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Comparing the response times between 2 cab companies. companies A and B were each called at 50 randomly selected times. the calls to company A were independently made from the calls to company B. company A had a mean response time of 8.5 minutes with a standard deviation of 1.8 min. company B had a mean response time of 5.5 minutes with a standard deviation of 1.6 min. use a 0.05 significance level to test the claim that the mean response time for company A differs from the mean response time for company B.state the null and alternative hypotheses symbolically and identify which represents the claimdetermine whether the hypotheses tailed test is a one tailed test or two tailed test and whether or not to use a z-test or a t-test explainidentify the critical values and identify the rejection regionsus the appropriate test to find the appropriate test statistic. can use technology for this question and resultsbase on test statistic and rejection region the decisioninterpret your decision in context of the original claimconstruct a 95% confidence interval estimate of the difference between the mean response time for Company A and B interpret interval in context of the original claim
Develop a hypothesis to investigate this problem based on the claim of the heat pump manufacturer
You observe the gender of the next 950 babies born at a local hospital. The random variable represents tha number of girls. historically , 49.8% of the babies born are girls?
Calculating the probability of all of them getting to their destination on time. Choose the best answer of the following: This is an example of a Poisson probability experiment
What information is provided by the numerical value of the Pearson correlation? For the following scores, compute the Pearson correlation:
The amounts dispensed by a cola machine follow the normal distribution with a mean of 7 ounces and a standard deviation of 0.10 ounces per cup.
Setup Null and Alternate hypotheses to test if average amount of soda in each can is less than 32 oz. Test the hypothesis using a = 0.05. What can you conclude from all this?
Study is conducted as to whether there is relationship between joggers and consumption of nutritional supplements.
Select the level of significance, and determine critical, ZCR value.
There are 6 different factors labeled as A, B, C, D, E, and F. Given that D=AB, E=-AC, F=-BC, please provide the corresponding 26-3 design table. Also, please write down the complete defining relation and the complete effect alias structure.
Given the following number of hours between breakdowns for 4 machines, are the machines significantly different? If so, how are they different? Which machine is the best?
if two voters are randomly selected for a telephone survey, what is the probability that they one is a Democrat followed by a Republican? Round your answer to 4 decimal places.
The Bureau of Labor Statistics reported that the average annual income of dentists in the year 2005 was $110,000. A sample of 81 dentists, which was taken in 2006,
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