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ioda
3 years ago
6

Enter a number in the blank so the equation will have no solution

Mathematics
2 answers:
prisoha [69]3 years ago
7 0

Answer: 7

Step-by-step explanation:

seropon [69]3 years ago
7 0
7w. .... s. X. F. G dc do
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In preparation for upcoming wage negotiations with the union, the managers for the Bevel Hardware Company want to establish the
Snowcat [4.5K]

Answer:

t=\frac{42-40}{\frac{8}{\sqrt{120}}}=2.739  

The p value for this case would be given by:

p_v =2*P(z>2.739)=0.0616  

Since the p value is lower than the significance level of 0.05 we have enough evidence to conclude that the true mean for the assembly time is significantly different from 40 minutes.

Step-by-step explanation:

Information provided

\bar X=42 represent the sample mean for the assembly time

s=8 represent the sample deviation

n=120 sample size  

\mu_o =40 represent the value to verify

\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 want to conduct a hypothesis in order to see if the true mean is equal to 40 minutes or not, the system of hypothesis would be:  

Null hypothesis:\mu =40  

Alternative hypothesis:\mu \neq 40  

The statistic for this case is given by:

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

Replacing the info given we got:

t=\frac{42-40}{\frac{8}{\sqrt{120}}}=2.739  

The p value for this case would be given by:

p_v =2*P(z>2.739)=0.0616  

Since the p value is lower than the significance level of 0.05 we have enough evidence to conclude that the true mean for the assembly time is significantly different from 40 minutes.

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The answer to your question is:

Step-by-step explanation:

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