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Effectus [21]
3 years ago
13

WILL GIVE BRAINLIEST!!

Mathematics
1 answer:
joja [24]3 years ago
4 0

Answer:

#4

Step-by-step explanation:

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Suppose that the mean time that visitors stay at a museum is 94.2 minutes with a standard deviation of 15.5 minutes. The standar
Maurinko [17]

Answer:

94.2 -0.994*3.1 = 91.1186

94.2 +0.994*3.1 = 97.2814

And the 68% confidence interval is given by (91.1186, 97.2814)

Step-by-step explanation:

For this case we know that mean time that visitors stay at a museum is given by:

\bar X = 94.2

The standard deviation is given by:

s= 15.5

And the standard error is given by:

SE = \frac{s}{\sqrt{n}} =3.1

And we want to interval captures 68% of the means for random samples of 25 scores and for this case the critical value can be founded like this using the normal standard distribution or excel:

z_{\alpha/2}= \pm 0.994

We can find the interval like this:

\bar X \pm ME

And replacing we got:

94.2 -0.994*3.1 = 91.1186

94.2 +0.994*3.1 = 97.2814

And the 68% confidence interval is given by (91.1186, 97.2814)

7 0
3 years ago
Your aunt gives you $50 to help buy the reflector telescope shown. After you buy the telescope, you have $35.50. How much money
disa [49]

Answer:

$0?

Step-by-step explanation:

Sorry I'm very confused by this question

8 0
2 years ago
Read 2 more answers
Find the measures of 21 and 2
KatRina [158]
Measure 1 would be 59 degrees (180-121)
Measure 2 would be 121 degrees (vertical angle theorem)
6 0
2 years ago
Sarah goes to a bakery to buy doughnuts for work.
frosja888 [35]

Answer:

The equation i came up with is $55= 7.8x - 47.20

5 0
2 years ago
8. Find an equation in standard form for the ellipse with the vertical major axis of length 16 and minor axis of length 4
MA_775_DIABLO [31]

Hello,

If center is (0,0)

x²/a²+y²/b²=1 for a half horizontal axis of a, and a half vertical axis of b

Here

a=2 ==> a²=4

b=8 ==> b²=64

\boxed{\dfrac{x^2}{4}+ \dfrac{y^2}{64}=1}\\

3 0
3 years ago
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