Answer:
(c) H0 should be rejected
Step-by-step explanation:
Null hypothesis (H0): population mean is equal to 5
Alternate hypothesis (Ha): population mean is greater than 5
Z = (sample mean - population mean) ÷ (sd/√n)
sample mean = 5.3, population mean = 5, sd = 1, n = 500
Z = (5.3 - 5) ÷ (1/√500) = 0.3 ÷ 0.045 = 6.67
Using the normal distribution table, for a one tailed test at 0.01 significance level, the critical value is 2.326
Conclusion:
Since 6.67 is greater than 2.326, reject the null hypothesis (H0)
Answer:
16
24
12.8
Step-by-step explanation:
20:12
i think. 20 being the number of total students to 12 which is the number of boys
Answer:
4800m³
Step-by-step explanation:
V== =4800
16r^2+ 2r -4r
16r^2 - 2r
2r ( 8r -1)