A Machine Cuts Steel to Length for Nails

question 21

Short Answer

A machine cuts steel to length for nails. The mean length of a nail is 43 millimeters. There is concern that the settings of the machine producing the nails have changed. To test the claim, twelve nails (n = 12) were sampled. The mean of the sample is 41.5 and the standard deviation is 1.784. To test the claim at the 0.02 significance level, what is the critical value?

---

Definitions:

Oxytocin

A hormone and neurotransmitter involved in childbirth and lactation, also playing a role in social bonding and behavior.

Calcitonin

A hormone produced by the thyroid gland that helps regulate calcium levels in the blood.

Kidneys

Pair of bean-shaped organs located in the back of the abdomen that filter waste products from the blood and excrete them as urine.

Collecting Ducts

A network of tubules and ducts that function in the kidney to transport urine from the nephrons to the renal pelvis.