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# Statistics and Probability

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1) The time that students spend studying per week is normally distributed with a mean of 8.4 hous and stadard deviation of 2.7 hours. Find te probability that the mean time spent studying pere week for a random fo 45 students would be less than 8 hours .

2) A survey of corporations showed that 64% of them offer retirement plna to theri employees. In a sample of 50 sycg corporations that offer retimrent plans to theri employees, find the probability that the sample proportion will be greater than 71%.

## [Solved] Statistics and Probability

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- Submitted On 28 Oct, 2020 04:25:26

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### statistics maths 510

### Create an inferential statistics (hypothesis) test using the research question and two variables

### Expert Only - Exam Due Sunday Statistics Need A! Economic Statistics and Probability

### PLEASE HELP ME IT IS URGENT!!!!

### STATS QUESTIONS

Answer: (a) True (b) False (c) True (d) False (e) False Justification: a) The standard deviation is the positive square root of variance so it cant be negative. b) A and B disjoint so there is no common region between them...