How many edges does the figure have?

A dietitian wants to know the average time spent on breakfast in a primary school. The dietitian randomly samples 25 students an

blsea [12.9K]

Answer:

The right options are:

a. The margin of error is 0.632

f. There is a 95% chance that the true mean is between 11.968 and 13.232 minutes.

Step-by-step explanation:

The question is incomplete:

Select one or more:

a. The margin of error is 0.632

b. The margin of error is 1264.

C. The margin of error is 0.600.

d. We believe that the true mean time spent on breakfast is between 11.968 and 13.232 minutes.

e. If we take many other samples from this population, 95% of them will have a sample mean that is between 11968 and 13232.

f. There is a 95% chance that the true mean is between 11.968 and 13.232 minutes.

The margin of error can be calculated from the bounds of the confidence interval as:

$E=\dfrac{UL-LL}{2}=\dfrac{13.232-11.968}{2}=\dfrac{1.264}{2}=0.632$

As the confidence interval is calculated at 95% confidence, we are 95% confident that the true mean is within the calculated interval. We are not 100% confident although (that's why Option d is false).

This interval does not give us information about the sampling distribution (option e is false).

8 0

3 years ago

Someone please help me on number 3 and if the others are wrong please let me know ITS MULTI STEP EQUATION COMBINING LIKE TERMS

weeeeeb [17]

Answer:

#1: x = 3; #2 c = 1/2; #3 = x = 22; #4 is correct (x = -8)

Step-by-step explanation:

for the first equation everything was right until 22x = 66

after

22x = 66

you must divide everything by 22

x = 3

that is for #1

for the second equation you copied down the question wrong

the negative is still there

6c - 8 - 2c = -6

combine 6c and -2c

4c - 8 = -6

the negative remains on the 8

add 8 to both sides

4c = 2

divide 4 to both sides

c = 2/4 or just 1/2

for the third equation you must first combine like terms

-3x + 25 + x + 21 = 2

combine -3x and x & 25 and 21

-3x + x = -2x

25 + 21 = 46

-2x + 46 = 2

then subtract 46 from both sides

-2x = -44

now divide both sides by -2

x = 22

that is your answer

number four should be correct

3 0

2 years ago

How many km is 525 meter

shusha [124]

Hello,

The answer is 0.525 km

Remember, there are 1000 m in a kilometer.

Thanks for using brainly :)

3 0

4 years ago

In the brown home, there are 30 total legs on people and pets. Each dog has 4 legs, and each family member has 2 legs. The numbe

statuscvo [17]

There are 5 dogs 5 people

6 0

3 years ago

How many license plates can be made which have the form ##LLL (2 numbers followed by 3 letters with repetition allowed) ?

Elden [556K]

Number of wars two numbers can be formed with repetition allowed = 10^2 = 100 ways.
Number of ways 3 letters can be formed with repetition allowed = 26^3 = 17,567

Therefore, Number of license plates that can be made with 2 numbers followed by 3 letters with repitition allowed = 100 x 17,567 = 1,757,600

option a is the correct answer.

7 0

3 years ago