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:
The Concrete Operative Stage
Explanation:
According to Piaget in the Concrete Operative Stage the child begins to deal with concepts such as numbers, measures and relationships. This stage comes to manifest more clearly what coincides (or should coincide) with the beginning of formal schooling, that is, with elementary school. It is characterized by consistent internal logic and the ability to solve concrete problems. In the case of the child shown in the question, we can see that she has a notion, even if very correct, of the amount of juice she had and because of that amount she worked out a reason why the amount of juice she had decreased. Because of this reasoning ability, we can conclude that this child is in the concrete operative stage.
Agriculture, to infrastructure activities, to tourist attractions
D. Launching a filibuster
Filibustering has long been a source of outside interest for the US Senate. Traditionally, 60 votes or a "supermajority" are needed to vote to end a filibuster. In 2013, Sen. Harry Reid pushed for an amendment that would require only a simple majority when it came to judicial and executive branch nominees (the Senate's Advise and Consent role) and the Republicans recently expanded this to the Supreme Court.
