Start Discovering Solved Questions and Your Course Assignments
TextBooks Included
Active Tutors
Asked Questions
Answered Questions
The 65 students in a class at the University of Soda were given blinded evaluations of pairs of cola drinks.
A hypothesis test is used to test a claim. You get 1.75 as your test statistic and 1.59 as your critical value for a right-tailed test
What data are you going to use? What sections of the data set are you going to use? Make sure it is ratio or interval numerical data you are going to use.
One hundred people were asked which of four brands of Cola they pre-ferred. 20 preferred brand A, 31 brand 8, 28 brand C and 21 preferred brand
The web-based company Oh Baby! Gifts has a goal of processing 95 percent of its orders on the same day they are received.
Data was collected from a random sample of eight men and 10 women currently undergoing treatment for hypertension.
A study has been made to compare the nicotine contents of two brands of cigarettes. Ten cigarettes of Brand A have an average nicotine content of 3.1 milligrams
Sixty-four students in an introductory college economics class were asked how many credits they had earned in college
Since three are less than 30 in the sample and the population standard deviation is unknown then we will be using the T-test.
A random sample of five resulted in the following values: 18, 15, 12, 19, and 21. Using the .01 significance level, can we conclude the population mean
A neurologist wants to detect whether the mean response time for drug-injected rats differs from a control group not injected.
The following sample information shows the number of defective units produced on the day shift and the afternoon shift for a sample of four days last month.
Explain how you decide what statement goes into the null hypothesis and what statement go into the alternative hypothesis.
For a random sample of 10 observations, the sample mean was 12 and the sample standard deviation 3. Using the .05 significance level:
He selects a sample of 15 families, some with only a single insured driver, others with several teenage drivers, and pays each family a stipend
A police officer claims that the average speed of cars on a certain stretch of highway is greater than 70 miles per hour--thus more patrols needed.
How do you know when to perform a "left-tailed" test in a hypothesis-testing situation versus a "right-tailed" or "two-tailed" test?
A bond analyst is analyzing the interest rates for equivalent municipal bonds issued by two different states.
The mean interview time for a standard questionnaire of 31.3 minutes was considered to be excessive so the schedule was revised, yielding a mean interview time
Callaway Golf Company's new forged titanium ERC driver has been described as "illegal" because it promises driving distances that exceed the USGA's standard
In the Big Ten (the NCAA sports league) a sample showed that only 267 out of 584 freshmen football players graduated within 6 years
The National Safety Council reported that 52% of American turnpike drivers are men. A sample of 300 cars traveling southbound on the New Jersey
OHIP records show the average length of stay in Ontario hospitals is 5.4 days. A researcher sampled 125 patient records at US hospitals
One-year sales volume of four similar 20-oz. beverages on a college campus is shown. At a = .05, does this sample contradict the assumption
A study was performed at a university to analyze whether the preference for hamburgers or fried chicken is related to the gender of the student