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3 years ago

Consider the equations below.

2 answers:

4 0

x=−200347 and y=−600347

Harman [31]3 years ago

4 0

The answer isx=−200347 and y=−600347

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A recent study focused on the number of times men and women send a Twitter message in a day. The information is summarized below

jok3333 [9.3K]

Answer:

The value of the test statistic = 2.58

Test statistic Z = - 4.805

|Z| = 4.805 > 2.58

Null hypothesis is rejected The value of the test statistic = 2.58

There is significant difference between in the mean number of times men and women send a Twitter message in a day

Step-by-step explanation:

Step(i):-

Sample size of men n₁ = 25

mean of the first sample x₁⁻ = 20

Standard deviation of the first sample σ₁ = 5

Sample size of women n₂ = 30

mean of the second sample x₂⁻ = 30

Standard deviation of the first sample σ₂ = 10

Level of significance ∝= 0.01

Step(ii):-

Null Hypothesis : H₀: There is no significant difference between in the mean number of times men and women send a Twitter message in a day

Alternative Hypothesis :H₁:There is significant difference between in the mean number of times men and women send a Twitter message in a day

Test statistic

$Z = \frac{x^{-} _{1} - x^{-} _{2} }{\sqrt{\frac{S.D_{1} ^{2} }{n_{1} }+\frac{ S.D_{2} ^{2}}{n_{2} } } }$

$Z = \frac{20 - 30 }{\sqrt{\frac{(5)^{2} }{25 }+\frac{ (10)^{2} }{ 30} } }$

Z = $\frac{-10}{2.081} = - 4.805$

The value of the test statistic = 2.58 C

|Z| = 4.805 > 2.58

Null hypothesis is rejected The value of the test statistic = 2.58

Conclusion:-

There is significant difference between in the mean number of times men and women send a Twitter message in a day

7 0

3 years ago

What is the surface area of a right circular cylinder with a diameter of 14 meters and a height of 9 meters

Umnica [9.8K]

Answer:

This is your answer ☺️☺️☺️

4 0

3 years ago

Need. help please give answer for this if its right ill mark brainiest 2(5x+2)=2x+20

White raven [17]

Answer:

x=2

Step-by-step explanation:

10x+4=2x+20

10x-2x=20-4

8x=16

x=2

8 0

3 years ago

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Jacksons fotball team won 70%of the games that they played.if they won 14 games how many total games did they play

Luden [163]

Answer:

20 gmaes in all

Step-by-step explanation:

14/x = 70%

x = 14/70%

4 0

3 years ago

Two friends are renting an apartment. They pay the landlord the first month’s rent. The landlord also requires them to pay an ad

UNO [17]

So you could do $1725/3 (divided by) which would give you 575 then mulitply that by two and that will give you the months rent of, $1,150. I hope this helps!

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3 years ago

Read 2 more answers