Donating Blood to Grandma? Can young blood help old brains? Several studies1 in mice indicate that it might. In the studies, old mice (equivalent to about a 70-year-old person) were randomly assigned to receive blood plasma either from a young mouse (equivalent to about a 25-year-old person) or another old mouse. The mice receiving the young blood showed multiple signs of a reversal of brain aging. One of the studies2 measured exercise endurance using maximum treadmill runtime in a 90-minute window. The number of minutes of runtime are given in the table below for the 17 mice receiving plasma from young mice and the 13 mice receiving plasma from old mice. The data are also available in YoungBlood. Young 27 28 31 35 39 40 45 46 55 56 59 68 76 90 90 90 90 Old 19 21 22 25 28 29 29 31 36 42 50 51 68 Round your answers to two decimal places. (a) Calculate , the mean number of minutes on the treadmill for those mice receiving young blood. Enter your answer in accordance to item (a) of the question statement (b) Calculate , the mean number of minutes on the treadmill for those mice receiving old blood. Enter your answer in accordance to item (b) of the question statement (c) To measure the effect size of the young blood, we are interested in the difference in means . What is this difference? Enter your answer in accordance to item (c) of the question statement (d) Does this data come from an experiment or an observational study? Choose the answer from the menu in accordance to item (d) of the question statement (e) If the difference is found to be significant, can we conclude that young blood increases exercise endurance in old mice? (Researchers are just beginning to start similar studies on humans.) Choose the answer from the menu in accordance to item (e) of the question statement
Contingency Table
A contingency table can be defined as the visual representation of the relationship between two or more categorical variables that can be evaluated and registered. It is a categorical version of the scatterplot, which is used to investigate the linear relationship between two variables. A contingency table is indeed a type of frequency distribution table that displays two variables at the same time.
Binomial Distribution
Binomial is an algebraic expression of the sum or the difference of two terms. Before knowing about binomial distribution, we must know about the binomial theorem.
Donating Blood to Grandma?
Can young blood help old brains? Several studies1 in mice indicate that it might. In the studies, old mice (equivalent to about a 70-year-old person) were randomly assigned to receive blood plasma either from a young mouse (equivalent to about a 25-year-old person) or another old mouse. The mice receiving the young blood showed multiple signs of a reversal of brain aging. One of the studies2 measured exercise endurance using maximum treadmill runtime in a 90-minute window. The number of minutes of runtime are given in the table below for the 17 mice receiving plasma from young mice and the 13 mice receiving plasma from old mice. The data are also available in YoungBlood.
Young |
27 | 28 | 31 | 35 | 39 | 40 | 45 |
|---|---|---|---|---|---|---|---|
| 46 | 55 | 56 | 59 | 68 | 76 | 90 | |
| 90 | 90 | 90 | |||||
| Old | 19 | 21 | 22 | 25 | 28 | 29 | 29 |
| 31 | 36 | 42 | 50 | 51 | 68 |
Round your answers to two decimal places.
(a) Calculate , the mean number of minutes on the treadmill for those mice receiving young blood.
Enter your answer in accordance to item (a) of the question statement
(b) Calculate , the mean number of minutes on the treadmill for those mice receiving old blood.
Enter your answer in accordance to item (b) of the question statement
(c) To measure the effect size of the young blood, we are interested in the difference in means . What is this difference?
Enter your answer in accordance to item (c) of the question statement
(d) Does this data come from an experiment or an observational study?
Choose the answer from the menu in accordance to item (d) of the question statement
(e) If the difference is found to be significant, can we conclude that young blood increases exercise endurance in old mice? (Researchers are just beginning to start similar studies on humans.)
Choose the answer from the menu in accordance to item (e) of the question statement
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