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Arada [10]
3 years ago
12

Can someone help please and (if you can)explain how to get the answer pls

Mathematics
1 answer:
Illusion [34]3 years ago
4 0

Answer: 980 newtons

Step-by-step explanation:

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The average household income for a recent year was $30,000. five years earlier the average household income was $24,500. assume
ikadub [295]

Using hypothesis test, we conclude that there is evidence to believe that the average household income has increased.

According to the question,

The average household income for a recent year (x₁⁻) = $30,000

The average household income for a recent year (x₂⁻) = $24,500

sample sizes n₁ = n₂ = 34

standard deviation of both samples were $24,500. Thus, s₁ = s₂ = $5928.

Null hypothesis:  There is no evidence to believe that the average household income has increased.

H₀ : μ₁ ≤ μ₂

Alternative hypothesis:  There is evidence to believe that the average household income has increased.

H₁: μ₁ > μ₂  

To check hypothesis we have the formula

Standard error=  \sqrt{\frac{s_{1} ^{2} }{n_{1} } + \frac{s^{2} _{2} }{n_{2} }  }

= \sqrt{2067128.4706}

= 1437.7512

Thus, standard error is $1437.7512.

Formula for test statistic = [(x₁⁻ -  x₂⁻) - (μ₁ - μ₂)]/standard error

= [(30000 -  24500) - 0]/1437.7512

= 3.8254

The critical value of z at 5% level of significance is 1.6449.

Here, the calculated value is greater than the critical value so we reject H₀.

Hence using hypothesis test, we conclude that there is evidence to believe that the average household income has increased.

Learn more about hypothesis test here

brainly.com/question/15060525

#SPJ2

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2 years ago
Is 7/8 or 11/10 closer to 1
Firlakuza [10]
10. Find which one of the given fractions are value closer to 1. First = 7/8 Second = 11/10 Let’s start solving Let us start with the first value which is 7/8 => 7 needs to be divided with 8 => 7 / 8 = 0.875 Now, let’s solve the second value which is 11/10 => same with first solution., divide 11 by 10 => 11 / 10 => 1.1 Thus, 11/10 is the has the nearest value to 1.
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Take 10.56 divided by 8 to get 1.32
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Answer:

It’s 4

Step-by-step explanation:

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What is the product?
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For the a factor in a 1 and then do the problem once you find the product plug your a back in 
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