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At the time she was hired as a server, beth was told, "you can average more than $20 a day in tips." Over the first 35 days she was employed at the resturant, the mean daily amount of her tips was $24.85, with a standard deviation of $3.24. At the .01 significance level, can Beth conclude that she is earning an average of more than $20 in tips? State the null hypothesis and alternate hypothesis, state decsision rule, and compute the value of the test statistics? What is the P-value?
(a) State the null hypothesis and the alternate hypothesis.
(b) State the decision rule.
(c) Compute the value of the test statistic.
(d) What is your decision regarding H0?
(e) What is the p-value?
Develop a stem-and-leaf chart. Summarize the number of times each ATM was used. What was the typical, minimum, and maximum number of times each ATM was used?
The probability I'll jog today is 0.90 and the probability you'll jog tonight is 0.30. Find the probability:
Conduct post hoc comparisons with the LSD method. Which groups differ significantly at α = 0.05?
A company adminsters an "aptitude test for managers" to aid in selecting new management trainees. Prior experience suggests that 60 percent of all applicants for management trainee positions would be successful if they were hired.
Determine the centerline and the upper and lower control limits for a 3-sigma mean control chart in which each sample consists of 4 cylinders
If we repeated this procedure many, many times, only 5 percent of the 95 percent confidence intervals would fail to include the mean Math SAT score of the population of all students at this college.
What is the relationship between the value for degrees of freedom and the shape of the t distribution? What happens to the critical value of t for a particular alpha level of df increases in value?
Suppose normality, determine a 90% confidence interval for population variance.
What are the Chi-square results? What are the expected and the observed results that were found? Are they results of the Chi-Square significant? What do the results mean?
According to study done by Nick Wilson of Otago University, the probability a randomly selected individual will not cover his or her mouth when sneezing was 0.267. Suppose you sit on a mall bench and observe 200 people pass by as they sneeze.
Determine the mean and standard deviation of the data. What percentage of the data lies within one standard deviation of the mean value?
A soft-drink manufacturer claims that its 12-ounce cans do not contain, on average, more than 30 calories. A random sample of 16 cans of this soft drink, which were checked for calories
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