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Question: A study was conducted to determine whether a correlation exists between consumers' perceptions of a television commercial (measured on a special scale) and their interest in purchasing the product (measured on a scale). The results are n = 65 and r = 0.37. Is there statistical evidence of a linear correlation between the two variables?
a sample of 16 items provides a sample standard deviation of 9.5. test the following hypotheses using a .05.? 0 s 2
A throws six dice and wins if he scores at least one ace. B throws twelve dice and wins if he scores at least two aces. Who has the greater probability to win?
A researcher used stepwise regression to create regression models to predict Birth-Rate (births per1000) using five predictors:
The Artist's Palette sells high-end art supplies to the art students at three regional art and design schools in Philadelphia, Washington, D.C., and Baltimore.
Choose a variable and collect data for at least three different groups (samples). Compare the means of the three groups using the one-way ANOVA technique. Complete the following
Compute the correlation coefficient for the data. (Round your answer to 4 decimal places, the tolerance is +/-0.0001.) What is your interpretation of this value?
P(A 1 )= .20, P(A 2 ), and P(A 3 )= .40. P(B 1 I A 1 ) = .25. P(B 1 I A 2 ) = .05. P(B 1 I A 3 )=.10. Use Bayes' theorem to determine P(A 3 I B 1 )
in a large population 95 of the households have cable tv. a simple random sample of 64 households is to be contacted
Test at the 5% level whether the incidence of smoking depends on the age category
Suppose a population proportion is .40, and 80% of the time when you draw a random sample from this population you get the sample proportion of .35 or more.
a sample of 400 racing cars showed that 80 of them cost over 700000. what is the 99 confidence interval for the true
A data set called "Breakfast food data" is on D2L. You will use this data set to create some graphs and answer some questions about the average sugar.
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