Answer:3600
Explanation:I’ve done this question before!
The proportion of left-handed people in the general population is about 0.1. Suppose a random sample of 225 people is observed.
1. What is the sampling distribution of the sample proportion (p-hat)? In other words, what can we say about the behavior of the different possible values of the sample proportion that we can get when we take such a sample?
(Note: normal approximation is valid because .1(225) = 22.5 and .9(225) = 202.5 are both more than 10.)
2. Since the sample proportion has a normal distribution, its values follow the Standard Deviation Rule. What interval is almost certain (probability .997) to contain the sample proportion of left-handed people?
3. In a sample of 225 people, would it be unusual to find that 40 people in the sample are left-handed?
4. Find the approximate probability of at least 27 in 225 (proportion .12) being left-handed. In other words, what is P(p-hat ? 0.12)?
Guidance: Note that 0.12 is exactly 1 standard deviation (0.02) above the mean (0.1). Now use the Standard Deviation Rule.
Answer:
For a triangle the area is base×height ÷2
Step-by-step explanation:
19×4=76
76/2=38
5 7/8 - 2 9/10
we can make 5 7/8 into an improper fraction of 47/8
we can also make 2 9/10 into an improper fraction of 29/10
find a common multiple between the denominators 10 and 8 - the smallest would be 40
47/8 will be made into 235/40
29/10 will be made into 116/40
235/40 - 116/40 = 119/40
simplify 119/40 and you get 2 39/40
decimal form is 2.975
Answer: 436.36 mph
Step-by-step explanation:
m=mph
5.5m=2400
m=2400/5.5
m=436.3636 mph
m=436.36 mph
