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3 years ago

8

Indicate the first step in the universal order of operation

2 answers:

ra1l [238]3 years ago

8 0

Parentheses is the first step

Natali [406]3 years ago

3 0

The universal order of operation is addition, subtraction, multiplication, division, exponentiation, and grouping. One thing to remember these is PEMDAS which is P for please, E for excuse, M is for my, D is for dear, A is for aunt, S is for Sally. PEMDAS actually means parentheses, Exponents, Multiplication, Division, Add, and Subtract.. Hope this helps!

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A snail can travel 390 inches in 5 hours. How far does it travel in 10 minutes?

kipiarov [429]

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Identify the CONCLUSION of a hypothesis test of the following claim and sample data: Claim: "The average annual household income

Hatshy [7]

Complete Question

The options for the above question is

a There is not sufficient evidence to warrant rejection of the claim.

b There is sufficient evidence to warrant rejection of the claim.

c There is sufficient evidence to support the claim.

d There is not sufficient evidence to support the claim.

Answer:

Option A is correct

Step-by-step explanation:

From the question we are told that

The population mean is $\mu =$ $47,500

The sample size is $n = 86$

The sample mean is $\= x =$ $48,061

The standard deviation is $\sigma =$ $2,351

The level of significance is $\alpha = 0.02$

The null hypothesis is

$H_o : \mu =$ $47,500

The alternative hypothesis is

$H_a : \mu \ne$ $47,500

The critical value of $\alpha$ from the t-Distribution table is $Z_{\frac{\alpha }{2} } = 2.326$

Now the test statistics is mathematically evaluated as

$t = \frac{\= x - \mu }{ \frac{\sigma }{\sqrt{n} } }$

substituting values

$t = \frac{48061 - 47500 }{\frac{2351}{\sqrt{86} } }$

$t = 2.21$

Now from the values obtained we can see that

$Z_{\frac{\alpha }{2} } > t$

hence we fail to reject the null hypothesis

Hence there is not sufficient evidence to warrant rejection of the claim

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3 years ago

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