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Statistics and Probability

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Moderate

Null and Alternative Hypotheses about Newborn Infants

STATS-EZNGGD

The historical data of newborn infants at a regional hospital shows that an average weight of newborn infants is $6.6$ pounds. A question raised by the hospital is that they believe that an average weight of newborn infants has been increased in the past year.

A random sample of weights from $7$ newborn infants was recorded as $9, 7.3, 6, 8.8, 6.8, 8.4,$ and $6.6$ pounds.

What is the null hypothesis for this study?

A

Null: $µ ≤ 6.6$

B

Null: $µ ≥ 6.6$

C

Null: $µ ≥ 7.6$

D

Null: $µ ≤ 7.6$