Suppose a regional computer center wants to evaluate the performance of its disk memory system. one measure of performance is the average time between failures of its disk drive. to estimate this value, the center recorded the time between failures for a random sample of 45 disk-drive failures. the following sample statistics were computed: s . 215 hours # 1,762 hours estimate the true mean time between failures with a 90% confidence interval. a) ) if the disk memory system is running properly, the true mean time between failures will exceed 1,700 hours. based on the interval, in part a, what can you infer about the disk memory system?

a) solved in attachment

b)  If disk is running properly time between failure will exceed then Upper 90 % would be good indicator.

Step-by-step explanation:

the clues that signal the reader should change tone are the punctuation marks, the grammatical signs. for example, the quotation marks at the beginning of something someone else said literally or the exclamation marks.

the tone of the first line of dialogue until "gettysburg" is a kind tone, a tone of advise. the narrator is trying to the other person in doing something he or she obviously is finding hard to do by giving a piece of advise and bringing up a memory of a successful similar case.

the clue that the reader understand how to read the word "bang" is the exclamation mark. it gives the word a surprise tone, a strong accent.

the best tone for reading the word "bang" is an exciting tone, a surprise one, even a loud one.

the words that should be read with a formal tone are the ones that give factual information. the sentence: mister lincoln couldn't think of anything to say at the gettysburg" gives information about an event and it needs to be read formally, also, when the narrator wants to transmit calmness, a formal and slow tone is needed, because people also transmit messages with the vibrations of our voices and tones.

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step-by-step explanation: