Daily Practice

Higher

15th November 2024

5 questions · Higher tier · 360 questions in this band

1
Estimated Mean from Grouped Data
The table shows ages, in years, of 50 people at a gym: 10-20 (freq 6), 20-30 (freq 18), 30-40 (freq 16), 40-50 (freq 10). Estimate the mean age.
2
Sampling Methods
State one advantage of random sampling.
3
Collecting Data
State whether interviewing shoppers face-to-face about their favourite supermarket is primary or secondary data collection.
4
Comparing Data Sets
Class A has a mean test score of 62 and Class B has a mean of 58. Which class did better on average?
5
Combined Mean
Group A has 18 items with mean 62. Group B has 22 items with mean 70. Find the combined mean.

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