A researcher wants to know if student scores on an online exam differ from scores of...
A researcher wants to know if student scores on an online exam differ from scores of students who take a paper-and-pencil version of the exam. How could the researcher design a study to test this (briefly explain what research design would be needed and how they might collect the data)? What type of t-test would be most appropriate in this analysis and why? What are the null and alternative hypotheses that would be tested?
Homework Answers
Ans:
We will use two sample t test.
Where 
is population mean score of students who take online exam.
Where 
is population mean score of students who take a paper-and-pencil
version of the exam.
Add Answer to:
A researcher wants to know if student scores on an online exam
differ from scores of...
A professor wanted to determine whether an online homework system improved scores on a final exam....
A professor wanted to determine whether an online homework system improved scores on a final exam. In the fall semester, he taught a class using the online homework system (which meant students did their homework online and received instant feedback about their answers along with helpful guidance). I spring semester, he taught a class without the homework system (which meant students were responsible for doing their homework the old-fashioned way - paper and pencil). The professor made sure to teach...
1) A researcher examines if the reading test scores increase from 5th to 6th grade and...
1) A researcher examines if the reading test scores increase from 5th to 6th grade and from 6th to 7th grade for middle school students. This is an example of which of the following for repeated measures ANOVA: 1- Within-subjects effect 2- Between-subjects effect 3- Interaction effect 4- Simple effect 2) A researcher examines if the reading test scores of ESL students differ based on country of origin. This is an example of which of the following for repeated measures...
The average final exam score for the statistics course is 74%. A professor wants to see...
The average final exam score for the statistics course is 74%. A professor wants to see if the average final exam score for students who are given colored pens on the first day of class is different. The final exam scores for the 16 randomly selected students who were given the colored pens are shown below. Assume that the distribution of the population is normal. 95, 87, 86, 87, 72, 69, 70, 99, 78, 78, 91, 69, 72, 73, 61,...
A researcher wants to determine whether or not consistently studying statistics within two hours of going...
A researcher wants to determine whether or not consistently studying statistics within two hours of going to sleep and power posing improves test scores on statistic exams. She randomly selects three groups of 10 statistics students and administers a statistics exam. Group A, consistently studies statistics within two hours of going to sleep, Group B consistently studies statistics within two hours of going to sleep and incorporates power posing into their study regimen and Group C made no changes to...
Imagine that a researcher has decided to conduct research regarding the 2016 murder of a student...
Imagine that a researcher has decided to conduct research regarding the 2016 murder of a student at Northern Illinois University. The researcher wants to explore how this shooting impacted students, faculty, and parents in light of a previous mass shooting on campus in 2012. What type of research design would be most appropriate? Why?
A researcher wanted to see if live reggae music improved students’ math test scores. He selected...
A researcher wanted to see if live reggae music improved students’ math test scores. He selected a sample of 61 students from his university and gave them a math test. The students then studied for two and a half hours while an acoustic reggae band played quietly. The students then took another math test of the same difficulty. The researcher’s variable was the change in test score for each student — a positive change meant the student did better, while...
4. A researcher conducted a study in which manual dexterity scores of males and females were...
4. A researcher conducted a study in which manual dexterity scores of males and females were compared. Fifty males and fifty females were randomly sampled from a very large general psychology class. The researcher found that females scored higher on the Duell Test of Manual Dexterity than did males. 1) What kind of research design was this? 2) What conclusions might reasonably be drawn from such a study?
A college entrance exam company determined that a score of 21 on the mathematics portion of the exam suggests that a student is ready for college-level mathematics
A college entrance exam company determined that a score of 21 on the mathematics portion of the exam suggests that a student is ready for college-level mathematics. To achieve this goal, the company recommends that students take a core curriculum of math courses in high school. Suppose a random sample of 200 students who completed this core set of courses results in a mean math score of 21.2 on the college entrance exam with a standard deviation of 3.3. Do...
C is for cabbage ~ A researcher wants to know if the head weight of the...
C is for cabbage ~ A researcher wants to know if the head weight of the cabbage is a good predictor for ascorbic acid (vitamin C) content. From a random sample of 60 cabbages, the researcher recorded the ascorbic acid content in milligrams and the weight of the cabbage head in pounds. Head weight is the X variable and Ascorbic acid content is the Y variable in this scenario. R output Coefficients: Estimate Std. Error t...
Subject: Experimental Psychology 2. A researcher wishes to learn whether college students use more slang when...
Subject: Experimental Psychology 2. A researcher wishes to learn whether college students use more slang when speaking with a person their own age than when speaking with an older person. Design a within-subjects experiment to test this hypothesis. Divide your responses into the following sections: 1. Research question, hypotheses, and design, 2. Participants, 3. Measures, and 4. Procedures. As a guide, be sure to include the following: a. Provide a clearly written research question, clearly state your null and alternative...
A professor wanted to determine whether an online homework system improved scores on a final exam. In the fall semester, he taught a class using the online homework system (which meant students did their homework online and received instant feedback about their answers along with helpful guidance). I spring semester, he taught a class without the homework system (which meant students were responsible for doing their homework the old-fashioned way - paper and pencil). The professor made sure to teach...
The average final exam score for the statistics course is 74%. A professor wants to see if the average final exam score for students who are given colored pens on the first day of class is different. The final exam scores for the 16 randomly selected students who were given the colored pens are shown below. Assume that the distribution of the population is normal. 95, 87, 86, 87, 72, 69, 70, 99, 78, 78, 91, 69, 72, 73, 61,...
Most questions answered within 3 hours.
-
Where is the error in this code sequence?
String s1 = "Hello";
String s2 = "ello";...
asked 11 months ago -
Financial data for Joel de Paris, Inc., for last year
follow:
Joel de Paris, Inc.
Balance...
asked 11 months ago -
Consider this reaction:
Al2(SO4)3 (aq)+ BaCl3
(aq) Al2Cl6 (aq)- +
3BaSO4(s) . What is the...
asked 11 months ago -
Suppose that Savneet is considering increasing her
recent random sample from 20 car rentals to 40...
asked 11 months ago -
Trucks arrive at an unloading terminal at an average rate of 120
per hour.
Trucks arrive...
asked 11 months ago -
Why are methanol and ethanol completely soluble in water while
octanol is not very little soluble....
asked 11 months ago -
A facilities manager at a university reads in a research report
that the mean amount of...
asked 11 months ago -
When the CuSO4 is rehydrated by adding water to the anhydrous
compound, is this an endothermic...
asked 11 months ago -
A ray of sunlight is passing from diamond into crown glass; the
angle of incidence is...
asked 11 months ago -
A block of mass 0.249 kg is placed on top of a light, vertical
spring of...
asked 11 months ago -
how do the kidneys compensate in the presences of acidosis
a) trigger hyperventilate
b) reserve acid...
asked 11 months ago -
Question 501 pts
The rental rate of capital to the firm increases. Which of the
following...
asked 11 months ago