Macmillan Learning Determine which abuse of statistics is most appropriate: A Christmas decoration company claims their sales have increased 300% since October. Voluntary response samples Distorted percentages Samples that are too small Loaded questions Self-interest study Wording of a question Correlation vs. causation Deliberate distortions
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Use Procedure 12.2 on page 558 to perform an appropriate hypothesis test. Be sure to check the conditions for using that procedure. The Arizona Republic conducted a telephone poll of 758 Arizona adults who celebrate Christmas. The question asked was, "In your family, do you open presents on Christmas Eve or Christmas Day?" Of those surveyed, 394 said they wait until Christmas Day. a. Determine the sample proportion. b. At the $5 \%$ significance level, do the data provide sufficient evidence to conclude that a majority (more than $50 \%$ ) of Arizona families who celebrate Christmas wait until Christmas Day to open their presents?
Inferences for Population Proportions
Hypothesis Tests for One Population Proportion
Q1. You conduct a study in which you measure two political attitudes and find a correlation of +.07. This is considered a: Group of answer choices a. weak negative linear correlation b. strong positive linear correlation c. weak positive linear correlation d. strong negative linear correlation Q2 Netflix runs a study with 42 subscribers as participants. Netflix records the number of hours per week that these subscribers watched something on Netflix. It also asked them to report their age. They calculated an r = -.33 (α = .05 two tail). Should you calculate r2 ? Group of answer choices a. Cannot be determined b. Yes, the result was statistically significant. c. No, the result was not statistically significant
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Let p be the proportion of customers who disapprove of the actions taken in the conflict of interest marketing advertisement used by a business. It has been found 70% from the population have disapproved up to this point. The business wants to determine if the proportion from their random sample of 250 of their customers who disapprove of the conflict of interest actions has increased. With z = 2.67 and σ = 0.01, what are the conclusions. (Type in your answer to be graded)
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