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I have 7 questions that I would require an answer for


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Answered 1 days AfterDec 13, 2022

Answer To: Question 2Flag questionN (69,46Question 3 Flag questior140 PM© n3a00Question...

Monica answered on Dec 15 2022
28 Votes
1)
When the population standard deviation is unknown we use t distribution to calculate the test statistic
s. Therefore, here the t – critical value will be used to find the confidence interval.
Use the excel function,
This will give the required answer that is, option D)
2)
Given –
and the sample size is equal to 30
It is asked to find the critical value for the 90% of sample means will lie below
Use the excel function which will give the value as - 1.282
3)
Given –
To solve this problem, we can use the Poisson distribution, which is often used to model the number of times an event occurs within a given time period. In this case, the event is a patient arriving at the clinic, and the time period is 20 minutes.
The Poisson distribution is defined by the following formula:

Where, X is the random variable representing the number of times the event occurs, λ is the average rate at which the event occurs, and k is the number of times the event occurs.
In this problem, we are trying to find the probability that the next two patients arrive...
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