In tests of a computer component, t isfund tht the mean time betveen falures is 910 hours. A modfication is made which is supposed to increase reliabity by increasing the time between falres. Tests on a sample of 36 modfied components produce a mean time between falures of 956 hours. Using a 5% level of signficance, perform a hypothess test o determine whether the mean time between falures for the modfe omponents is greater than 910 hous. Asume that the populton standard devaton is 57 hours. Ho : µ = 956 hours Hị : µ >956 hours O Test statistic : z = 4.84 Critical value :z= 1.65 Reject the null hypothesis. There is sufficient evidence to support the claim that, for the modified components, the mean time between failures is greater than 956 hours. Ho : µ > 956 hours Hị : µ = 956 hours O Test statistic : z=4.84 Critical value : z = 2.33 Reject the null hypothesis. There is sufficient evidence to support the claim that, for the modified components, the mean time between failures is greater than 956 hours. Ho : µ = 910 hours Hị : µ >910 hours Test statistic : z- 4.84 Critical value : z- 1.65 Reject the null hypothesis. There is sufficient evidence to support the claim that, for the modified components, the mean time between failures is greater than 910 hours. Ho : µ >956 hours Hị : = 956 hours O Test statistic : z -95.79 Critical value :z- 2.33 Reject the null hypothesis. There is sufficient evidence to support the claim that, for the modified components, the mean time between failures is greater than 956 hours.

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Unitary Method

The word “unitary” comes from the word “unit”, which means a single and complete entity. In this method, we find the value of a unit product from the given number of products, and then we solve for the other number of products. 

Speed, Time, and Distance

Imagine you and 3 of your friends are planning to go to the playground at 6 in the evening. Your house is one mile away from the playground and one of your friends named Jim must start at 5 pm to reach the playground by walk. The other two friends are 3 miles away.

Profit and Loss

The amount earned or lost on the sale of one or more items is referred to as the profit or loss on that item.

Units and Measurements

Measurements and comparisons are the foundation of science and engineering. We, therefore, need rules that tell us how things are measured and compared. For these measurements and comparisons, we perform certain experiments, and we will need the experiments to set up the devices.