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Naddik [55]
3 years ago
7

The choice between a z-test and a t-test for a population mean depends primarily on:

Mathematics
1 answer:
Tom [10]3 years ago
6 0
Z-test should be used when the parent standard deviation is known and the sample size is greater than or equal to 30 (to satisfy the Central Limit Theorem). A T-test should be used when these two rules do not apply.
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An equilateral triangle has an altitude of 45. Find the length of a side of the triangle.
sukhopar [10]

Answer:

See attachment.

If altitude = 45 then

side = 2 * height (or altitude) / square root of 3

side = 2 * 45 / 1.7320508076

side = 90 / 1.7320508076

side = 51.9615242271

Step-by-step explanation:

6 0
4 years ago
HELP:Sarah, who is 19 feet away from Justin, has a ball in her hand. Sarah throws the ball away from Justin at a speed of 5 feet
Paha777 [63]

Answer:

Justin is 1 feet far away from Brandon

Step-by-step explanation:

As shown in the diagram, we let the distance between Justin and Brandon be x

Speed = \frac{distance}{time}

from the question

the total time taken by the ball to reach Brandson=4s

Also the total distance is travelled by the ball=19+x

while the average speed=5ft/s

By substitution we obtain

5 =  \frac{19 + x}{4}

\implies4 \times 5 = 19 + x

\implies20=19 + x

\implies20 - 19 =  x

x=1 feet

3 0
3 years ago
Assuming the pattern continues, what are the next three terms in the pattern: Z, x, V, t, ______?
Nookie1986 [14]
I believe the answer is 4) R, p, N. I hope this helps
5 0
3 years ago
For each of the values of h given, when x is increased from 1 to 1+h, work out:
borishaifa [10]
<span>This exercise should show you that as h approaches zero you get the value of the derivative of x^2 at x=1.

</span><span>the change in x^2) / h
   h=1___
   h=.1____
   h=0.1_____
   h=.001___
</span>
<span>change in x^2 = (1+h)^2 - 1^2 = (1+h)^2 - 1</span>
5 0
3 years ago
Use the list method to write "The perfect square integers between 1 and 80 inclusive".
xenn [34]
I don't know the list method you have learned.
<span>The perfect square integers between 1 and 80 inclusive are ...

1
4
9
16
25
36
49
64
 </span>

6 0
4 years ago
Read 2 more answers
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