The sample mean is an unbiased estimate of the population
mean. This tells us that the mean of all sample means is equal to the
population mean. Since we know that the population mean is 5.67, we also know
that the mean of sample means is also 5.67.
Answer:
you can make 8 groups with 2 girls and 1 boy in each group or you can make 4 groups with 4 girls and 2 boys in each group
Step-by-step explanation:
Answer:
8
Step-by-step explanation:
8x+13 + 12x +7 = 180 ( supplementary angles)
or, 20x + 20 = 180
or, 20x = 160
or, x = 160/20
x= 8