Reports say that the mean birth weight of babies of European heritage is 3.5kg. Marta wants to perform a significance test to see if this holds true in her nation. She takes a random sample of babies...

Reports say that the mean birth weight of babies of European heritage is 3.5kg. Marta wants to perform a significance test to see if this holds true in her nation. She takes a random sample of babies and observes a mean birthweight of xˉ=3.43 kg. with,

Here's Marta's null hypothesis:

H₀The mean birth weight in this nation is...