question 1

For each of the variables described below, indicate whether it is a quantitative or a categorical (qualitative) variable. Also, indicate the level of measurement for the variable: nominal, ordinal, interval, or ratio. Make sure your responses are the most specific possible. Type of Level of Variable variable measurement X 5 ? O Nominal O Quantitative (a) Exchange on which a stock is traded O Ordinal (NYSE, AMEX, or other) O Interval O Categorical O Ratio O Nominal O Quantitative (b) Distance (in miles) from home to the O Ordinal nearest all-night convenience store O Interval O Categorical O Ratio O Nominal O Quantitative O Ordinal (c) Temperature (in degrees Fahrenheit) O Interval O Categorical O RatioA union of restaurant and foodservice workers would like to estimate the mean hourly wage, u, of foodservice workers in the U.S. this year The mean hourly wage last year was $8.25, and there is good reason to believe that this year's value is less than last year's. The union decides to do a statistical test to see if the value has indeed decreased. The union chooses a random sample of this year's wages, computes the mean of the sample to be $7.88, and computes the standard deviation of the sample to be $1.10. Based on this information, complete the parts below. (a) What are the null hypothesis Ho and the alternative hypothesis #, that should be used for the test? X Ho : I DO SO >0 H 1 : 1 020 0=0 0#0 (b) Suppose that the union decides not to reject the null hypothesis. What sort of error might it be making? (Choose one) X ? (C) Suppose the true mean hourly wage for foodservice workers in the U.S. this year is $8.25. Fill in the blanks to describe a Type I error. A Type I error would be (Choose one) V the hypothesis that u is (Choose one) (Choose one) when, in fact, u is (Choose one)