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marin [14]
3 years ago
9

After constructing a confidence interval estimate for a population mean, you believe that the interval is useless because it is

too wide. In order to correct this problem, you need to:_______.a. increase the population standard deviation b. increase the level of confidence c. increase the sample size d. increase the sample mean e, none of these would help
Mathematics
1 answer:
IceJOKER [234]3 years ago
8 0

Answer: C. Increase the sample size

Step-by-step explanation: The confidence interval is a interval estimate of two numbers. From the question, the width confidence interval

Can be modified into a more narrow margin by reducing the standard error. The standard error is the value obtained from the division of standard deviation and the square root of sample size. Hence, a decrease in the standard error will give a more narrow confidence interval estimate. The standard error can be reduced by increasing the denominator of the standard error formula which is the sample size.

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Answer with explanation.please.
Free_Kalibri [48]

The radius of the base is 10 cm.

Solution:

Height of a cone = 15 cm

Volume of the cone = 1570 cm³

To find the radius of the base of the cone:

Volume of the cone = \frac{1}{3}\pi r^2 h

$\Rightarrow \frac{1}{3}\pi r^2 h=1570

$\Rightarrow \frac{1}{3}\times\ 3.14\times r^2 \times 15=1570

$\Rightarrow\ 3.14\times r^2 \times 5=1570

$\Rightarrow\ 15.7\times r^2 =1570

Divide by 15.7 on both side of the equation, we get

$\Rightarrow r^2 =100

Taking square root on both sides of the equation, we get

⇒ r = 10

Hence the radius of the base is 10 cm.

5 0
4 years ago
Describe the lines or line segment.
tia_tia [17]
The answer is c. skew
4 0
3 years ago
Read 2 more answers
The first term of a geometric sequence is 3 and the multiplier, or ratio, is 2. what is the sum of the first 6 terms of the sequ
storchak [24]
Answer:

288

Explanation:

As first term in sequence is 3 so multiplying it by common ratio 5 we get 15, then multiplying 15 by 5 we get 45 and so on the sequence is
<span>3,15,45,225</span>
whose sum is 288

5 0
3 years ago
Evaluate the surface integral. S xz ds, s is the part of the plane 2x 2y z = 4 that lies in the first octant
maksim [4K]

The value of the given surface integral is 4.

The given plane intercepts the coordinate axes at (2, 0, 0), (0, 2, 0), and (4, 0, 0). These point are the coordinates of a triangular region that we can parameterize using.

S(u,v)=(1-u)((1-u)(2,0,0)+u(0,2,0)+u(4,0,0)\\S(u,v)=(2(1-u)(1-v),2u(1-v),4v)

<h3>What is the surface integral?</h3>

A surface integral is a generalization of multiple integrals to integration over surfaces. It can be thought of as the double integral analog of the line integral. Given a surface, one may integrate a scalar field over the surface or a vector field.

with 0≤u≤1 and  0≤v≤1. Then the surface element ds  is equivalent to

ds=\||\:\left(s_u\times \:\:S_v\right)||dudv=12\left(1-v\right)dudv

The surface integral is then

\int \:\int \:_Sxzds=12\int _0^1\:\int _0^1\:\left(2\left(1-u\right)\left(1-v\right),2u\left(1-v\right),4v\right)dvdu=4

Therefore the value of the given surface integral is 4.

To learn more about the integral visit:

brainly.com/question/14295614

#SPJ2

6 0
2 years ago
write the equation of the line in standard form that passes through the origin and is parallel to x + y equals 6​
horsena [70]

Answer: x+y=0

Step-by-step explanation:

The equation of the line slope-intercept form is:

y=mx+b

Where m is the slope and b is the y-interecept.

The standard form is:

Ax+By=C

You know that must be parallel to x+y=6, therefore both have the same slope. So you must solve for y:

y=-x+6

Substitute the slope m=-1. Since the line passes through the origin b=0:

 y=-x

Then in standar form is:

x+y=0

5 0
4 years ago
Read 2 more answers
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