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3 years ago

If I drink decaffeinated coffee, then I do not stay awake.

Mathematics

1 answer:

marishachu [46]3 years ago

6 0

Answer:

the statements are not equivalent

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Help please!!!!

Sonja [21]

Answer:

you already put this one

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3 years ago

The amount of time Ricardo spends brushing his teeth follows a Normal distribution with unknown mean and standard deviation. Ric

Papessa [141]

Let $X$ denote the number of minutes spent brushing his teeth, and let $\mu$ be the mean and $\sigma$ the standard deviation for this distribution.

$\mathbb P(X$

The z-score corresponding to this probability is approximately $z=-0.2533$ , which means

$\dfrac{1-\mu}\sigma=-0.2533\iff\mu-0.2533\sigma=1$

Next, (note the sign change)

$\mathbb P(X>2)=0.02\implies\mathbb P(X\le2)=\mathbb P\left(\dfrac{X-\mu}\sigma\le\dfrac{2-\mu}\sigma\right)=0.98$

The corresponding z-score is approximately $z=2.0538$ , so you have

$\dfrac{2-\mu}\sigma=2.0538\iff\mu+2.0538\sigma=2$

Solving the two equations for $\mu$ and $\sigma$ , you'll find that the mean is approximately $\mu=1.1098$ and the standard deviation is approximately $\sigma=0.4334$ .

7 0

3 years ago

937 divided by 7 plz help me

attashe74 [19]

133.857142857 I’m not completely sure

7 0

3 years ago

Read 2 more answers

Yoshiko is a real estate agent. This

Serhud [2]

Answer:

5,750-2,480=3270

Step-by-step explanation:

5,750-2,480=3270

5 0

2 years ago

a six sided number cube has faces with the numbers 1 through 6 marked on them. what is the probability that a number less than 3

mars1129 [50]

Answer:

Step-by-step explanation:

Total outcomes

1, 2, 3, 4, 5, 6 - six

Favorable outcomes

1, 2 - two

Probability

P( < 3) = favorable outcomes / total outcomes = 2/6 = 1/3

6 0

2 years ago