answersLogoWhite

0

Research indicates that more boys tend to smoke methamphetamine compared to girls. However, the gap has been narrowing in recent years as the rates of meth use among girls have increased. Various factors, including socio-economic status and mental health issues, can influence these trends. Overall, while boys historically have higher rates of use, the dynamics are changing.

User Avatar

AnswerBot

2mo ago

What else can I help you with?

Continue Learning about Statistics

Do boys make more than girls?

Yes, boys do make more money. Look at Bill Gates, then the girl at the McDonald's drive-thru.


Why are new driver insurance rates so much higher for boys than for girls?

Driver insurance rates are higher for boys than for girls because it has been proven statistically that boys are more likely to get into car accidents than girls.


What would a boys waist size 14 pants be in a mans size waist?

A boys' waist size 14 typically corresponds to a men's waist size of about 30 to 32 inches. However, sizing can vary by brand, so it's a good idea to check specific sizing charts for the brand in question. Generally, boys' sizes are smaller and more fitted compared to men's sizes, which often have a more relaxed fit.


What is the probability of getting at least 2 boys out of 3 children?

As asked - this question has no calculable answer as it depends on the genetics of the parents but ...If we assume, to make the problem a little easier, that the odds of a boy are equal to the odds of a girl, then p(boy)=p(girl)=.5 Now, at least two boys means odd of 2 or 3 boys out of three children.The formula for finding k successes, (let's call a boy a success ONLY because that is what we are looking for) out of n trials (births) is P(n,k)=n!/(n-k)!k! (p)^k(q)^n-k ( note that the first part of this formula is 3Cn where n is 2 or 3 in this case.So P(2,3)=3x2x1/2x1(.5)^2(.5) =3(.25)(.5)=.375 and P(3,3)=3x2x1/3x2x1(.5)^3(.5)^0 =.125 Now add these two probabilities .375+.125=.5You could also just do a tree, with just the three children:B.G/ \B.G B.G/ . | . | . \B.G B.G B.G B.GThe first row is the first child, then if it's a boy, look to the left half. If the first one is a girl, look to the right half. So for 3 boys, follow the very left-hand path (B-B-B).There are 4 possibilities that yield 2 or more boys (out of the 8 total possibilities). These are {BBB, BBg, BgB, gBB}. I bolded the bottom-row ones that are the path to 2 or more boys. Probability = 4/8 = 0.5, or 50%. Doing this validates that the first method is correct (the graphical method becomes unwieldy when more events are added).One important rule to use in any problem that asks at least is the complement rule.The idea is simple. P(No boys )+ P( 1 boy) + P(2 boys) + P(3 boys)=1 since those are all the possible outcomes. We subtract P( No boys) and P(1 boy ) from both sides and we haveP(at least 2)=1-P(none)-P(1). In this case no boys means GGG and the chance of that is(1/2)^3 or 1/8. Also one Girl can be GBB, BGB or BBG and each has a 1/8 chance so the three together have a 3/8 chance. This means P( as least two boys)= 1-1/8-3/8 or 1-4/8=4/8 or 50%The "at least method is very useful when looking at large numbers of outcomes. For example, chance of at least 1 boy in 100 children. The tree would be hard to make and the binomial formula would take a long time to use. However 1-P(none) would give you the answer in a minute. It is 1-(1/2)^100.


In a recent year 23.3 of Americans smoked cigarettes. What is the probability that in a random sample of 200 Americans more than 50 smoke?

It is approx 28%.

Related Questions