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Based on past surveys over several years, a small business believes that 75% of their customers are satisfied with their services. Due to the recent conditions, changes in policy and additional charges, the business decides to select a random sample of 16 recent customers and ask them if they are satisfied with their services. If the number of satisfied customers in the sample is 11 or fewer, the business will conclude that this is an indication of a need for improvement in customer service and they will try to determine ways to provide it. What is the probability that the results of the sample will indicate a need to improve customer service?
HCAD 6671- Final Exam Take-Home Compute an appropriate test statistic. Give the p-value - State an appropriate conclusion, both in statistical terms (reject/don't reject) and in the context of the problem.
Interpret the slope of this line in context.- Explain why it's silly to attach any meaning to the y-intercept.- When this model predicts high Fuel Efficiency, what can you say about those predictions?
Three HIV treatments were tested for their effectiveness in preventing progression of HIV in children. Of 276 children given drug A, 259 lived and 17 died. Of 281 children given drug B, 274 lived and seven died.
What is the marginal probability that an acorn will not be buried, (hint: it is not 0.34)?
a researcher would like to evaluate the claim that large doses of vitamin c can help prevent the common cold. one group
This problem related to Basic Statistics and it discuss about measuring students' intrinsic religious commitment with the introduction of faith based orientation course in a university
what are the two critical values for a two-tailed test with a 0.01 level of significance when n is large and the
Problem: Two rainstorms occurred in one week in a certain area. In the first storm 30 ml of rain fell per hour, and in the second storm 20 ml of rain fell per hour.
The population mean for psychology test in a class that is usually taken by juniors and seniors is 100 (out of 200)with a population standard deviation of 16.
The deadly Ebola virus is a threat to both people and gorillas in Central Africa. An outbreak in 2002 and 2003 killed 91 of 95 gorillas in seven home ranges in the Congo. Find the correlation r between distance and time. Find the regression equati..
The normal distribution is really a family of distributions. Is the standard normal distribution also a family of distributions? Explain.
Explain why a t-test is necessary before you accept this correlation as being real in the population.
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