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Pani-rosa [81]
2 years ago
9

I HIT 80 SUBS !!!!! if you want to help out my yt is 999 Trendy TYSMMMM ill give brainliest if u help. hope i get helpes :(

Mathematics
1 answer:
Dafna1 [17]2 years ago
6 0

Answer:

ill sub if i can find your account

Step-by-step explanation:

You might be interested in
Bart ran 5000 from the cop and an average speed of 6 meters/ seconds before he got caught. how long did he run?
Masja [62]

Answer:

13.8 minutes

Step-by-step explanation:

5000/6= 833/60

3 0
3 years ago
Item 4<br> Write the word sentence as an inequality.<br><br> A number b is at least −3.
never [62]

Answer:  b≥-3

Step-by-step explanation:

at least means that it's great or equal than -3.

b≥-3

7 0
3 years ago
Tim has twice as many marbles as Luke together they have 39 marbles how many marbles does time have
Travka [436]
Tim has 2 times as luke
t=2l
they have 29 goether
t+l=39
subsitute
2l+l=39
3l=39
divide by 3
l=13

subsitue
t=2l
t=2(13)
t=26


tim has 26 and luke has 13
I don't know how many marble Tim has but probably all of them since alll must die and then the marbles go to Time
3 0
3 years ago
Read 2 more answers
Suppose the heights of a population of people are normally distributed with a mean of 65.5 inches and a standard deviation of 2.
kupik [55]

Answer:

a) P(64.2

b) 69.764

Step-by-step explanation:

1) Previous concepts

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".

2) Part a

Let X the random variable that represent the heights of a population, and for this case we know the distribution for X is given by:

X \sim N(65.5,2.6)

Where \mu=65.5 and \sigma=2.6

We are interested on this probability

P(64.2

And the best way to solve this problem is using the normal standard distribution and the z score given by:

z=\frac{x-\mu}{\sigma}

If we apply this formula to our probability we got this:

P(64.2

And we can find this probability on this way:

P(-0.50

And in order to find these probabilities we can find tables for the normal standard distribution, excel or a calculator.

P(-0.50

3) Part b

For this part we want to find a value a, such that we satisfy this condition:

P(X>a)=0.05   (a)

P(X   (b)

Both conditions are equivalent on this case. We can use the z score again in order to find the value a.

As we can see on the figure attached the z value that satisfy the condition with 0.95 of the area on the left and 0.05 of the area on the right it's z=1.64. On this case P(Z<1.64)=0.95 and P(z>1.64)=0.05

If we use condition (b) from previous we have this:

P(X  

P(z

But we know which value of z satisfy the previous equation so then we can do this:

z=1.64

And if we solve for a we got

a=65.5 +1.64*2.6=69.764

So the value of height that separates the bottom 95% of data from the top 5% is 69.764.

5 0
3 years ago
Helllp me!! Need answer right now!!! Please!!!
posledela
POINT C..............................................................
6 0
3 years ago
Read 2 more answers
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