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Cloud [144]
3 years ago
14

Find a 90% confidence interval for the population standard deviation for the weights of men if a sample of 14 randomly selected

men have a sample mean of 156.9 pounds and a sample standard deviation of 11.1 pounds. Assume that the population has a normal distribution.
Mathematics
1 answer:
kenny6666 [7]3 years ago
5 0

Who do you think got the better deal in the Compromise of 1850, the North or the South? Why?

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Can someone help me with number five ???
exis [7]
Hey there! This is gonna actually be surprisingly simple even though it looks confusing!

Since the scale is perfectly balanced (it's completely flat because the weights are equal) you can use an = sign.

There are 3 cubes which weigh 9 ounces so 3 times 9 is 27 so on the left side you can put down a 27. Then there are 7 circles so so 7x can represent this. So that belongs on the left side as well SO for the left sides we can write this
27 + 7x = _______

Now for the right side. There are 5 cubes so 5 times 9 ounces is 45 so that belongs on the left. And then there is one cube so we can just right x. SO for the right side (combined with the other parts we know looks like this.
27 + 7x = 45 + x

NOW for the solving!
<span>27 + 7x = 45 + x
</span>subtract x from both sides
27 + 6x = 45
subtract 27 from both sides
6x = 18
then divide 6 from both sides
x = 3

So the circles are 3 ounces!!!!

I hope that helps! And feel free to ask me any questions!!

- mathwizzard3
5 0
3 years ago
Help me with this!! I dont understand this question
Sonja [21]

Answer:

the answer would be c

Step-by-step explanation: Because the values inside of the parenthesis don't have the same variable, they cannot be combined. Using the 9 on the outside of the parenthesis you would multiply 9 by 3r, which gives you 27r, and 9 by -4 to create -36. The new equation would be 27r - 36, which is equivalent to the equation shown next to it.

4 0
3 years ago
5.
adelina 88 [10]

Answer:

IHG= scalene

HJI= isosceles

KHI= scalene

HJK= equilateral

4 0
2 years ago
Look at the graph below measuring the speed of a truck and answers the following 2 question.
NemiM [27]
X would be equal to time and y be equal to distance

The y axis would be measuring distance and the x axis would be measuring time. Another name for a speed graph is the distance time graph. The y axis would be measuring the distance covered by the truck in meters and the x axis would be for the time it takes to reach that distance in second.



B) 2-6 would represent contact motion, meaning the vehicle is at rest. The time would be increasing from 2-6 to however the distance remains the same which is 20m
4 0
2 years ago
Please answer this it’s not answered on brainly yet
Tema [17]

Answer:

125.92 sq cm

Step-by-step explanation:

You need to find the area of all the sides, so:

2(2.2 * 9.1) + 2(2.2 * 3.8) + 2( 9.1 * 3.8)

= 125.92 sq cm

4 0
3 years ago
Read 2 more answers
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