MED 7300 Midterm: STAT 145 UMN Exam4 Spring13
Document Summary
Where appropriate, show work or explain answers and place final answers in the boxes provided: a tobacco company claims that its best-selling cigarettes contain at most 40 mg of nicotine. The average nicotine content from a simple random sample 15 cigarettes is 42. 6 mg with a standard deviation (s) of 3. 7 mg. Use a 1% level of significance ( =0. 01) to carry out the appropriate test of significance. (a) (4 pts. ) State your hypotheses using mathematical notation: (b) (4 pts. ) Interpret the null hypothesis (i. e. say what it means). (c) (4 pts. ) State your conclusion in terms of the problem: Mean: the number of calories in five randomly selected 1-ounce chocolate chip cookies of various brands was measured. The recorded number of calories for each cookie is: 125, 150, 185, 110, and 140. (a. ) (4 pts. ) Calculate the mean number of calories in the cookies. Calculate the standard deviation of calories in the cookies.
