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Lelechka [254]
3 years ago
12

LetXbe a continuous random variable with densityf(x) ={3e−3x,whenx >0,0,elsewhere.(a) Verify thatfis a density function.(b) C

alculateP(−1< X <1).(c) CalculateP(X <5).(d) CalculateP(2< X <4|X <5).(e) Find the cumulative distribution function ofX.(f) Find theEXandEe2X.(g) Find the variance ofX.
Mathematics
1 answer:
makkiz [27]3 years ago
6 0

Answer:

7

Step-by-step explanation:

Explanation:

Length(l), breadth and height of cube are of same measure.

Volume of cube of length

l

is

v

=

l

3

;

v

=

216

∴

l

3

=

216

or

l

=

3

√

216

=

6

cm , therefore,

Length of three dimensions of the cube is

6

cm. [Ans]

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Answer:

The claim on the M&M’s website is not true.

Step-by-step explanation:

A Chi-square test for goodness of fit will be used in this case.

The hypothesis can be defined as:

<em>H</em>₀: The observed frequencies are same as the expected frequencies.

<em>Hₐ</em>: The observed frequencies are not same as the expected frequencies.

The test statistic is given as follows:

\chi^{2}=\sum\limits^{n}_{i=1}{\frac{(O_{i}-E_{i})^{2}}{E_{i}}}

Here,

O_{i} = Observed frequencies

E_{i}=N\times p_{i} = Expected frequency.

The chi-square test statistic value is, 14.433.

The degrees of freedom is:

df = <em>k</em> - 1 = 6 - 1 = 5

Compute the <em>p</em>-value as follows:

p-value=P(\chi^{2}_{k-1} >14.433) =P(\chi^{2}_{5} >14.433) =0.013

*Use a Chi-square table.

The significance level is, <em>α</em> = 0.05.

p-value = 0.013 < <em>α</em> = 0.05.

So, the null hypothesis will be rejected at 5% significance level.

Thus, concluding that the claim on the M&M’s website is not true.

6 0
3 years ago
Using the equation x= 12- 3y, complete the ordered pair (___,-5).
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3 years ago
Camila drove 30 miles per hour to get to her math class. what is the dependent quantity
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What is the missing reason in the proof? Statement Reason 1. m || n and p is a transversal 1. given 2. ∠2 ≅ ∠3 2. ver. ∠s theore
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Answer:

See below for answer.

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