Quen: In a pharmaceutical study, two drugs (A and B) and a placebo are to be compared for effects. Fifty people are to be used in the study, of whom 20 are to receive drug A, 20 receive drug B, and the remainder receive the placebo. Assuming the people are numbered 1 to 50, how many different ways could the assignment of the drugs and placebo be made?

Quen: In a pharmaceutical study, two drugs (A and B) and a placebo are to be compared for effects. Fifty people are to be used in the study, of whom 20 are to receive drug A, 20 receive drug B, and the remainder receive the placebo. Assuming the people are numbered 1 to 50, how many different ways could the assignment of the drugs and placebo be made?

Name: Quen: In a pharmaceutical study, two drugs (A and B) and a placebo are
Uploaded: 2024-03-20T07:07:37.000Z
Channel: Bartleby
Description: Quen: In a pharmaceutical study, two drugs (A and B) and a placebo are to be compared for effects. Fifty people are to be used in the study, of whom 20 are to receive drug A, 20 receive drug B, and the remainder receive the placebo. Assuming the peop

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

See similar textbooks

Related questions

Q: A survey of 100 doctors revealed that 2 out of every 5 doctors recommended Brand M deodorant. Based…

Q: A company held a blood pressure screening clinic for its employees. The results are summarized in…

A: d) The blood pressure with different age groups is given.

Q: What type of association would you expect in each of the cases below (positive, negative, or none)?…

A: To determine relationship in the given statements.

Q: “Snoqualmie” is a name shared by a waterfall and a tribe of Native Americans. In a study of the…

A: The provided data is,

Q: I have a 5 x 5 factorial between subjects design. Answer the following questions. a. How many…

A: Definition: Factorial Design An experiment that consists of multiple factors is called factorial…

Q: There are four major types of blood: A, B, AB, and O. Suppose 38% of a certain population has Type…

A: The blood types are A, B, AB and O.

Q: A distributor receives a shipment of 60,000 porcelain figurines. The figurines are packed in 500…

A: It is essentially inferred that the sample mean (i.e., the mean number of damaged figurines in the…

Q: Make the two given tables into one table by combining men for capital punishment into one group, men…

A: Men With Persuassion No Persuassion For capital punishment 4 13 Against capital…

Q: Many young men in North America and Europe (but not in Asia) tend to think they need more muscle to…

A: It is given that,Sample mean = 2.35.Population standard deviation, sigma is 2.5.The sample size, n…

Q: Twenty-five volunteer athletes participated in a study of cross-disciplinary athletic abilities. The…

A: If a regression line will be generated to predict the GOALMADE, using weight, height and dash100,…

Q: In a survey of working parents (both parents working), one of the questions asked was "Have you…

A: Given: n1 = 200 n2 = 200 P1 = 29200 = 0.145 P2 = 24200 = 0.12 Formula used: Z-test =…

Q: pretend you actually ran the study you came up with. Make up the results (the test statistic values,…

A: Consider two groups of pupils, one receives special teaching while the other group does not receive…

Q: What is the test statistic and the p-value

A: here use matched pair t test because sample remain same but treatment on same sample performed

Q: A doctor wanted to study the effect of four different treatments on mental health. A group of 100…

Q: A campus researcher wanted to investigate the factors that affect visitor travel time in a complex,…

A: It is required to identify the suitable method of analyzing the data.

Q: Suppose that 50 men with a family history of prostate cancer participate in a study. First, the…

A: (a) The cut-off value is set at 2. Based on the cut-off value as 2, the two-way table is,

Q: Three students scheduled interviews for summer employment at the Brookwood Institute.In each case…

A: From the given information it can be seen that there are 3 students scheduled interviews for summer…

Q: Should cell phone use be banned by drivers? 188 people took part in a survey. The answers are…

A: Given: 188 people took part in a survey. The answers are classified by the gender of the respondent…

Q: Number of participants Had nausea 95 Had anxiety 77 Had both nausea and anxiety 58 Construct a Venn…

A: Let N be the number of participants had nausea and A be the number of participants had anxiety.…

Q: Residents in a city are charged for water usage every three months. The water bill is computed from…

A: INTRODUCTION : HISTOGRAM: The Histogram is often useful to represent a frequency distribution…

Topic Video

Question

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

SEE SOLUTION Check out a sample Q&A here

Step 1

VIEW

Step 2

VIEW

Step by step

Solved in 2 steps

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

$Research Design Formulation$

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, probability and related others by exploring similar questions and additional content below.

Similar questions

Determine whether the study is an experiment or an observational study, and then identify a major problem with the study. A sociologist has created a brief survey to be given to 2000 adults randomly selected from the U.S. population. Here are her first two questions: (1) Have you ever been the victim of a felony crime? (2) Have you ever been convicted of a felony? This is an observational study because the researcher does not attempt to modify the individuals. What is a major problem with the study? O A. The responses will be voluntary, which will lead to a high chance of bias. O B. The sample includes only U.S. adults. O C. There is no blinding or replication, which has a high chance of leading to bias. O D. Individuals convicted of a felony are more likely to not answer the second question honestly.
. A school psychologist wants to test the effectiveness of a new method for teaching reading. She takes 500 first grade students from District 12 (all with the same teacher), and randomly assigns half of them to the traditional method and half of them to the new method for teaching reading. The students are not told which teaching method they are being taught with. At the end of the year, she obtains all scores on a reading achievement test, and looks for any differences between the two groups. a. What is the research objective? b. What type of study was used? Give the exact name. c. Does this study make use of random sampling, random assignment, both, or neither? How do you know? d. What are the explanatory and response variables? Explanatory Variable: Response Variable: e. What are the treatments? e. Was blinding used? If so, how?
Investigators enrolled 100 diabetics without eye disease in a follow-up study. The results of the first 3 years were as follows: Year 1:0 cases of eye disease detected out of 92: 8 lost to follow-up Year 2: 2 new cases of eye disease detected out of 80; 2 had died; 10 lost to follow-up Year 3: 3 new cases of eye disease detected out of 63; 2 more had died; 13 more lost to follow-up. Find the person-time incidence rate.
Classify the experiments according to their experimental designs. Some designs may be used more than once.
Dorinda is in second grade. She asks 6 of her classmates if they like to wear friendship bracelets. Four of her classmates said yes. Based on her findings, would it be reasonable to assume that about 2/3 of the pupils at her school (which has kindergarten through fifth grade) would also like to wear friendship bracelets? Why or why not?
In an experiment with two factors, A and B ,what is the purpose of doing a multiple comparison if a. only the Factor A effect is significant? b. both Factor A and B effects are significant, but the interaction is not? c. the interaction between A and B is significant?
1) The data below come from a study that investigated the usefulness of MRI to diagnose breast cancer. Of the 650 women in the study, 13 had breast cancer, and the MRI exam detected breast cancer in 12 of these women. Of the 637 women who did not have breast cancer, the MRI correctly identified that no cancer was present for 547 of them. The accompanying table summarizes this information. Breast Cancer Present Breast Cancer NOT Present Total MRI Indicated Breast Cancer 12 90 102 MRI Did NOT Indicate Breast Cancer 1 547 548 Total 637 650 Suppose that an MRI exam is used to decide between the two hypotheses. HO: A woman does not have breast cancer. Ha: A woman has breast cancer. A. In the context of this problem explain what a Type I error would mean B. In the context of this problem explain what a Type II error would mean.
Students in two elementary school classrooms were given two versions of the same test, but with the order of the questions arranged from easier to more difficult in version A and in reverse order in version B. Randomly selected students from each class were given version A and the rest given version B. The results are Version A:n1=31,x¯1=83,s1=4.6Version B:n2=32,x¯2=78,s2=4.3 Use a 0.01 significance level to test the claim that Version A is easier than version B.(Make sure you have the four steps shown similar to the examples that I gave) Assume that the two independent samples have been randomly selected from normally distributed populations. Instruction: 1) Must contains 4 steps as shown on the instructor's video. 2) Must identify whether the null hypothesis or the alternative hypothesis is the claim. 3) When doing the calculation, do not calculate standard error. 4) When finding the p-value, must show whether it is left-, right-, or two-tailed. 5) When drawing conclusion, must…
Explain correctly.
v Question Completion Status A Moving to another question will save this response, Question 3 A single coin is tossed. What are the odds of tossing a tail? Answer as Xx For example, 2:3
Hypnosis. A sample of 100 people was separated into children and adults. The members of each group were randomly assigned to two different hypnosis exercises. The responses of each person were recorded at the completion of the experiment
A. Headache Pain : There are many over-the-counter pain relievers. By the end of the semester, you have a tremendous headache and are looking for the most effective pain relief available. You conduct a study comparing the three most popular pain relievers and a placebo to see which work best. You use only subjects with headaches and record the amount of time (in minutes) it takes for their headache to go away after they receive the medication. You randomly assign 60 participants to one of the four conditions using a double- + blind procedure. (Use a = Placebo 70 Drug A 30 Drug B 10 Drug C 10 30 60 40 20 50 40 10 10 60 30 40 10 10 40 30 30 30 30 30 10 40 20 20 20 60 40 20 30 50 30 30 10 30 30 20 20 60 20 10 10 20 40 20 30 20 50 20 10 40 20 30 30 State the hypotheses Critical value and df Test statistic