A weight loss center provided a loss for 72% of its participants. The center’s leader decides to test a new weight loss strategy on a random sample size of 140 and found weight loss in 78% of...
A weight loss center provided a loss for 72% of its participants. The center’s leader decides to test a new weight loss strategy on a random sample size of 140 and found weight loss in 78% of...
You are studying what proportion of SU students smoke. The null hypothesis is p = 0.27, and the alternative hypothesis is p > 0.27. Your study obtains a p-value of 0.001. ...
3. The American Lighting Company developed a new light bulb that it believes will last at least 700 hours on average. A test is to be conducted using a random sample of 50 bulbs, and a 1% level of...
you are testing the claim of "the big cookie" company that it puts 20 chocolate chips in its big cookies. Many consumers have complained that they have been short changed. Test the claim...
At least half the students at this school carpool to campus. Ho: p = 0.50 and H1: p > 0.50 Ho: p ≠ 0.50 and H1 : p = 0.50 Ho: p > 0.50...
a random sample has 42 values. The sample mean is 9.5 and the sample standard deviation is 1.5. Use a level of significance of 0.02 to conduct a left tailed test of the claim that the population mean...
1. The Coca-Cola company wants to evaluate how consumers will respond to a newly developed energy drink. The key question is whether consumer’s preference for the drink depends on the amount of caffeine...
1. The Centers for Disease Control and Prevention reported a survey of randomly selected Americans age 65 and older, which found that 535 of 1068 women and 421 of 1012 men suffered from some form...
In a survey of 1120 new college graduates 281 had a professional job on graduation day. One year ago the proportion of graduates with a professional job on graduation day was 24%. The setup of the...
Company W is testing a sales software. Its sales force of 500 people is divided into four regions: Northeast Southeast Central West Each sales person is expected to sell...
Vehicles heading west on Front Street may turn right, left, or go straight at Elm Street. The city traffic engineer believes that half of the vehicles will turn left through the intersection....
In polling voter opinions about a school bond issue, two groups randomly sampled the population of river city. both polls have defined their population parameter to be the proportion, null hypothesis,...
Data: Study A: Mean=100.0, standard deviation=10.0, sample score=80, p=.05, Tails of Test= 1 (Low predicted) Study B: Mean=100.0, standard deviation=20.0, sample score=80, p=.01, Tails of...
Let P1, P2, ..., Pn be a p-values of n different hypothesis testing, with H0:Θ∈(H0) and Ha:Θ∈(H1). if H0 is true, then p1,p2,...,pn ~Uniform(0,1) with significant level α. and CR={T <c}, where...
It is hypothesized that 50% of the U.S. population cannot name both of the U.S. Senators from the state in which they reside. A sample of 500 individuals is taken and 218 correctly name both of their...