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Orlov [11]
3 years ago
14

Please help me!! Thank you

Mathematics
1 answer:
natima [27]3 years ago
7 0
Its going to be J hopes this helps you 
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Use the confidence interval to find the estimated margin of error. Then find the sample mean. A biologist reports a confidence i
mash [69]

Complete Question

A biologist reports a confidence interval of (3.5,4.9) when estimating the mean height (in centimeters) of a sample of seedlings. What is the estimated margin of error and the sample mean?

Answer:

The  margin of error is  E = 0.7

The  sample mean is  \=  x  =  4.2

Step-by-step explanation:

from the question we are told that

   The  upper limit is  k  =  4.9

    The  lower limit is  r = 3.5

Generally the margin of error is mathematically represented as

      E =  \frac{k - r}{ 2}

      E = \frac{ 4.9  -  3.5 }{2}

     E = 0.7

Generally the sample mean is mathematically evaluated as

        \=  x = k  -  E

=>    \= x  =  4.9 - 0.7

=>    \=  x  =  4.2

4 0
3 years ago
Can you please tell me the answer for 8m/.9/12m=
olga55 [171]
106.666667



Jccjfjfjujjdjdjd
8 0
3 years ago
The height of the average wave, in feet, over thours at Sandy Beach is modeled by the equation below.
Naddika [18.5K]

Answer:

Check below

Step-by-step explanation:

With the information given, let's consider some aspects of Sandy Beach behavior.

1. Sandy Beach

Let's calculate the period of this function

t=4sin(s)+5

T=\frac{2\pi}{b} \:b=1 \:in \:this \:case

T=\frac{2\pi}{1}  \therefore T= 2\pi

The Period of sin function is 2\pi

2. Verifying the Range, in this case the lapse of time.

A <em>sin</em> function varies from -1 to 1, i.e.

-1\leq sin(s) \leq1 \therefore-4\leq 4sin(s)\leq4 \\ adding \:the\:5\\-4+5\leq 4sin(s)\leq4+5\\\\\1\leq4sin+5\leq9 \therefore t=[1,9]\\

So, within an interval form 1 to 9 hours the waves at Sandy Beach come and go.

3. Check the graph below.

7 0
3 years ago
Read 2 more answers
Which of the following is a right scalene triangle
svp [43]

Answer:

The second one is a scalene triangle

5 0
2 years ago
Determine the area of the composite figure.
choli [55]

Answer:

Area = 142.5 square inches

Step-by-step explanation:

So your shape is kind of a little house. The bottom part is a rectangle 9 × 9.5. The area of the rectangle is

Area = length×width

= 9 × 9.5

= 85.5

The "roof" of the little house is a triangle. The area of a triangle is 1/2×base×height

Now, the base of the "roof" is the same as the floor of the house, 9.5 inches.

The height of the whole thing is 21 inches. If we take away the rectangle's wall-height, we'll get the height of the "roof".

Roof height= 21 - 9

= 12 inches

Area_roof

=1/2 × base × height

=1/2 × 9.5 × 12

= 57 square inches

Total area is bottom plus roof (the rectangle and the triangle)

Total Area

= 85.5 + 57

= 142.5 sq in

7 0
2 years ago
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