The phrase "groups of days" is correct and usable in written English.
It is often used to refer to periods of time that have been divided into multiple days. For example, you could say "I'm working 9am to 5pm for three groups of days this week."
Diurnal radii change was observed for groups of days within periods of low and high solar activity and different seasons of the year.
The F layer vertical drifts averaged for the two groups of days, the red and blue curves corresponding to the first group and second group, respectively, (bottom).
The statistical analysis was conducted on those groups of days, revealing trends in each of the groups, similarities between days within groups and the 95th percentile radii as a practically applicable measure of model performance.
Correspondingly, the mean PRE vertical drift amplitudes representing the two groups of days (bottom panel) is significantly larger for the days of larger oscillation amplitude ("coherent" oscillations) than it is for the smaller amplitude (random) oscillations.
Determination of metabolites differentially expressed between the two groups of days was conducted by Student's t-tests also using a FDR of 0.1 (6 × 20 tests) to determine significance.
The firm helped manage one of the world's largest groups of day traders — people who speculate on stocks by buying and selling on the same day.
WHAT TO BRING Everything you might conceivably need in a given group of days' time spent outside in the tropics for the bulk of each day, with no access to the Internet and very little access to mobile phone networks.
Fig. 8 Band-pass filtered oscillations in F layer height at 8 MHz over Cachimbo, from midday to midnight, mass plotted for a group of days (top).
An intriguing aspect of the results in Fig. 8 is that there is a group of days when the gravity wave-induced oscillations are nearly in-phase on all those days, and with larger amplitudes (shown in the upper panel) than on the other group of days when the phases are random (middle panel).
This week is Holy Week, the group of days that constitute the last week of Lent and the week preceding Easter in most Christian traditions.
The terminal bulb and corpus analysis was performed by randomly choosing 64 animals from each age group of days 2 to 8 for training, and the remaining 16 50 animals per age group for testing.
