# Statistics

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Solution Library **

#### ANOVA Drawback On Type 1 Error

Question 1. One drawback of ANOVA is that it allows type 1 error to escalate for every additional group tested. a. True. b. False. 2. When and why would you conduct post hoc tests as a follow up to the overall F test? a. When the overall F test is NOT significant; to det ... Read More

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#### Appropriate Use When Testing Hypothesis For Studying Groups

Question 1. The appropriate statistic to use when testing the hypothesis for a study with three treatment groups is a a. One-sample t test. b. Two-sample t test. c. ANOVA F test. d. Either b or c is appropriate. 2. Assume that the group means in a study are as follows: Group 1 ... Read More

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#### Identify HSD For Given Data

Question 1. Assume that the group means in a study are as follows: Group 1 = 20. Group 2 = 18. Group 3 = 37. If the Tukey HSD critical value is 18, what can you say about the location of the significant difference between the groups? a. It lies between Groups 1 and 2 only. b. It lies ... Read More

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#### Check Whether Or Not For PearsonÃ¢â‚¬â„¢s r Both Variables Must Be Linear

Question 1. One way means that a. There is only one correct way to calculate the test statistic. b. The results can be in only one direction. c. There is only one sample (group) in the study. d. There is only one IV in the study. 2. For a Pearson's r, both variables must be lin ... Read More

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#### Increase In Correlation And Scores Spread Wide

Question 1. As the strength of a correlation increases, the scatterplot of the scores becomes more widely spread out. a. True. b. False. 2. When scores vary in the same direction on two variables, the relationship is positive. a. True. b. False. Summary These ... Read More

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#### Are Hours Of Sleep And Tiredness Related

Question 1. Hours of recent sleep and reported tiredness tend to be positively related. a. True. b. False. 2. Assume that the bulk of your scatterplot data graphs into the following two quadrants of a Cartesian coordinate system: (+X, +Y) and (–X, –Y). This relationsh ... Read More

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#### Two Features Of Correlation Coefficient

Question 1. A study reports: r(95) = +0.92, p < 0.01. How confident can you be that the obtained correlation is real and not due to mere chance? a. 92% confident. b. 95% confident. c. 99% confident. d. There is not enough information to tell. 2. Any correlation coefficient i ... Read More

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#### What Do We Seek To Determine In Correlational Study

Question 1. The two variables in a correlational study are called the a. Predictor and predicted. b. Predictor and criterion. c. Independent and dependent. d. Relator and relatist. 2. In a correlational study, we seek to determine a. If the IV causes an outcome in the ... Read More

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#### Two Way Balancing Using ANOVA

Question A consumer product agency wants to evaluate the accuracy of determining the level of calcium in a food supplement. There are a large number of possible testing laboratories but only three assay methods of interest. The agency randomly selects three laboratories for use in the study. Each l ... Read More

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#### Two Way Factorial Using ANOVA

Question Researchers conducted an experiment to determine the content uniformity of film-coated tablets produced for a cardiovascular drug used to lower blood pressure. They obtained a random sample of three batches from each of two blending sites: within each batch they assayed a random sample of ... Read More

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#### Factorial Design Using ANOVA

Question The purpose of this experiment was to determine how specifically selected water temperature (2 levels), water salinity (2 levels), and density level of shrimp populations (3 levels) influence the growth rate of shrimp raised in aquaria and whether these factors acted independently on the s ... Read More

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#### Nested Model Using ANOVA

Question A computer company wants to test the efficiency of its new programmable calculator. Engineers who were proficient in the use of this calculator and an earlier model were asked to work out two types of problems on both calculators. One of the problems was statistical type and the other was ... Read More

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