Answer:
Part A: yes
Part B: 50%
Step-by-step explanation:
There are two ways we can use a normal approximation for a sample: if the population it is from is normally distributed, or if the sample is sufficiently large (n > 30). In this case, we don't know if the population is normally distributed, but we do know the sample size is larger than 30, so we can use normal approximation.
The sample proportion is normally distributed, with a mean equal to the mean of the population. So there is a 50% chance that sample proportion is less than the population proportion.
Answer:
2.9
Step-by-step explanation:
11.02÷3.8= 2.9
Answer:110k per minute
Step-by-step explanation: 30 seconds is half of a minute, so you multiply 30 seconds by 2 to get the rate per minute, 110k.
Answer:
The correct value of the Z-statistic is z = -1.56
Step-by-step explanation:
A company manufacturing computer chips finds that 8% of all chips manufactured are defective.
This means that the null hypothesis is:
A hypothesis test is performed to determine if the additional training was effective in lowering the defect rate.
This means that the alternate hypothesis is:
z-statistic:
In which X is the sample mean, 
is the value tested at the null hypothesis, 
is the standard deviation and n is the size of the sample.
0.08 is tested at the null hypothesis:
This means that 
After training was implemented, a sample of 450 chips revealed only 27 defects.
This means that 
The correct value of the Z-statistic is
Answer:
8
Step-by-step explanation:
The slope-intercept form of the equation of a line is ...
y = mx + b
where m represents the slope, and b represents the y-intercept.
When you compare this form to the given equation, you can match the parts and see that ...
m = 8
b = 8
The slope of the line, m, is 8.
