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Mekhanik [1.2K]
3 years ago
11

Steve watched television for 3/4 hour on monday and 5/6 hour on tuesday how much longer did he watched television on tuesday tha

n monday

Mathematics
1 answer:
Trava [24]3 years ago
3 0
Like that I think so 5 mins

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A lathe is set to cut bars of steel into lengths of 6 cm. The lathe is considered to be in perfect adjustment if the average len
Gnom [1K]

Answer:

t=\frac{5.97-6}{\frac{0.4}{\sqrt{93}}}=-0.723    

E. -0.723

df=n-1=93-1=92  

p_v =2*P(t_{(92)}  

Since the p value is very high we don't have enough evidence to conclude that the true mean for the lengths is different from 6 cm.

Step-by-step explanation:

Information provided

\bar X=5.97 represent the sample mean for the length

s=0.4 represent the sample standard deviation

n=93 sample size  

\mu_o =6 represent the value that we want to test

\alpha=0.05 represent the significance level

t would represent the statistic  

p_v represent the p value for the test

System of hypothesis

We need to conduct a hypothesis in order to check if the lathe is in perfect adjustment (6cm), then the system of hypothesis would be:  

Null hypothesis:\mu = 6  

Alternative hypothesis:\mu \neq 6  

since we don't know the population deviation the statistic is:

t=\frac{\bar X-\mu_o}{\frac{s}{\sqrt{n}}}  (1)  

Replacing in formula (1) we got:

t=\frac{5.97-6}{\frac{0.4}{\sqrt{93}}}=-0.723    

E. -0.723

P value

The degrees of freedom are given by:

df=n-1=93-1=92  

Since is a two tailed test the p value would be:  

p_v =2*P(t_{(92)}  

Since the p value is very high we don't have enough evidence to conclude that the true mean for the lengths is different from 6 cm.

5 0
3 years ago
7(5-4x) in distributive property
kati45 [8]

Answer:

Distributive Property : <em><u>a(b+c)= ab+ac</u></em>

  • 7(5-4x) = (35-28x) ★
<h3><u>(35-28x)</u> is the right answer.</h3>
3 0
3 years ago
Simplify the expression using the distributive property 9(4y-7)
lbvjy [14]
Multiply what is outside the parenthesis by what is inside.
the answer is 36y-63
hope i helped!!
5 0
3 years ago
Read 2 more answers
Simplify the expression. (d² - d+5) - (-d² + d + 5)​
AysviL [449]

Answer: 2d^2-2d

Step-by-step explanation:

Given

\Rightarrow (d^2-d+5)-(-d^2+d+5)\\\Rightarrow (d^2+d^2)-d-d+5-5=0-2d+0\\\Rightarrow 2d^2-2d=2d(d-1)

8 0
3 years ago
Determine if the given set is a subspace of set of prime numbers P 2. Justify your answer. The set of all polynomials of the for
devlian [24]

Answer:

All polynomials of the p=at² where a is in R is a subspace Pn for an appropriate value of n do not fulfill the condition and hence do not form the subspace

Step-by-step explanation:

Check attachment

7 0
3 years ago
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