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The manager of a computer retails store is concerned that his suppliers have been giving him laptop computers with lower than average quality. His research shows that replacement times for the model laptop of concern are normally distributed with a mean of 4.1 years and a standard deviation of 0.4 years. He then randomly selects records on 39 laptops sold in the past. Round the answers of following questions to 4 decimal places. What is the distribution of X
a. What is the distribution of X? X ~ N(___,____)
b. What is the distribution of ¯xx ~ N(____,_____)
c. What is the probability that one randomly selected laptop is replaced less than 4 years?
d. For 39 laptops, find the probability that the average replacement time is less than 4 year?
e. For part d), is the assumption of normal necessary? Yes or No
the below two question must have a minimum 250 word count and use examples to support the solution. only use usa based
1. when an engineer wants to send a binary signal a 0 or 1 signal through a communication channel assume that there is
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