We have to determine the UCL and the LCL by applying the above formulae to the data given in Example 22.3.
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- Endocrinology In Section 2.10, we described Data Set BONEDEN.DAT concerning the effect of tobacco use on BMD. Note: 2.38-2.40 Involve computing a new variable C. Compute C using the formula given and then use STATA to produce the output requested. 2.38. For each pair of twins, compute the following for the lumbar spine: A = BMD for the heavier-smoking twin − BMD for the lighter-smoking twin = x1 − x2 B = mean BMD for the twinship = (x1 + x2)/2 C = 100% × (A/B) Derive appropriate descriptive statistics for C over the entire study population. 2.39. Suppose we group the twin pairs according to the difference in tobacco use expressed in 10 pack-year groups (0–9.9 pack-years/10–19.9 pack-years/20–29.9 pack-years/30–39.9 pack-years/40+ pack-years). Compute appropriate descriptive statistics, and provide a scatterplot for C grouped by the difference in tobacco use in pack-years 2.40. What impression do you have of the relationship between BMD and tobacco use based on Problem 2.39?Consider the following scenario and answer the questions below: The ornithologist decided to investigate the effect of temperature on the migration of North American birds. Develop a hypothesis in the appropriate format. Identify the independent variable. Identify the dependent variable. Plan an investigation (what would she do to collect data?). Did she engage in basic science or applied science? Explain. Did she engage in inductive or deductive reasoning? Explainquestion 8
- ch 13. 5:Q. 22A study was conducted to determine the effect of a special diet on a person's cholesterol level. The data below are the cholesterol levels of a random sample of seven middle-aged adults who were on a regular diet and who agreed to adopt a special diet for one month. Cholesterol levels were taken before adopting the special diet and a month after. Subject 1 2 3 4 5 7 Before 196 144 203 161 240 245 After 140 153 180 145 211 200 Perform the appropriate test of hypothesis to determine if the special diet is effective in lowering cholesterol level. Assume that the differences between the cholesterol levels before adopting the diet and a month after follow the normal distribution. Use a 5% level of significance. A. Perform a complete test of hypothesis. B. Select here the conclusion for this test of hypothesis. The special diet is effective in lowering cholesterol level. There is no sufficient evidence to say that the special diet is effective in lowering cholesterol level. 6 169 145
- G.324.High Cholesterol: A group of eight individuals with high cholesterol levels were given a new drug that was designed to lower cholesterol levels. Cholesterol levels, in milligrams per deciliter, were measured before and after treatment for each individual, with the following results: Individual Before After 1 253 202 2 237 213 3 282 184 276 205 246 179 6 258 209 7 293 181 8 276 187 Send data to Excel Part: 0 / 2 Part 1 of 2 focal laual. Int & ronracent the cholesterol level before treatment minus the Part 1 of 2 (a) Construct a 99% confidence interval for the mean reduction in cholesterol level. Let d represent the cholesterol level before treatment minus the cholesterol level after. Use the TI-84 calculator and round the answers to at least one decimal place. A 99% confidence interval for the mean reduction in cholesterol level is <<0.III. At the Olympic level of competition, even the smallest factors can make a difference between winning and losing. Previous research has found that Olympic marksmen shoot much better when they fire between heartbeats rather than during heartbeats (Pelton, 1983). The tiny vibration of a heartbeat appears to be enough to influence accuracy. A student at the University of Texas attempts to replicate the study with a group of collegiate marksmen. A group of collegiate marksmen (n = 6) fire a series of rounds while the student records heartbeats. For each shooter, a score is recorded for shots fired between and during heartbeats. Do the data support the earlier finding? Use alpha = .05. Shooter During Heartbeats Between Heartbeats A 93 98 В 90 94 C 95 96 92 91 E 95 97 F 91 97 State the hypotheses, critical values with df and alpha = .05, use SPSS and attach the SPSS output (which you've pasted into a word document to save the trees!) AND highlight the test-statistic and any other…SEE MORE QUESTIONS