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3 years ago

6

An event begins at 2:35 a.m. and lasts for 4 hours and 23 minutes. What is the end time?

2 answers:

vlabodo [156]3 years ago

8 0

2:35 am

add the 4 hours

6:35 am

then add 23 minutes
35 + 23 = 58

6:58 am is when the event ends

rewona [7]3 years ago

4 0

The event ends at 6:58 p.m .

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Step-by-step explanation:

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4 years ago

what is the probability of seeing a sample mean for 21 observations less or equal to the sample mean that we observed

kramer

Answer:

$P(x \le 21) = 0.69146$

Step-by-step explanation:

The missing parameters are:

$n = 64$ --- population

$\mu = 20$ --- population mean

$\sigma = 16$ -- population standard deviation

Required

$P(x \le 21)$

First, calculate the sample standard deviation

$\sigma_x = \frac{\sigma}{\sqrt n}$

$\sigma_x = \frac{16}{\sqrt {64}}$

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