Start Discovering Solved Questions and Your Course Assignments
TextBooks Included
Active Tutors
Asked Questions
Answered Questions
The president of a large accounting firm is required to send employees back to school each year to catch up on the latest changes to tax laws
Why do you use N-1 rather than just N when calculating the standard deviation as estimated from a sample? How does the t-statistic differ from the z-statistic?
A real estate agent claims that there is no difference between the mean household incomes of two neighborhoods
You have noticed that more primary children are becoming obese and physical fitness has been terminated in the elementary schools.
Recall that the cigarette industry requires that models in cigarette ads must appear to be at least 25 years old.
Thirteen randomly selected volunteer A,B,...,M are administered a pill designed to lower systolic blood pressure with the following results.
For the following, which type of t-test is required? A) Studying the effects of a memory drug on Alzheimer's patients, testing a group of patients
A new weight watching company, FatZilla, advertises that those who join their program average at least a 10 pound weight loss during the first two weeks
Write the hypotheses that would be used to test the hypothesis that the production before replacing the bearings was greater than after replacing them.
You work at a major regional hospital and you are concerned about waiting times in the emergency room. This file contains data on some random samples of patient
Test H0: µ1 = µ2; H1: µ1 > µ2 at a = 0.05, when 1 = 75, 2 = 72, s1 = 3.3, s2 = 2.1, n1= 6, n2= 6. Assume equal variances.
The mid-distance running coach, Zdravko Popovich, for the Olympic team of an eastern European country claims that his six-month training program
Suppose that you wish to compare the characteristics of tuberculosis meningitis in patients infected with HIV and those who are not infected.
A study of cats and dogs found that 25 of 50 cats and 37 of 60 dogs slept more than 10 hours per day. At the .05 level of significance
A student is interested in whether students who study with music playing devote as much attention to their studies as do students
Describe three experiments that would use the three different t-tests
The probability of Type I error is referred to as the significance level of the test.
A study in The Journal of the American Medical Association describes the effects of diets on weight control.
Find examples in the research that utilize the independent and dependent t-tests that are used to answer a question. Find the t value and its associated p value
Review the SPSS output file (see attachment) which reports the results of the between-group (independent group) one-way ANOVA
Draw the statistics as a histogram. Do they resemble the Normal Distribution?
The average length of time for students to register for classes at a certain college has been 50 minutes. A new registration procedure is being tried.
A psychiatrist hires you to study whether her clients self-disclosed more while sitting in an easy chair or lying down on a couch.
Gender (1=female; 2=male), Age, Height (in meters), Weight, before and after (in kilograms), Cholesterol level, before and after
A hypothesis test is a process that uses population parameters to test a claim about about a sample statistics.