Answer: t=-5.651
Explanation:
Let
be the population mean number of hours a week answering their email.
As per given we have

Sample size : n= 783
Sample mean : 
Sample standard deviation: s=7.23
Since population standard deviation is unknown, so our test -statistic has a t-distribution.
Test statistic : 

∴ The test statistic : t=-5.651
Answer:
frequency
Explanation:
The frequency of the voice can tell a lot about the age of the speaker, even if we don't see them.
<u>Children tend to have a very high frequency of the voice - it is what we hear as children's high pitched or squeaky voice, which helps us distinguish it is them.</u><u> </u>
<u>Men's voices, when they speak normally, go up to 155Hz, women's up to 255Hz, but children's voices are raging between 250 Hz to 300Hz, or even higher.</u><u> </u>
<u>In most cases, children will have a higher frequency of the voice than any full-grown adult. </u>
It is also noted that even older people, as they age, have notable changes in voice. Adult men that usually have low voice frequency tend to have a higher and higher frequency of the voice as they age. Women go through a different process - they have a high frequency of the voice and during the aging process, it lowers down notably according to studies.
The answer is: the iron law of oligarchy
the iron law of oligarchy refers to the theory that all forms of organization would eventually filled with people that eventually taking advantage of their position in the organization in order to take as much benefit as they can, no matter how democratic that organization started off with.
This theory is based on basic human nature that tend to have tendencies to never develop a sense of satisfaction and had overwhelming desire to keep acquiring more in our life. We can see this in Vic's attitude that start to leverage his position to gain favor.