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In a survey about soft drinks it was found that 5% of the respondents like diet soft drinks. 12% of them liked the brand Coke. Of all the Diet soda drinkers 40% liked Coke.
a. What is the probability that the respondent like Diet or not Coke?
b. Of the people who did not like diet drinks what is the probability that that liked Coke?
A school administrator randomly selects 12 classes from your school and then selects all of the students of those classes to study a school library issue. Which type of sampling design is being used.
A researcher used stepwise regression to create regression models to predict Birth-Rate (births per1000) using five predictors:
What is the predictive value of a negative test result? In other words, what is the probability that an individual who returns a negative tests for hypertension is not hypertensive? Please give your answer to 3 decimal places.
Explain distribution of sample means (shape , Expected value , and standard error ) for samples of n=36 selected from population with a mean of m =100 and standard deviation of s=12.
Find the sample size for the 95% confidence interval used to estimate the population proportion.
Form the column of differences and find the mean and standard deviation of this column of numbers.
Super Cola Bottles soft drinks labeled "net weight 16 ounces." An overall process average of 16.01 ounces has been found by taking several batches of samples, in which each sample contained 5 bottles.
Using the p-value approach, test the hypotheses at the 1% level of significance.
Multiple choice question based on multiple regression - partial computer output based on a sample of 16 observations and find the estimated regression equation
Do the data indicate that the sleeping pill is effective at a 1% level of significance?
Suppose you are given a grant to run a controlled experiment. Explain how you would structure the experiment in order to estimate the casual effect of hours on sat.
(A) At the 0.05 level of significance, use the six step critical value approach to hypothesis testing to try and prove that the 2004 proportion has increased. (B) Use the 5 step p-value approach. Interpret the meaning of the p value.
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