Using the normal distribution and the central limit theorem, it is found that:
a) The probability is 0.6395.
b) The probability is 1.
c)
The probability from part (a) is more relevant because it shows the proportion of male passengers that will not need to bend.
d)
B. Since men are generally taller than women, a design that accommodates a suitable proportion of men will necessarily accommodate a greater proportion of women.
In a normal distribution with mean and standard deviation , the z-score of a measure X is given by:
In this problem:
Item a:
This probability is the p-value of Z when X = 70, thus:
has a p-value of 0.6395.
Thus, the probability is 0.6395.
Item b:
Samples of size 100, thus .
This probability is the p-value of Z when X = 70, thus:
By the Central Limit Theorem:
has a p-value of 1.
The probability is 1.
Item c:
We want don't want many people to have to bend, thus, part a has to be considered.
Item d:
Generally, men are taller, so if the design accommodates the men, it will accommodate the women, and the correct option is:
B. Since men are generally taller than women, a design that accommodates a suitable proportion of men will necessarily accommodate a greater proportion of women.
A similar problem is given at brainly.com/question/24663213
Answer:
a) 0.6406; b) 1.000; c) C. The probability from part (a) is more relevant because it shows the proportion of male passengers that will not need to bend; d) B. Since men are generally taller than women, a design that accommodates a suitable proportion of men will necessarily accommodate a greater proportion of women.
Step-by-step explanation:
For part a,
We use the formula for the z score of an individual,
Our mean, μ, is 69 and our standard deviation, σ, is 2.8. To find P(X < 70),
z = (70-69)/2.8 = 1/2.8 = 0.36
Using a z table, we see that the area under the curve to the left of this value is 0.6406. This is our probability.
For part b,
We use the formula for the z score of a sample,
Our mean is still 69 and our standard deviation is still 2.8. Our sample size, n, is 100. To find P(X < 70),
z = (70-69)/(2.8÷√100) = 1/(2.8÷10) = 1/0.28 = 3.57
Using a z table, we see the area under the curve to the left of this is greater than 0.9999. This means that the probability is 1.000.
For part c,
We want to know the proportion of male passengers that will not need to bend. This is why the value from part a is more important.
For part d,
Men taller on average than women. This means if we accommodate for the mean, it follows that the women will fit as well.
Answer:
The baker baked 375 loaves of bread that day.
Step-by-step explanation:
Let the baker baked a total of x loaves of bread.
240 loaves were sold by the end of the day.
The baker was then left with 9/25 of the number of loaves that were baked.
We get the equation:
Solving for x;
=>
=>
=>
=>
x = 375
Therefore, the baker baked 375 loaves of bread that day.
Answer: 5.3
Step-by-step explanation: To solve this question, all you need to do is add the numbers together. 1.6+3.7=5.3
Answer:
the answer is5.3
Step-by-step explanation:
3.7+1.6=5.3
Answer:
5000mg,500g, 50kg
you have to know that 5000mg=5 grams
Add 7, and then divide by 6.
Divide by 6, and then add 7.
Subtract 7, and then divide by 6.
Divide by 6, and then subtract 7.