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skelet666 [1.2K]
2 years ago
7

PLEASE HELP MEEEE READ AND ANSWER

Mathematics
1 answer:
Lena [83]2 years ago
5 0

Answer:

A. 8/3

B. -27/35

Step-by-step explanation:

keep change flip

keep the first fraction the same, change division to multiplication, and flip the other  fraction.For example 1/4 becomes 4/1.

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The wall street journal corporate perceptions study 2011 surveyed readers and asked how each rated the quality of management and
malfutka [58]

Answer:

Hello some parts of your question is missing below is the missing part

answer : A) p-value =  0.0019 ,

The level of significance ( 0.05 ) > p-value ( 0.0019 )

B) There is no dependence between the two ratings

Step-by-step explanation:

A) using a 0.05 level of significance and test for independence of the quality of management

Test statistic : X^{2}  ∑ ( Oi - Ei )^2 / Ei

= [(40-35)^2 / 35 ] +  [(25-24.5)^2 / 24.5 ] +  [(5-10.5)^2 / 10.5]  +  [(35-40)^2 / 40]  +  [(35-28)^2 / 28]  +  [(10-12)^2 / 12]  +   [ (25-25)^2 / 25 ]  +  [(10-17.5)^2 / 17.5 ]  + [(15-7.5)^2 / 7.5]  =  17.03  

p-value = 0.0019

Df = 4  ,

The level of significance ( 0.05 ) > p-value ( 0.0019 )

B) There is no dependence between the two ratings

4 0
2 years ago
Please helppp meeeeeeee
natka813 [3]

Answer:

i dont know if this is right but i think that would be the second one

Step-by-step explanation:

i dont know if this is right but i think that would be the second one

3 0
3 years ago
In a certain​ country, the true probability of a baby being a girl is 0.469. Among the next seven randomly selected births in th
-BARSIC- [3]

Answer:

The probability is 0.995 ( approx ).

Step-by-step explanation:

Let X represents the event of baby girl,

The probability of a baby being a girl is, p = 0.469,

So, the probability of a baby who is not a girl is, q = 1 - 0.469 = 0.531,

Also, the total number of experiment, n = 7

Thus, by the binomial distribution formula,

P(x)=^nC_x(p)^x q^{n-x}

Where, ^nC_x=\frac{n!}{x!(n-x)!}

The probability that all babies are girl or there is no baby boy,

P(X=7)=^7C_7(0.469)^7(0.531)^{7-7}

=0.00499125661758

Hence, the probability that at least one of them is a boy​ = 1 - P(X=7)

= 1 - 0.00499125661758

= 0.995008743382

≈ 0.995

8 0
3 years ago
How do I answer this question?
ankoles [38]
It's 78.38
You have to square root
8 0
3 years ago
I need help with this question? Please and thank you!!!!<br> #15
4vir4ik [10]
Ref3vygrnvrgnubub  frrrrrrrrvcrf
7 0
2 years ago
Read 2 more answers
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