A researcher is interested in hamster wheel-running activity during the summer versus the winter. She suspects that either the hamsters will run less during the winter to conserve energy or they will run more to keep warm. She records the activity of n = 25 hamsters during June, July, and August and compares their running-wheel revolutions per hour to the activity of the same hamsters during December, January, and February.
The data are collected, and the results show an average difference
score of MD = 5. 7 and
a sum of squares of SS = 2,851.44.
What is the value for degrees of freedom for this
repeated-measures t test?
What is the sample standard deviation (s) for the D scores? (one decimal)
What is the estimated standard error of the mean difference (SMD) for this study? (two decimals)
value for degrees of freedom for this repeated-measures t test =n-1=24
sample standard deviation (s) for the D scores =sqrt(SS/(n-1))=sqrt(2851.44/24)=10.9
estimated standard error of the mean difference =10.9/sqrt(25)=2.18
A researcher is interested in hamster wheel-running activity during the summer versus the winter....
A researcher is interested in hamster wheel-running activity during the summer versus the winter. He suspects that either the hamsters will run less during the winter to conserve energy or they will run more to keep warm. He records the activity of n = 25 hamsters during June, July, and August and compares their running-wheel revolutions per hour to the activity of the same hamsters during December, January, and February. The data are collected, and the results show an average...
4. Calculating the standard deviation and the estimated standard error for the sample mean difference Aa Aa A researcher is interested in hamster wheel-running activity during the summer versus the winter. He suspects that either the hamsters will run less during the winter to conserve energy or they will run more to keep warm. He records the activity of n = 16 hamsters during June, July, and August and compares their running-wheel revolutions per hour to the activity of the...
Aa Aa E 4. Calculating the standard deviation and the estimated standard error for the sample mean difference A researcher is interested in hamster wheel-running activity during the summer versus the winter. He suspects that either the hamsters will run less during the winter to conserve energy or they will run more to keep warm. He records the activity of n = 25 hamsters during June, July, and August and compares their running-wheel revolutions per hour to the activity of...
Standara deviatIon anu tne esumateu stdnuaru erTur 1or the samppie Aa Aa mean difference A researcher is interested in hamster wheel-running activity during the summer versus the winter. She suspects that either the hamsters will run less during the winter to conserve energy or they will run more to keep warm. She records the adctivity of n 16 hamsters during June, July, and August and compares their running-wheel revolutions per hour to the activity of the same hamsters during December,...
21) A researcher wants to know whether there is a difference in the physical activity level of children during the morning and afternoon. He observes a total of 40 children (20 boys and 20 girls) from randomly selected schools during morning and afternoon recess and gives each child a score (out of 50) based on how much of the time they spend sitting, standing, walking or running. Each child receives a score in the morning and another in the afternoon....