Learning Materials
Features
Discover
Chapter 9: Q. 2 (page 536)
You are testing that the mean speed of your cable Internet connection is more than three Megabits per second. State the null and alternative hypotheses.
is the null hypothesis and is an alternate hypothesis.
Over 30 million students worldwide already upgrade their learning with Vaia!
All the tools & learning materials you need for study success - in one app.
Get started for free
Toastmasters International cites a report by Gallop Poll that 40% of Americans fear public speaking. A student believes that less than 40% of students at her school fear public speaking. She randomly surveys 361 schoolmates and finds that 135 report they fear public speaking. Conduct a hypothesis test to determine if the percent at her school is less than 40%.
The mean age of De Anza College students in a previous term was years old. An instructor thinks the mean age for online students is older than She randomly surveysonline students and finds that the sample mean iswith a standard deviation of Conduct a hypothesis test.
Suppose that a recent article stated that the mean time spent in jail by a first-time convicted burglar is years. A study was then done to see if the meantime has increased in the new century. A random sample of first-time convicted burglars in a recent year was picked. The mean length of time in jail from the survey was years with a standard deviation of years. Suppose that it is somehow known that the population standard deviation is . If you were conducting a hypothesis test to determine if the mean length of jail time has increased, what would the null and alternative hypotheses be? The distribution of the population is normal.
_______
_______
According to the Center for Disease Control website, in at leastof high school students have smoked a cigarette. An Introduction to Statistics class in Davies County,KY conducted a hypothesis test at the local high school (a medium sized–approximately students–small city demographic) to determine if the local high school’s percentage was lower. One hundred fifty students were chosen at random and surveyed. Of the students surveyed, have smoked. Use a significance level of and using appropriate statistical evidence, conduct a hypothesis test and state the conclusions.
Assume the null hypothesis states that the mean is at least . Is this a left-tailed, right-tailed, or two-tailed test?
What do you think about this solution?
We value your feedback to improve our textbook solutions.
Explanations 
Textbooks 
Exams 
GCSE 
IGCSE 
AS 
A Level 
International A Level 
University Admissions Tests 
Flashcards 
Vaia AI 
Notes 
Study Plans 
Study Sets 
Find a job 
Find a degree 
Student Deals 
Magazine 
Mobile App