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A research manager at Coca-Cola claims that the true proportion, p, of cola drinkers that prefer Coca-Cola over Pepsi is greater than 0.50. In a consumer taste test, 100 randomly selected people were given blind samples of Coca-Cola and Pepsi. 58 of these subjects preferred Coca-Cola.
Is there sufficient evidence at the 5% level of significance to validate Coca-Cola's claim? Conduct an appropriate hypothesis test using
(i) the p-value method and
(ii) the rejection point method.
What does this data set imply about the possibility of predicting the boiling point of compounds in this series on the basis of the number of carbon atoms? Compute the correlation coefficient between these two variables, even though the number n i..
suppose that x is a continuous random variable with probability density function fx x18 over the interval 0 ? x ? 6.
In a study of women and heart disease, the following sample results were obtained: Among 10,239 women with low level of physical activity
the metal body for a spark plug is made by a combination of cold extrusion and machining. the occurrence of surface
before a championship football game the referee is given a special commemorative coin to toss to decide which team will
Calculate the correlation coefficient for the given data? Interpretation of the correlation coefficient?
What are the three criticisms of null hypothesis statistical testing?
Ann and Jim, two employees in a fast-food restaurant, play the following game while waiting for customers to arrive: Jim pays Ann 2 cents if the next customer does not arrive within 1 minute; otherwise, Ann pays Jim 2 cents. Determine Jim's averag..
On the basis of the confidence interval found in part (a), can we infer that fewer than 50% of the population favors the proposed law?
A polling organization plans to sample 1000 adult Americans to estimate the proportion of Americans who think crime is a serious problem in this country. (a) What is the parameter of interest to the polling organization? (b) What will be the stati..
The following two-way table of counts summarizes data for age group and frequency of reading newspapers for respondents in the 2008 General Social Survey.
Choose a construct you would like to measure. Create an operational definition of your construct using at least three peer-reviewed journal articles as references.
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