We first calculate the z-score corresponding to x = 1075 kWh. Given the mean of 1050 kWh, SD of 218 kWh, and sample size of n = 50, the formula for z is:
z = (x - mean) / (SD/sqrt(n)) = (1075 - 1050) / (218/sqrt(50)) = 0.81
From a z-table, the probability that z > 0.81 is 0.2090. Therefore, the probability that the mean of the 50 households is > 1075 kWh is 0.2090.
Answer:
(2x-3)(x-4)
Step-by-step explanation:
Percentage of 9th graders that said no is approx. 14%
Percentage of opposers that were 9th graders is approx 6%
Answer:
1.5 inches
Step-by-step explanation:
half of four miles so half of 3 inches
Answer:
1 x 10^10
2 x 10^-10
7 x 10^-11
8 x 10^-11
Step-by-step explanation:
