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3 years ago

Which expressions are equivalent when m=1 and m=4

Mathematics

2 answers:

Leviafan [203]3 years ago

8 0

Answer:

option 2

Step-by-step explanation:

DerKrebs [107]3 years ago

7 0

The second one is
the right answer.
(i think i’m right i’m sorry if i’m not !)

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A survey of 25 randomly selected customers found the ages shown (in years). The mean is 32.64 years and the standard deviation i

____ [38]

Answer:

See below for answers and explanations

Step-by-step explanation:

Assuming that conditions have been met for the interval, we use the formula $\displaystyle CI=\bar{x}\pm t\frac{s}{\sqrt{n}}$ where $\bar{x}$ represents the sample mean, $t$ represents the critical value, $s$ represents the sample standard deviation, and $n$ is the sample size.

The critical value of $t$ for an 80% confidence level with degrees of freedom $df=n-1=25-1=24$ is equivalent to $t=1.317836$

Thus, we can compute the confidence interval:

$\displaystyle CI=\bar{x}\pm t\frac{s}{\sqrt{n}}\\\\CI=32.64\pm1.317836\biggr(\frac{9.39}{\sqrt{25}}\biggr)\\\\CI\approx\{30.17,35.11\}$

Therefore, we are 80% confident that the true mean age of all customers is between 30.17 and 35.11 years.

The margin of error is $\displaystyle t\frac{s}{\sqrt{n}}=1.317836\biggr(\frac{9.39}{\sqrt{25}}\biggr)\approx2.47$

6 0

2 years ago

In an experiment, the probability that event A occurs is

AnnZ [28]

Answer:

1/63

Step-by-step explanation:

Here is the complete question

In an experiment, the probability that event A occurs is 1 /7 and the probability that event B occurs is 1 /9 .

If A and B are independent events, what is the probability that A and B both occur?

Simplify any fractions.

Solution

the probability of independent events A and B occurring is P(A u B) = P(A)×P(B) where P(A) = probability that event A occurs = 1 /7 and P(B) = probability that event B occurs = 1 /9 .

So, P(A u B) = P(A)×P(B) = 1/7 × 1/9 = 1/63

7 0

4 years ago

Read 2 more answers

The annual Gross Domestic Product (GDP) of a country is the value of all of the goods and services produced in the country durin

sammy [17]

Is there a multiple choice

6 0

4 years ago

Can somebody help me plz

Marta_Voda [28]

It would be 90m3 because all the angles are the same