a-university-claims-the-average-weight-of-textbooks-for-its-engineering-students

Question

A university claims that the average weight of textbooks for its engineering students is $7.5$ pounds. A random sample of $36$ engineering students' textbook weights is taken, yielding a sample mean of $6.8$ pounds. If the population standard deviation is known to be $1.8$ pounds, what is the probability of obtaining a sample mean of $6.8$ pounds or less?

Accepted Answer

$P of open paren x ˉ is less than or equal to 6.8 close paren almost equals 0.0099$

Answer

$P of open paren x ˉ is less than or equal to 6.8 close paren almost equals 0.0099$

Answer

$P of open paren x ˉ is less than or equal to 6.8 close paren almost equals 0.0099$

Answer

$P of open paren x ˉ is less than or equal to 6.8 close paren almost equals 0.0099$