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a_sh-v [17]
3 years ago
12

For a normal population with a mean of m = 80 and a standard deviation of s = 10, what is the probability of obtaining a sample

mean greater than m = 75 for a sample of n = 25 scores? p = 0.0062 p = 0.9938 p = 0.3085 p = 0.6915
Mathematics
1 answer:
igomit [66]3 years ago
5 0

what do pre and post test studies look at?data collected on the same sample elements before and after some experiment is performedwhen are the t procedures exactly correct?when the pop is exactly Normal (rare)the t procedures are robust to small deviations from Normality, butthe sample must be a random sample from the pop
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Let u=XY where X(-4, 6) and Y(8,3). What is 12 ul?<br> 6/17<br> 18<br> 3/17<br> 612
Sergeeva-Olga [200]

Answer:

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Step-by-step explanation:

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3 years ago
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Whats 100*100??? please help
Svetllana [295]

Answer: 100*100=10,000

thanks for the points :))

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3 years ago
At a bus station, buses begin their routes at 6.Am. The schedule for two of the buses is based on time intervals listen below
kykrilka [37]

Answer:

They will both leave at 07:15am

Step-by-step explanation:

Given

Start\ time = 6:00am

Bus\ A=75\ mins

Bus\ B=15\ mins

Required

Next time both buses leave the station at the same time

To do this, we list out the multiples of 75 and 15.

We have:

Bus\ A = 0,75, 150, 225, 300,375, 450, 525, 600 ....

Bus\ B =0, 15,30,45,60,75,90,105,120,135,150,165,180.....

After the first departure at 06:00 am (0 minutes) for both buses respectively, the next time they both leave is after 75 minutes (common multiple)

So, the time is:

Time = 6:00am + 75 mins

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3 0
3 years ago
An investor bought 700 shares of stock, some at $2.25 per share and some at $2.75 per share. If the total cost was $1825.00, how
statuscvo [17]

The shares of $2.25 are 200 and the shares of $2.75 are 700.

According to the question,

We have the following information:

An investor bought 700 shares of stock, some at $2.25 per share and some at $2.75 per share. And the total cost was $1825.00.

Now, let's take the shares of $2.25 to be x and the shares of $2.75 to be y.

So, we have the following expression:

x+y = 700

x = 700-y ....(1)

2.25x+2.75y = 1825 ...(2)

Putting the value of x from equation 1:

2.25(700-y)+2.75y = 1825

1575-2.25y+2.75y = 1825

1575+0.5y = 1825

0.5y = 250

y = 250/0.5

y = 500

Now, putting the value of y in equation 1:

x = 700-y

x = 700-500

x = 200

Hence, the shares of $2.25 are 200 and the shares of $2.75 are 700.

To know more about shares here

brainly.com/question/21781662

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7 0
1 year ago
The point (4, 3) is reflected across the x-axis. In what quadrant will the new coordinate be?
lawyer [7]

It will be in the fourth quadrant

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2 years ago
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