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Mathematics

2 answers:

IrinaK [193]3 years ago

8 0

Answer:

Step-by-step explanation:

Mariulka [41]3 years ago

6 0

Mean of week one = 27.142
Mean of week two = 31.42

Answer is C

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1.99 ÷ 3 =

kobusy [5.1K]

Hope I helped:)
1. 33
2. 25
3. 8
4. 45
5. 9

8 0

3 years ago

Read 2 more answers

You are playing a game of Scrabble and have the 5 A tiles, 3 E tiles, 1 Z tile, 2 M tiles, 3 L tiles, and 1 Y tile to choose fro

BigorU [14]

When calculating probability, the easiest thing to do is first count how many things there are to choose from.

5 + 3 + 1 + 2 + 3 + 1 = 15 Also, there are 3 E tiles, and 1 Y tile. 3 + 1 = 4

The probability of you drawing a E or Y tile is 4 / 15

7 0

3 years ago

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:

$z_{\alpha/2}= \pm 0.994$