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3 years ago

Can you help meeeeeee this is math and there have to be not one answer many like 3,2 and some time 1 ok Thankyou

Mathematics

1 answer:

pochemuha3 years ago

4 0

Answer:m=134

Step-by-step explanation:

that's the only correct answer

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g Suppose the investigators had made a rough guess of 0.14 for the value of the sample standard deviation, s, before collecting

Arada [10]

Answer:

The sample size is $n =326$

Step-by-step explanation:

From the question we are told that

The rough estimate of the standard deviation is $\sigma = 0.14$

The interval width is $w = 0.04$

Generally the margin of error is mathematically represented as

$E = \frac{w}{2}$

=> $E = \frac{0.04}{2}$

=> $E = 0.02$

From the question we are told the confidence level is 99% , hence the level of significance is

$\alpha = (100 - 99 ) \%$

=> $\alpha = 0.01$

Generally from the normal distribution table the critical value of $\frac{\alpha }{2}$ is

$Z_{\frac{\alpha }{2} } = 2.58$

Generally the sample size is mathematically represented as

$n = [\frac{Z_{\frac{\alpha }{2} } * \sigma }{E} ] ^2$

=> $n = [\frac{ 2.58 * 0.14 }{0.02} ] ^2$

=> $n =326$

6 0

3 years ago

What is 4 divided by one seventh

suter [353]

The answer is 28 hope this helps!!!

3 0

3 years ago

Read 2 more answers

Which point lies on a circle that is centered at A(-3, 2) and passes through B(1, 3)?

My name is Ann [436]

The equation of a circle:
$(x-h)^2+(y-k)^2=r^2$
(h,k) - the coordinates of the center
r - the radius

$\hbox{the center: } A(-3,2) \\
h=-3 \\ k=2 \\ \\
\hbox{the equation:} \\
(x+3)^2+(y-2)^2=r^2 \\ \\
\hbox{the circle passes through B(1,3)} \\
x=1 \\ y=3 \\ \Downarrow \\
(1+3)^2+(3-2)^2=r^2 \\
4^2+1^2=r^2 \\
16+1=r^2 \\
17=r^2 \\ \\
\hbox{the equation is:} \\
(x+3)^2+(y-2)^2=17$

Plug the coordinates of the points into the equation and check:
$C(-1,-2) \\
(-1+3)^2+(-2-2)^2=17 \\
2^2+(-4)^2=17 \\
4+16=17 \\
20=17 \\
not \ true \\ \\
D(-6,3) \\
(-6+3)^2+(3-2)^2=17 \\
(-3)^2+1^2=17 \\
9+1=17 \\
10=17 \\
not \ true$

$E(-3,-3) \\
(-3+3)^2+(-3-2)^2=17 \\
0^2+(-5)^2=17 \\
25=17 \\
not \ true \\ \\
F(-2,6) \\
(-2+3)^2+(6-2)^2=17 \\
1^2+4^2=17 \\
1+16=17 \\
17=17 \\
true$

The answer is F(-2,6).

8 0

3 years ago

In circle U below, VT = 90 inches.

Gennadij [26K]

Answer:

Step-by-step explanation:

The formula should be

s= $\frac{104}{360}$ 2 $\pi$ r