Answer: 2.5
Step-by-step explanation:
Let
be the population mean .
Then, Null hypothesis : ![H_0:\mu\leq46](https://tex.z-dn.net/?f=H_0%3A%5Cmu%5Cleq46)
Alternative hypothesis : ![H_1:\mu>46](https://tex.z-dn.net/?f=H_1%3A%5Cmu%3E46)
We assume that this is a normal distribution.
Given : Sample size : n=25 , since the sample is small (n<30) so we cannot apply z-test . Thus the test is t-test.
Sample mean : ![\overline{x}=50](https://tex.z-dn.net/?f=%5Coverline%7Bx%7D%3D50)
Population standard deviation : ![\sigma= 8](https://tex.z-dn.net/?f=%5Csigma%3D%208)
The test statistic for population mean is given by :-
![t=\dfrac{\overline{x}-\mu}{\dfrac{\sigma}{\sqrt{n}}}](https://tex.z-dn.net/?f=t%3D%5Cdfrac%7B%5Coverline%7Bx%7D-%5Cmu%7D%7B%5Cdfrac%7B%5Csigma%7D%7B%5Csqrt%7Bn%7D%7D%7D)
i.e. ![t=\dfrac{50-46}{\dfrac{8}{\sqrt{25}}}=2.5](https://tex.z-dn.net/?f=t%3D%5Cdfrac%7B50-46%7D%7B%5Cdfrac%7B8%7D%7B%5Csqrt%7B25%7D%7D%7D%3D2.5)
Hence, the observed critical value = 2.5
Answer:
i mean i think im fine, kinda been a long stressful day,
Step-by-step explanation:
thank you<3
Answer:
B
Step-by-step explanation:
Make a commone demonatore my multiplying.
Answer:2(27+73)
Step-by-step explanation:
The number is 16
16/4 = 4
16 - 12 = 4 (true)
your number is 16 hope this helps