Q1. A survey was conducted in five countries.The percentages of respondents who said that they eat out once a week or more as follows:
Germany 10%
France 12%
United Kingdom 28%
Greece 39%
United States 57%
Suppose that the survey was based on 1,000 respondents in each country.
(a) At the 0.05 level of significance, determine whether there is a significant difference in the proportion of people who eat out at least once a week in the various countries.
(b) Find the P-value in(a)and interpret its meaning.
(c) If appropriate,use the Marascuilo procedure and alpha = 0.05 to determine which countries are different. Discuss your results.
Q2. Fitting a straight line to a set of data yields the following prediction line: Ybar i=2+5xi
(a) Interpret the meaning of the Y interpret,b0.
(b) Interpret the meaning of the slope,b1.
(c) Predict the mean value of Y for X=3.
Q3. If the values of X in problem 13.1 range from 2 to 25,should you use this model to predict the mean value of Y when X equals.
(a) 3?
(b) -3?
(c) 0?
(d) 24?