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3 years ago

Per (in meters) 3.23 3.18 3.22 3.19

Mathematics

1 answer:

alisha [4.7K]3 years ago

3 0

Answer:

Can you please be more specific what do I convert it to.

Step-by-step explanation:

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The following function is probability mass function. f left-parenthesis x right-parenthesis equals StartFraction 2x plus 1Over 2

lora16 [44]

Answer:

a) Mean = 2.6

B) Variance = 9.2

Step-by-step explanation:

We are given the following probability mass function in the question:

$F(x) = \dfrac{2x+1}{25}, x = 0,1,2,3,4$

a) Mean of random variable

$\mu = \displaystyle\sum x_iF(x_i)\\\\=0(\dfrac{1}{25}) + 1(\dfrac{2+1}{25}) + 2(\dfrac{4+1}{25}) + 3(\dfrac{6+1}{25}) + 4(\dfrac{8+1}{25})\\\\=\dfrac{3+10+21+36}{25} = \dfrac{70}{25} = 2.8$

b) Variance of the random variable

$\sigma^2 = \displaystyle\sum x_i^2F(x_i)\\\\=0^2(\dfrac{1}{25}) + 1^2(\dfrac{2+1}{25}) + 2^2(\dfrac{4+1}{25}) + 3^2(\dfrac{6+1}{25}) + 4^2(\dfrac{8+1}{25})\\\\=\dfrac{3+20+63+144}{25} = \dfrac{230}{25} = 9.2$

6 0

3 years ago

Plz answer quick ..........

ira [324]

Answer:

Shade the first row (the row of three) going down.

Step-by-step explanation:

There are 6 rows. One of six rows would be the first row.

5 0

3 years ago

45.2 is what % of 200?

nikitadnepr [17]

It is 22.6 percent.

It got this answer by halving 45.2.

8 0

3 years ago

Read 2 more answers

Kim started hiking at 10:40 AM. She stopped for lunch at 1:10 PM, having hiked an average rate of 3 miles per hour. How far did

Kazeer [188]

So first find time elapsed
10:40-11:40=1
11:40-12:40=1
12:40-1:10=0.5 or 30 mins

so add
1+1+0.5=2.5, 2 hours 30 mins

3 miles per hour
3 times numberof ohours
3 times 2.5
7.5

answer is 7.5 miles

8 0

3 years ago

The tax on a $40 item is $2.00.<br> Find the tax on a $150 item.

NemiM [27]

Answer:

if the tax on a $40 item is $2.00.

then a $150 item would be <u>$156.00</u>

5 0

4 years ago