Salut. BC²=AC²-AB² , BC=√((10)²-(8)²) , BC=√(100-64) , BC=√36 , BC=6cm. J'espere t,avoir aidé
Answer:
oh my- this actually made me happy-
Step-by-step explanation:
Answer:
4
Step-by-step explanation:
six in total, ended up cooking two.
Answer:
There is a significant difference between marathon runners and men who don't exercise.
Step-by-step explanation:
Null hypothesis: There is no significant difference between marathon runners and men who don't exercise.
Alternate hypothesis: There is a significant difference between marathon runners and men who don't exercise.
Sample 1 (marathon runners)
mean = 51.3 mg/dL
sd = 14.2 mg/dL
n = 19
Sample 2 (men who don't exercise)
mean = 44 mg/dL
sd = 15 mg/dL
n = 32
Pooled SE = 2.43 mg/L
Test statistic (t) = (mean 1 - mean 2) ÷ sqrt[pooled SE(1/n1 + 1/n2)] = (51.3 - 44) ÷ sqrt[2.43(1/19 + 1/32) = 7.3 ÷ sqrt(0.204) = 7.3 ÷ 0.452 = 16.2
The test is a two-tailed test. The critical value is given as 2.009. For a two-tailed test, the region of no rejection of the null hypothesis lies between -2.009 and +2.009.
Conclusion:
Reject the null hypothesis because the test statistic 16.2 falls outside the region bounded by -2.009 and 2.009.
Therefore, there is a significant difference between marathon runners and men who don't exercise.
