Question

describe the null hypothesis and alternate hypothesis and say whether the hypothesis test is two-tailed, left-tailed, or right-tailed, then conduct the test and state the proper conclusion. You must show the details of your calculations.

Specific Electric Company makes a circuit that is advertised to initiate an alarm if the power supplied to a machine reaches 100 volts. A random sample of 250 switches is tested and the mean voltage at which the alarm occurs is 98 volts with a sample standard deviation of 3 volts. Test the hypothesis that the mean voltage activation is different from the stated value at a 5% level of significance.

Answer #1

The null and alternative hypotheses are given. Determine whether
the hypothesis test is left-tailed, right-tailed, or two-tailed.
What parameter is being tested? H0: σ=4.2 H1: σ≠4.2
Choose the correct answer below. Two-tailed,Left-tailed,
Right-tailed
What parameter is being tested? μ,σ, p

fine whether the the following statment is a two-tailed,
left-tailed, or right-tailed test.
i)The manager of Danvers Hilton Resort Hotel stated that the
mean guest bill for a weekend is $600 or less. A member of the
hotel’s accounting staff noticed that the total charges for guest
bills have been increasing in recent months. The accountant will
use a sample of weekend guest bills to test the manager’s
claim.
ii)A production line operation is designed to fill cartons
with laundry...

State the null and alternate hypothesis.
Will you use a left tail, right tail or 2 tailed test?
Identify the sampling distribution to be used: standard normal,
Student’s t or chi squared.
Find the value of the test statistic.
Find the P-Valu
Based on your answers, shall we reject or accept the null
hypothesis?
Write the conclusion in the context of the problem.
Flying time on an old route between 2 cities has a mean
value of =5.25 hours with...

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