![subject](/tpl/images/cats/mat.png)
Mathematics, 28.11.2019 00:31 saadizak7098
The shape of the distribution of the time required to get an oil change at a 15 minute facility is unknown. however, records indicate that the mean time is 16.1 minutes and the standard deviation is 4.6 minutes.
a) to compute the probabilities regarding the sample mean using the normal model, what size sample would be required?
b) what is the probability that a random sample of n = 40 oil changes results in a sample mean time of less than 15 minutes?
a) choose the required sample size:
1. the normal model cannot be used if the shape is unknown
2. sample size need to be greater than 30
3. sample size needs to be less than 30
4. any sample size could be used.
b) the probability is approximately? (round to 4 decimal places as needed)
![ansver](/tpl/images/cats/User.png)
Answers: 3
![](/tpl/images/ask_question.png)
![](/tpl/images/ask_question_mob.png)
Another question on Mathematics
![question](/tpl/images/cats/mat.png)
Mathematics, 21.06.2019 17:30
In a probability experiment, karen flipped a coin 76 times. the coin landed on heads 32 times. what percentage of the coin flips resulted in tails? round to the nearest percent. a. 58% b. 65% c. 42% d. 60%
Answers: 2
![question](/tpl/images/cats/mat.png)
Mathematics, 21.06.2019 20:30
Which steps could be part of the process in algebraically solving the system of equations, y+5x=x^2+10 and y=4x-10
Answers: 2
![question](/tpl/images/cats/mat.png)
Mathematics, 21.06.2019 23:00
If you apply the changes below to the linear parent function f(x)=x what is the equation of the new function vertically stretched by a factor of 3 flip over the x axis
Answers: 2
![question](/tpl/images/cats/mat.png)
Mathematics, 22.06.2019 00:30
Brent paid for 6 avocados with a $20.00 bill. he received $10.40 in change. construct and solve an equation can be used to find the price , of each avocados
Answers: 1
You know the right answer?
The shape of the distribution of the time required to get an oil change at a 15 minute facility is u...
Questions
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 17.02.2021 18:30
![question](/tpl/images/cats/en.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 17.02.2021 18:30
![question](/tpl/images/cats/mat.png)
Mathematics, 17.02.2021 18:30
![question](/tpl/images/cats/himiya.png)
![question](/tpl/images/cats/mir.png)
World Languages, 17.02.2021 18:30
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 17.02.2021 18:30
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/istoriya.png)
![question](/tpl/images/cats/obshestvoznanie.png)
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 17.02.2021 18:30
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/fizika.png)
Physics, 17.02.2021 18:30
![question](/tpl/images/cats/mat.png)
Mathematics, 17.02.2021 18:30
![question](/tpl/images/cats/biologiya.png)
Biology, 17.02.2021 18:30
![question](/tpl/images/cats/health.png)
Health, 17.02.2021 18:30