Answer:
The second answer option
Step-by-step explanation:
Lmk if you need explanation
Answer:
So the value of the test statistic is -0.85.
Step-by-step explanation:
We know that a sample of 1800 computer chips revealed that 53% of the chips do not fail in the first 1000 hours of their use. The company's promotional literature states that 54% of the chips do not fail in the first 1000 hours of their use.
We get that:

We calculate the standar deviation:

We calculate the value of the test statistic:

So the value of the test statistic is -0.85.
Answer:
1:500
Step-by-step explanation:
Since it has already given you the conversion factor, the ratio is 1:500, where every 1 cm is 500 km.
Answer:
X=7
Step-by-step explanation:
7*15=105 7-2=5 5*25=125 125+105=230