alternative hypotheses

Reference no: EM13103760

"An investigator wished to determine whether epinephrine has the effect of elevating plasma cholesterol levels in humans. Twelve adult males were selected and given both a placebo and the drug. Blood samples were taken following injection of the placebo and again after injection of epinephrine. Analysis of the blood samples resulted in the following data:

Cholesterol Levels (mg/100mL)

subject placebo epinephrin

1 178 184
2 240 243
3 210 210
4 184 189
5 190 200
6 181 191
7 156 150
8 220 226
9 210 220
10 165 163
11 188 192
12 214 216

(a) Formulate an appropriate statistical model, defi ning all the terms. State the null and two-sided alternative hypotheses which reflect the research question of interest.

(b) Enter the data into R, and calculate the means for placebo and epinephrine. Find a 95% confi dence interval for the mean difference in cholesterol levels between the placebo and epinephrine. Use the confi dence interval to test your null hypothesis.

Reference no: EM13103760

Questions Cloud

Determine the ucl and lcl of the p chart : In an organization, 10 samples of 50 items each were collected to check for defect. The result is provided in the table.

Population mean concentration of uric acid : Find a 95% confidence interval for the population mean concentration of uric acid in this patient's blood. (Round your answer to two decimal places.)

Academic approach-statistics-probability : A City Survey states that 70 percent of all business owners favor increasing the parking fees. The city has commissioned a random sample of n = 100 business owners.

Find that coefficient of kinetic friction : A merry-go-round (carousel) with a moment of inertia of 594 kg·m2, is initially rotating horizontally at 2 rad/s about a frictionless axis through its center.

Two-sided alternative hypotheses : Formulate an appropriate statistical model, defi ning all the terms. State the null and two-sided alternative hypotheses which reflect the research question of interest.

Determine the appropriate reoder point : A company's total output for DVDs is 5,000 units (20 per day), and the cost per unit is $60. The total time between date order and date of receipt is 5 days.

Determine the average waiting time in line : Since the deregulation of the airline industry, fierce competition has forced Global Airlines to reexamine their operations for efficiency and economy. As part of their campaign to improve customer service, they have focused on passenger check-in ope..

Probability of graduate degrees : A firm plans to hire 100 employees during the year. It expects that 25 of these employees will obtain graduate degrees within the next 5 years of being hired.

Explanation for the hpi processes : On an airplane, you find yourself sitting next to an executive whose goodwill is important to you either as a client or as a senior leader of your company.

User Account

All Pages