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A food snack manufacturer samples 11 bags of pretzels off the assembly line and weighs their contents. If the sample mean is 15.2 oz. and the sample standard deviation is 0.40 oz., find the 95% confidence interval of the true mean.
Write the null and alternative hypotheses you would use to test the following situation.
Can we conclude a difference in voting patterns for men vs. women? YES or NO (circle one)
Find a 98% confidence interval for the true proportion of students who have a personal blog with a maximum margin of error of 0.03. How many students do you survey?
Set up hypotheses and carry out all relevant tests. Describe all results and implications which you have discovered.
How does a t test differ from a z test in terms of when it is used, how it is calculated, and how we determine significance?
A driver hired at the beginning of a year can be used to meet the current year's requirements and is paid full salary for the current year.
You've two separate sets of data. From one set you calculate the standard error to be 500. From the other set, the standard error was 5.
A haulage contractor has two loads to deliver to separate customers. He has 4 trailers of which 2 are new. If the trailers are randomly chosen for any particular delivery: (a) In how many ways can the trailers be allocated the deliveries?
Under proposed plan, how long, on average, will patient stay in ER? On average, how long will Potential Admit stay in ER?
Explain the difference between one-factor and two-factor ANOVA. (b) Write the linear model form of one-factor ANOVA. (c) State the hypotheses for a one-factor ANOVA in two different ways.
What is the probability of this event occurring if, in fact, the three cars shipped to dealer A were selected at random from the six produced?
What are various non-parametric tests utilized in business decision making? Give an example of each test with an appropriate business situation.
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