The Next Questions Are Based on the Following Information

question 103

Multiple Choice

The Next Questions Are Based On The Following Information:
A hydraulic press is operating correctly when the standard deviation of the pressure is less than 120 pounds-per-square-inch (psi) .Suppose you take a random sample of 15 measurements throughout the day of the psi and find the standard deviation to be 148.Suppose you want to test whether the press is operating correctly.
-A random sample of size 10 is selected from a normal population,where the population standard deviation is unknown.Assume that a two-tailed test at the 0.10 significance level is to be used.For what value of t will the null hypothesis not be rejected?

• A)to the left of -1.812 or to the right of 1.812
• B)to the left of -1.372 or to the right of 1.372
• C)to the left of -1.833 or to the right of 1.833
• D)to the left of -1.383 or to the right of 1.383

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Definitions:

Saliva

A watery secretion from the salivary glands in the mouth, aiding in digestion and oral lubrication.

Lymph

A clear fluid that circulates throughout the lymphatic system, carrying white blood cells and supporting the body's immune system.

B Lymphocytes

A type of white blood cell that plays a crucial role in the immune system by producing antibodies to fight infections.

Basophils

White blood cells that play a role in immune responses by releasing histamine and other chemicals involved in inflammation.