Final answer:
The number of hours with a biorhythm level of 4.545 cannot be determined without biorhythm data. However, the daily energy needs can be calculated using MET values from Table 7.5 and a hypothesis testing involves statistical methods to make inferences from samples.
Step-by-step explanation:
To answer the question regarding the number of hours in a week when a person's biorhythm level is greater than or equal to 4.545, specific biorhythm data over a weekly period would be required. Since the provided information does not mention biorhythms or provide the necessary data to calculate such levels, but instead offers various scenarios involving daily energy needs and probability questions, a direct calculation for biorhythm levels cannot be performed.
However, for the purpose of practicing problem-solving, an explanation can still be given for the calculation of daily energy needs as outlined in the provided scenario. To calculate the daily energy requirements, one would reference Table 7.5 (which contains the metabolic equivalent (MET) values for various activities), and multiply the MET value for each activity by the number of hours spent performing it. The sum of these products would give the total energy requirement for the day.
Hypothesis testing and probability questions, such as constructing confidence intervals and determining significance levels, are statistical methods used to make inferences about populations from samples, and are also in the realm of mathematics but require more context and data to answer.