What type of number is 3-77i
2 answers:
Answer:
Option 3 - complex number
Step-by-step explanation:
Given : Number
To find : What type of number is given ?
Solution :
Real numbers include all rational and irrational numbers.
Pure Imaginary number includes only imaginary term i.e. i
Complex number is the combination of real and imaginary number.
We have given, Number
Where, 3 is the real number and 77i is imaginary number.
So, The number is a complex number.
Therefore, Option 3 is correct.
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Answer:
The degrees of freedom are given by:
The p value for this case would be given by:
Since the p value is higher than the significance level we have enough evidence to FAIL to reject the null hypothesis and we can conclude that the true deviation is not ignificantly lower than 5 minutes
Step-by-step explanation:
Information given
represent the sample size
represent the confidence level
represent the sample variance
represent the value that we want to verify
System of hypothesis
We want to test if the true deviation for this case is lesss than 5minutes, so the system of hypothesis would be:
Null Hypothesis:
Alternative hypothesis:
The statistic is given by:
And replacing we got:
The degrees of freedom are given by:
The p value for this case would be given by:
Since the p value is higher than the significance level we have enough evidence to FAIL to reject the null hypothesis and we can conclude that the true deviation is not ignificantly lower than 5 minutes