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3 years ago

At 10:00 AM Han and Tyler

1 answer:

6 0

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4x + 16/12 What is the value of x in the equation= x - 4?

ANTONII [103]

I hope this helps, if any doubt leave a comment

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2 years ago

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

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3 years ago

Veseljchak [2.6K]

The answer is i think 262.08 miles

8 0

2 years ago

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Plz help on 4,8 really need answers to get some point

mafiozo [28]

4) The line segments formed are parallel because they never meet.

8) The answer is B. That is because there is a right angle and right angles are formed by perpendicular lines.

Hope this helps :)

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3 years ago

Brianna has 4 pink bracelets. One third of all her bracelets are pink. How many braclets does Brianna have?

liq [111]

Brianna has 12 braclets

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3 years ago

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