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In a clinical study of an allergy drug, 103 of the 202 subjects reported experiencing significant relief from their symptoms. At the 0.05 significance level, test the claim that more than half of all those using the drug experience relief.
a) Identify the claim, and write the claim, the null hypothesis, and the alternative hypothesis in symbolic form.
b) Determine if the test is two-tailed, right-tailed, or left-tailed, and determine the value of the test statistic.
c) Find the P-value, and use it to either reject or fail to reject the null hypothesis.
d) Write your conclusion in a complete sentence in plain English
You flip a coin three times. What is the probability of getting heads on only one of your flips? What is the probability of getting heads on at least one flip
On average 2.4 customers per minute arrive at an airline check-in desk during the peak period. Assume that the distribution of arrivals is Poisson. Then T the time between 2 arrivals will be exponential. What is the probability that a customer will..
This problem related to Basic Statistics and it is about computing the probability of finding a car door on the assembly which takes time between 5 and 10 minutes. The computation has been given in the solution
The researchers planned to use simple linear regression to see if the age at which a baby was first able to crawl could be predicted from the average outdoor temperature six months after each baby's birthdate.
What is the probability of getting- Four or more on a single toss of a fair die and Ace or king on a single pick from a well-shu?ed standard deck of cards?
For each of the following parametric tests, identify the appropriate non-parametric counterpart: This problem belongs to Statistics and it discusses about identifying appropriate non-parametric counter parts for various tests
Independent random samples taken at two companies provide the following information regarding the anual salaries of the employees.
Use this information to make a 95% confidence interval to evaluate true average number of copies made each day at this company.
Either use the p-value approach to hypothesis testing or use the significance level approach with α = .05.
A circus clown at the top of a 60-foot platform is playing catch with another clown on the ground. The clown on the platform drops a ball at the same time as the one on the ground tosses a ball upward at 80 ft/sec.
The next table shows the results of this independent t-test. At the .05 significance level, can we conclude that there is a difference in their mean times? Explain these results to a person who knows about the t test for a single sample but is unf..
1. Construct stem-and-leaf and dotplot displays based on the investment portfolio values in the data file (XR02017) for Exercise 2.17. 2. Construct stem-and-leaf and dotplot displays based on the access times in the data file (XR02018) for Exercise ..
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