3 years ago

Can someone please help me with these 3 questions I’ll mark brainliest

Mathematics

1 answer:

pshichka [43]3 years ago

7 0

Answer:

2/ triple need video for the third answer

Step-by-step explanation:

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An educational psychologist wishes to know the mean number of words a third grader can read per minute. She wants to make an est

amid [387]

Answer:

(38.1,88.6)

Step-by-step explanation:

We are given the following in the question:

Sample mean, $\bar{x}$ = 38.3

Sample size, n = 695

Alpha, α = 0.05

Population standard deviation, σ = 3.6

95% Confidence interval:

$\mu \pm z_{critical}\frac{\sigma}{\sqrt{n}}$

Putting the values, we get,

$z_{critical}\text{ at}~\alpha_{0.05} = 1.96$

$38.3 \pm 1.96(\frac{3.6}{\sqrt{695}} ) = 38.3 \pm 0.267 = (38.033,38.567) \approx (38.1,88.6)$

8 0

3 years ago

Can someone pls help me with the middle one?:( plss

VashaNatasha [74]

Answer:

Step-by-step explanation:

It appears the most in the expression.

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2 years ago

Read 2 more answers

Angela is going on vacation to Mexico. She needs to buy new shirts for her trip. She buys 10 new shirts that cost her a total of

const2013 [10]

After I answer this, can you answer my question

8 0

3 years ago

Which relation is not a function

KiRa [710]

By definition a function can have only one value of y for any given value of x.

Since B. contains both (-1,2) and (-1,0), y has two values for the same value of x and thus B. cannot be a function...

5 0

3 years ago

Find the Area of a circle with a radius of 6 cm.

Mandarinka [93]

The answer is B 113.04

Explanation
Assuming pi in this instance is 3.14
The formula for the area of a circle is A=(pi)r^2
Plug in the radius
A=3.14x6^2
Is 113.04

7 0

3 years ago