if star represent your country is it day or night how do you know
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Answer:
a hospital based cross-sectional study, it is planned to estimate the mean D-dimer level among COVID-19 patients. From previous literature, the standard deviation was found to be 200 ng/mL. If the researchers want to estimate the mean with a 50 ng/mL precision and 95% significance level, what is the minimum sample size required?
Answer:
There is no justfied answer to it .It doesn't necessarily mean that if star represent a country it is night or day , considering the fact that stars are seen at night, through they are always present but can be seen only at night . Day and night is a concept that every country follow no matter how days it may take to have a sun rise or sunset , especially in the areas near the pole. Therefore, star representing a country is not related to the night or the morning. So ,you can't know whether it is day or night on the basis of the stars representing the country.