You could work backwards. -9+5 = -4. Then, -4-2 = -6.
It was -6°C at 3 p.m.
Hope that helped you.
Answer:
d) The additional training did not significantly lower the defect rate
Step-by-step explanation:
Let proportion of defective chips be = x
Null Hypothesis [H0] : Additional training has no impact on defect rate x = 8% = 0.08
Alternate Hypothesis [H1] : Additional training has impact on defect rate x < 8% , x < 0.08
Observed x proportion (mean) : x' = 27 / 450 = 0.06
z statistic = [ x' - x ] / √ [ { x ( 1-x ) } / n ]
( 0.06 - 0.08 ) / √ [ 0.08 (0.92) / 450 ]
= -0.02 / √ 0.0001635
= -0.02 / 0.01278
z = - 1.56
Since calculated value of z, 1.56 < tabulated value of z at assumed 0.01 significance level, 2.33
Null Hypothesis is accepted, 'training didn't have defect rate reduction impact' is concluded
In problems of probability, it is best to find out the sample space or all the possible outcomes from throwing 3 coins in the air.
S = {HHH, TTT, HHT....}
The condition is at least 2 landed on heads (that means 2 or more). From the sample space, that can only be {<span>THH, </span>HHT, HTH, and HHH}.
Therefore, the probability is 3/4 since there are a total of 8 possible outcomes.
Answer:
In the polygon there are as many vertices as there are sides. The triangle has 3 sides and 3 vertices. The quadrilateral has 4 sides and 4 vertices. The pentagon has 5 sides and 5 vertices.
Try to figure out what this means and this should help
Step-by-step explanation:
