The daily minimum temperature (in °C) in Barkly East was recorded over 10 days: 10; 6; 2; 6; −4; 9; 8; −2; 10; 9. Every reading is then adjusted by +5∘C+5^\circ{}C+5∘C. On the next day, the minimum temperature was 12 °C. In total, there are now 11 days. Calculate the mean daily minimum temperature after the adjustment.
The Rustenburg handball team scored the following numbers of goals in its last 11 matches: 16; 28; 19; 28; 28; 26; 22; 33; 22; 26; 28. In its next match, the team scored 24 goals. In total, there are now 12 matches. Calculate the mean number of goals scored per match for all 12 matches.
Over 11 evenings, Lwandle's mean homework time was 23 minutes. Over a further 7 evenings, the mean was 32 minutes. Altogether, the two groups cover 18 evenings. Calculate the combined mean number of minutes spent on homework per evening.
Thabo recorded the number of minutes spent on homework on each of 7 evenings: 15; 17; 18; 12; 17; 45; 17. The 45-minute evening is later found to include time on another subject and is removed. After the removal, 6 evenings remain. Calculate the mean number of minutes spent on homework per evening for the remaining 6 evenings.
Over 9 days, the mean minimum temperature in Bethlehem was 8 °C. After one more day, the mean across all 10 days was 7,5 °C. What was the minimum temperature on that day?
The Kimberley soccer team scored the following numbers of goals in its last 7 matches: 17; 28; 31; 17; 22; 17; 16. The 31-goal result is later found to be a scoring error and is removed from the results. Every recorded score is then corrected by −3 goals. After the removal, 6 matches remain. Calculate the mean number of goals scored per match after the adjustment.
The mean mark (out of 50) of 11 learners in a Mathematics test was 40. In a second Mathematics class of 7 learners, the mean mark was 31. Altogether, the two groups cover 18 learners. Calculate the combined mean mark (out of 50).
The Kimberley netball team scored the following numbers of goals in its last 10 matches: 18; 28; 23; 27; 24; 23; 16; 31; 26; 22. The 31-goal result is later found to be a scoring error and is removed from the results. After the removal, 9 matches remain. Calculate the mean number of goals scored per match for the remaining 9 matches.
The daily minimum temperature (in °C) in Bethlehem was recorded over 10 days: −2; −1; 1; 6; 5; 0; 3; 3; 3; 13. The reading of 13 °C is later found to be a faulty-sensor error and is removed from the results. After the removal, 9 days remain. Calculate the mean daily minimum temperature for the remaining 9 days.
The mean mark (out of 50) of 10 learners in a Natural Sciences test was 32,5. After one more learner, the mean across all 11 learners was 31. What mark did that learner score?
The daily minimum temperature (in °C) in Dordrecht was recorded over 7 days: −4; 11; 5; 5; −2; 14; 15. On the next day, the minimum temperature was −4∘C-4^\circ{}C−4∘C. In total, there are now 8 days. Calculate the mean daily minimum temperature for all 8 days.
The Parys netball team scored the following numbers of goals in its last 9 matches: 27; 29; 27; 22; 19; 25; 19; 19; 17. Every recorded score is then corrected by +2 goals. In its next match, the team scored 16 goals. In total, there are now 10 matches. Calculate the mean number of goals scored per match after the adjustment.
