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One-Sample t Test
Criterion: Hand calculate a one-sample t test.
Data: Rex's Flower Shop advertised fresh cut roses that last longer than other roses. The mean vase life for a rose is 8 days. The following is a sample of the number of vase life days for 9 bouquets of roses from Rex's Flower Shop: 8, 6, 12, 11, 8, 9, 14, 15, 10.
Instruction: Complete the following:
a. State the nondirectional hypothesis.
b. State the critical t for α = .05 (two tails).
c. Calculate t. Show your work.
d. Answer: Is the vase life of Rex's roses significantly different than the population mean? Explain.
Compare the Friedman test with the randomized block ANOVA in terms of (a) their respective null and alternative hypotheses, and (b) the assumptions required in order to use each test.
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Identify two variables for which I would utilize a repeated measures ANOVA in my analysis. Describe the variables and their scale of measurement.
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when playing a new board game you are required to roll 6 standard six-sided dice. if x is the number of 6s rolled the
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Write a few sentences commenting on the appropriateness of the researcher's conclusion and on the article headline.
because elderly people may have difficulty standing to have their height measured a study looked at the relationship
For each of the following two situations, explain whether it would be more appropriate to use a confidence interval for the mean or a prediction interval.
STA 250, SPSS Assignment. According to the US Census, the United States population is 0.77 White, 0.13 Black, 0.18 Hispanic, and 0.06 Asian. Which races are overrepresented on Rikers Island (SPSS variable name: ethn)
In this study we would reject the null hypothesis that the correlation between the variables is zero and not significant.
In a random sample of 40 days, the mean tons/employee hour was 4.99. Assume σ = 1.14. Find a 95% confidence interval for the true mean tons/ employee hour.
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