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Trials in an experiment with a polygraph include 96 results that include 23 cases of wrong results and 73 cases of correct results. Use a 0.05 significance level to test the claim that such polygraph results are correct less than 80?% of the time. Identify the null? hypothesis, alternative? hypothesis, test? statistic, P-value, conclusion about the null? hypothesis, and final conclusion that addresses the original claim. Use the? P-value method. Use the normal distribution as an approximation of the binomial distribution.
Let p be the population proportion of correct polygraph results. Identify the null and alternative hypotheses. Choose the correct answer below.
Operations manager thinks that only 10% of room service orders must take longer than 25 minutes if hotel has good customer service. Does hotel room service fulfil this goal?
Scheherazade (Sche) is studying the effects of the pandemic on her neighborhood, Manzanita Park. In her research, she has found that the mean household income f
The impact of a mentoring program for highly aggressive children. Faith, Fiala, Cavell, and Hughes (2011) examined the impact of a mentaring program.
How did canals relate to the other important issues of the time, such as westward movement, rise of cities, and immigration?
I. What is the population? II. What is the sample? III. Is the study observational or experimental? Justify your answer. IV. If observational, identify ALL variables. If experimental, identify ALL independent and dependent variables.
The problem related to Basic Statistics and discuss about the application of ANOVA for data analysis. A statement about longer working hours increasing fatigue in medical staff and the increase in errors has been statistically tested using ANOVA i..
Consider babies born in the "normal" range of 37 - 43 weeks gestational age. Extensive data supports the assumption that for such babies born in the United States, birth weight is normally distributed with mean = 3432 grams and standard deviati..
Estimate the true proportion of college students who believe in the possibility of haunted places with 95% confidence.
The average salary for graduates entering the actuarial field is $40,000. If the salaries are normally distributed with a standard deviation of $5,000, find the probability that
What are the null and alternative hypotheses?- Check the assumptions necessary for inference.- Test the null hypothesis.
What is the probability that the mean price for a sample of 30 service stations is within $.03 of the population mean?
For an independent-measures ANOVA comparing three treatments with a sample of n = 5 in each treatment, what is the critical value for the F-ratio using a = .05?
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