Answer:
-3.75
Step-by-step explanation:
The question refers to the fact that we calculate the value of z in order to know how successful the random sample is in terms of probabilities:
z = (x -m) / (sd / n ^ (1/2))
where x is the value to evaluate, that is to say 55 kg, the standard deviation is sd and would be 20 kg, m is the mean that is 70 and n the size of the random sample that is 25, replacing we are left with:
z = (55 - 70) / (20/25 ^ (1/2))
z = -3.75
this value represents practically 0%, making the sampling that was made very unlikely
The answer is going abc tam
To solve this problem you must apply the proccedure shown below:
1. You have to r<span>ewrite x=12 in polar form. Then, you have:
12=rCos</span><span>θ
2. Then, you must solve for r, as following:
r=12/Cos</span><span>θ
</span> 3. You have that 1/Cosθ=Sec<span>θ, therefore:
</span> r=12(1/Cos<span>θ)
</span> r=12Sec<span>θ
</span> Therefore, as you can see, the answer is: r=12Secθ<span>
</span>
Answer:
D( the last) : The proportion of students who got their grandparents wired is about 0.52