Instructions: Download the problem set and answer each question in the space pro
ID: 3069858 • Letter: I
Question
Instructions: Download the problem set and answer each question in the space provided. Turn in a hard copy of this assignment with all pages stapled togetherl To receive full credit for numerical answers, you must show all hand-written work, round final answers to the correct number of significant digits, and include appropriate units. I. In general, if the number of repeated measurements is increased, what will happen to the 99% 7 confidence interval? A. It will increase. B. It will decrease. C. It will stay the same. 2 Assuming the same data set, which has a larger range: a 50% confidence interval or a 95% B confidence interval? A. 50 % confidence interval B. 95 % confidence interval C. The range is the same, as it is the same data set 3. The standard deviations for two sets of measurements were 0.64 (n 8) and 0.21 (n 4). Would it be appropriate to pool the standard deviations for a Case 2 t test? A yes B. no C. there is insufficient information to make a decision A t-test is used to evaluate the accuracy of a new method to determine the concentration of potassium in urine. This new method gave the value of 5.02 ± 0.03 mmol/L potassium (mean ± C195%) for a standard reference material certified to contain 5.00 mmol/L potassium. Is this new method accurate? Explain. 4. Page 1 of 4Explanation / Answer
#1.
If the number of repeated measurements is increased this will increase the mean which will result into the increase in increase in the CI
Option A
#2.
Higher the CI, larger will be the range
Option B
#3.
No, it is not appropriate to pool unless it is given that the two population has the same std. dev.
#4.
Here we need to test below hypothesis
H0: mu = 5
Ha: mu not equals to 5
The CI is (5.02 - 0.03, 5.02 + 0.03) i.e. (4.99, 5.05)
As the hypothesized mean falls within CI, we fail to reject the null hypothesis.
This mean new method is accurate.