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- 20% of 60 = __________Calcium is an essential nutrient for strong bones and for controlling blood pressure and heart beat. Because most of the body's calcium is stored in bones and teeth, the body withdraws the calcium it needs from the bones. Over time, if more calcium is taken out of the bones than is put in, the result may be thin, weak bones. This is especially important for women who are often recommended a calcium supplement. A consumer group activist assumes that calcium content in two popular supplements are normally distributed with the same unknown population variance, and uses the following information obtained under independent sampling: Supplement 1 Supplement 2 = 1,049 mg x2 = 1,053 mg s1 = 16 mg s2 = 11 mg nj = 13 n2 = 16 Let uj and u2 denote the corresponding population means. Construct a 95% confidence interval for the difference pu1 – u2. (Round the interval to two decimal places.)If 53*+8 -253-, then the value of x is %3D Select one: 2 O a. O b. -2 c. -3 . d.
- can you guys explain how they got this answer80% https://www.xyzhomework.com ing. Is the average time to complete an obstacle course different when a patch is placed over the right eye than when a patch is placed over the left eye? Thirteen randomly selected volunteers first completed an obstacle course with a patch over one eye and then completed an equally difficult obstacle course with a patch over the other eye. The completion times are shown below. "Left" means the patch was placed over the left eye and "Right" means the patch was placed over the right eye. Time to Complete the Course Right| 44 47 41 48 41 47 47 42 Left 41 45 39 49 39 43 44 39 Assume a Normal distribution. What can be concluded at the the a = 0.10 level of significance level of significance? For this study, we should use Select an answer a. The null and alternative hypotheses would be: Ho: E Select an answer (please enter a decimal) Select an answer H1: ? (Please enter a decimal) Select an answer Select an answer b. The test statistic ? (please show your…The number of hours of computer usage in a day of a random sample of 20 students was recorded as follows. 2.5 3.2 2.5 1.5 6. 1 3.5 1 1 3. 2.5 1 1 2.5 4.5 4 Determine the value of each measure. [ Choose ] mean variance [Choose ] standard deviation [ Choose ] 3. 3. 2.