Question: In a pharmacological study, 12 rats were randomly allocated to receive an injection of amphetamine at one of two dosage levels or an injection of

In a pharmacological study, 12 rats were randomly allocated to receive an injection of amphetamine at one of two dosage levels or an injection of saline. Shown in the table is the water consumption of each animal (ml water per kg body weight) during the 24 hours following injection.39

(a) Calculate the regression line of water consumption on dose of amphetamine, and calculate the residual standard deviation.
(b) Construct a scatterplot of water consumption against dose.
(c) Draw the regression line on the scatterplot.
(d) Use linear regression to test the hypothesis that amphetamine has no effect on water consumption against the alternative that amphetamine tends to reduce water consumption. (Use a = 0.05.)
(e) Use analysis of variance to test the hypothesis that amphetamine has no effect on water consumption. (Use a = 0.05.) Compare with the result of part (d).
(f) What conditions are necessary for the validity of the test in part (d) but not for the test in part (e)?
(g) Calculate the pooled standard deviation from the ANOVA, and compare it with the residual standard deviation calculated in part (a).

Dose of amphetamine (ml/kg) 125 22.91184 134.5 162.1 124.465.1 184.1 1694 99.6 154.9105.389.0 2.5

Step by Step Solution

★★★★★

3.36 Rating (171 Votes )

There are 3 Steps involved in it

1 Expert Approved Answer

Step: 1 Unlock

a The intercept and slope of the regression line are b 0 15695 b 1 2358 The fitted regression line i... View full answer

Question Has Been Solved by an Expert!

Get step-by-step solutions from verified subject matter experts

Step: 2 Unlock

Step: 3 Unlock

Document Format (1 attachment)

886-M-S-L-R (8134).docx

120 KBs Word File

Students Have Also Explored These Related Statistics Questions!

It is thought that stress may increase susceptibility to illness through suppression of the immune system. In an experiment to investigate this theory, 48 rats were randomly allocated to four...

In a report of a pharmacological study, the experimental animals were described as follows8: "Rats weighing 150 10 gm were injected . . ." with a certain chemical, and then certain measurements were...

A pain-killing drug was tested for efficacy in 50 women who were experiencing uterine cramping pain following childbirth. Twenty-five of the women were randomly allocated to receive the drug, and the...

Can someone explain how might bias have affected these results. From the discussion paragraph, I found these. Our findings could be related to early effects of bolus epidural magnesium. Continuous...

As you review these studies, think about the differences in the study designs and approach to answering their respective research questions. Think about the strengths and limitations of each design....

Ashford 5: - Week 4 - Assignment Principles of Effective Intervention There are four general principles of effective intervention that have become organizing concepts of community corrections. They...

Q: Could there have been bias in the selection of the study subjects? How likely might selection bias affect the data? --> when I read the article, it doesn't sound like there is a bias in the...

Excelsior College PBH 321 CRITICAL EYE ON RESEARCH IN EPIDEMIOLOGY By the end of this activity, you will be able to illustrate the purposes, designs, weaknesses, and relevance of a randomized drug...

duction A colleague of mine recently remarked that 'much social science consists of t a t y a r e u e o r n o : f r h a p s t h e m o s t b i o u s f i n g m y a n d mo t h e r c o l l d have told us...

Identify the process evaluation article that you chose and explain why you selected this example. Describe the purpose of the evaluation, the informants, the questions asked, and the results of the...

Consider the following two periods panel data model: Wageit = Bo + do D2 + BEducit + B Expit +B3Female; + ai + uit, t = {1,2}, where D2 is a dummy variable which equals to one in period 2 and zero in...

Maureen, a resident of Canada, has the following sources of income and losses for tax purposes for the current year. Employment income$60,000 Business X profit3,000 Business Y loss7,000 Interest...

ans Chrome File Edit View History Bookmarks Profiles Tab Window B 1 48% 2 9 8 Fri Mar 7 11:25:25 AM X Da Da Da college sem world hwa khan + X G 2%...

A pen company averages 1.2 defective pens per carton produced (200 pens). The number of defects per carton is Poisson distributed. a. What is the probability of selecting a carton and finding no...

Suppose that X1, . . . , Xn form a random sample from the exponential distribution with unknown parameter . Construct an efficient estimator that is not identically equal to a constant, and determine...

Prove that if X has the t distribution with one degree of freedom, then 1/X also has the t distribution with one degree of freedom.

Consider again the conditions of Exercise 19, and let denote the M.L.E. of . a. Use the delta method to determine the asymptotic distribution of 1/. b. Show that 1/ = n, and use the central limit...

1 2 . 1 2 LAB * : Warm up: Online shopping cart ( Part 1 ) ( 1 ) Build the ItemToPurchase class with the following specifications: Attributes ( 3 pts ) item _ name ( string ) item _ price ( float )...

Consider the following information about three stocks; If your portfolio is invested 40 percent each in A and B and 20 percent in C, what is the portfolio expected return? The variance? The standard...

The NuPress Valet Co. has an improved version of its hotel stand. The investment cost is expected to be $72 million and will return $13.5 million for 5 years in net cash flows. The ratio of debt to...