+ X C Adth Bunt And Coworkers Agke Student Question ii G coursesaplaarna servlet

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+ X C Adth Bunt And Coworkers Agke Student Question ii G coursesaplaarna servlet/quiz7ctx-mlpwest 0007&quiz; actions takeQuiz&quiz; prot Gud-QNAPCOA Attempts A Aa 4. Part II, Problem 3 Ardch Brut and workers surveyed 557 urdergraduate college students to eanne ter weight status, health beheviors, and diet. Using body mass index (BMI), they classified the students into four categories: underweight, healthy weight, overweight, and cbese. They also mesured dietary variety by counting the number of different foods ate from several food groups. Note that the researchers were not messuring the amount of food eaten, it was somewhat surprising that each student but rather the number of difterent foods eaten (variety, not quantity). Nonetheless, the results showed no differences related to s that were related to eating fatty andjor sugary snacks among the four weight categories. (Brunt, Suppose a researcher conducting a follow-up study obtains a sample of n- 25 students classifted as being of healthy questionmaire, and the heaithy weight group produces a mean of N-3.95 for the fatty sugary sneck category A., Rhee, Y., & Zhong, L (2008) Differences in dietary patterns amang college students according to body mass index. Journal of Amenican College Hewlth, 56, 629-634.] weight and a sample of n-36 students classifed as overweight. Each student completes the food variety compared to a mean of M 4.41 for the overweight group. The results from the Brunt et al. study shawed an overall mean vaniety score of p-4.22 for the fatty/sugary snack food group. Assume thet the distribution of scores is approximately normal with a standard deviation or -0.60. Does the sample of n36 indicate that the number of fatty/sugary snacks eaten by overweight students is significantly different from the overall population mean? Use a two-tailed test with o-.05. A Standard Nomal Distribution tool is available at the end of this problens. Use two decimal places for z scores and critical values For this sample, z- overweight students is not signficantly different from the number eaten by the general population. and the critical value for z a The number of fatty/sugary snacks eaten by Based on the sample of n -25 healthy-weight students, can the researcher condlude that healthy-weight students oat signficantly fewer fatty/sugary snacks than the overall population? Use a one-taled test with .05 For this sample z significanty fewer fatty/sugary snacks than the general population does and the critical value for z is Healthy-weight students do not eat

Explanation / Answer

1) for overweight students : z =(X-mea)/std error =(4.41-4.22)/(0.6/(36)1/2)=1.9

critical value for z = -/+ 1.96

is not significantly different.........

2) for healthy weight student:

z =(X-mea)/std error =(3.95-4.22)/(0.6/(25)1/2)=-2.25

critical value for z = -/+ 1.96

is significantly different.......

( plrease revert for any clarificaiton

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