The answer is in my attachment
In a race, the-second place finisher crossed the finish line 1 1/3 minutes after the winner. The third-place finisher was 1 3/4
2 answers:
Answer:
First Winner take 31.95 minute time to complete race.
Step-by-step explanation:
Since the third winner take minutes to complete the race.
Second winner take minutes less than Third Winner.
Thus Second winner take
Also, First winner take minutes less time.
Thus first winner take time = =31.95 minutes
You might be interested in
Answer:
The confidence interval will be given by:
, in which z is related to the confidence level.
For a confidence level of x%, z is the value in the z-table that has a pvalue of
Step-by-step explanation:
Central Limit Theorem
The Central Limit Theorem estabilishes that, for a normally distributed random variable X, with mean and standard deviation
, the sampling distribution of the sample means with size n can be approximated to a normal distribution with mean
and standard deviation
.
For a skewed variable, the Central Limit Theorem can also be applied, as long as n is at least 30.
In the context of this problems:
It means that the sampling distributions of the sample mean of 500 components will be approximated normal, with mean 200,000 and standard deviation
To build the confidence interval:
The confidence interval for the average length of life of the electronic components they produced will be given by:
, in which z is related to the confidence level.
For a confidence level of x%, z is the value in the z-table that has a pvalue of