-50 521 erwinayes MAT 122*A1 STATISTICS-T/TH @ 7PM F\' 2018 sarah ismail & 9/16/
ID: 3070818 • Letter: #
Question
-50 521 erwinayes MAT 122*A1 STATISTICS-T/TH @ 7PM F' 2018 sarah ismail & 9/16/18 8:35 PM til Homework: HMWRK ASSIGNMENT #2 Score: 0.5 of 1 pt Hw Score: 41 94%,755 of 18 pts 3.1.35 EQuestion Help Five and 58 a set of measurements. The five pulse rates have a mean of 62 6 beats per minute Four of the pulbse rates are 69, 52, 50, a. Find the missing valuse b. Suppose that you need to create a list of n values that have a specific known mean. Some of the n values can be freely selected How many of the n values can be freely assigned before the remaining values are determined? (The result is referred to as the number of degrees of freedom.) a. The missing value is 84 beats per minute (Type an integer or a decimal. Do not round ) (Type an expression using n as the variable) mean n-1 can be freely selected because the remaining value(s) can be expressed in forms of the assigned valkues and the known mean B. Of the n values. can be freely selected because the remaining value(s) can be expressed in terms of the mean, median and mdrange of the assigned the n values, values. All parts showingExplanation / Answer
Answer a)
Mean = 62.5
Sample size = 5
Lext x be the missing value
(x + 69 + 52 + 50 + 58)/5 = 62.5
x + 229 = 62.5*5
x = 312.5-229
x = 83.5
Missing value is 83.5 beats per second
Answer b)
Whenever you have one group of n numbers, the degrees of freedom is equal to n - 1.
In the previous problem, we knew the values of n - 1 numbers (the 4 we were given) and sample mean and using this information, we were able to find the 5th number.
What if we were given n - 2 numbers? In this case, we won't be able to predict remaining 2 numbers with certainty.
So it can be said that Of n values n-1 can be freely selected because the remaining value(s) can be expressed in terms of the assigned values and the mean (Option B)
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.