Answer:
<u>The difference in areas:</u>
- 124 - 34 = 90 square feet
<u>Percent increase:</u>
Answer: A
Step-by-step explanation:
Answer:
D
Step-by-step explanation:
Answer:
The machine should be set at a mean weight of 51.23 kg.
Step-by-step explanation:
Problems of normally distributed samples are solved using the z-score formula.
In a set with mean and standard deviation , the zscore of a measure X is given by:
The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.
In this problem, we have that:
At what mean weight should the machine be set so that only 5% of the bags are underweight contain less than 50kg of sand?
We want 50 to be the 5th percentile.
So when X = 50, Z has a pvalue of 0.05. So when X = 50, Z = -1.645. We use this to find the mean weight
The machine should be set at a mean weight of 51.23 kg.
Answer:
Positive association is correct
Step-by-step explanation: The dots form are going up, forming a positive line. If they were to go down they would be negative. So in this case positive association is correct