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zhuklara [117]
2 years ago
7

One hundred tomato plants were randomly selected from a large garden, and a 90% confidence interval was computed to determine th

e true proportion of plants that produce useable tomatoes. The interval is 0.86 to 0.92.
What can be done to decrease the margin of error? Check all that apply.
Increase the sample size.
Increase the confidence level.
Select another sample.
Decrease the sample size.
Decrease the confidence level.
Select many samples of the same size and calculate the intervals.
ITS A & E
Mathematics
1 answer:
matrenka [14]2 years ago
3 0

Answer:

its

A : Increase the sample size.

E : Decrease the confidence level.

Step-by-step explanation:

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Given the following winning percentages of the teams in a league (for a single year) compute the within-season standard deviatio
Masja [62]

Answer:

(b) 0.251

Step-by-step explanation:

1. Standard deviation equation:

SD=\sqrt{\frac{\sum\limits^N_i {(x_{i}-X)^{2}  } }{N} }

Where X is the mean of the data, and N the amount of data. Then, N=5

2. Estimate the Mean:

X=\frac{0.750+0.750+0.200+0.600+0.200}{5}=\frac{2.5}{5}=0.5\\

3. Caclulate Standard deviation:

SD=\sqrt{\frac{{(0.750-0.500)^{2}+(0.750-0.500)^{2}+(0.200-0.500)^{2}+(0.600-0.500)^{2}+(0.200-0.500)^{2}  } }{5} }

SD=\sqrt{\frac{0.315}{5} }=\sqrt{0.063}\\SD=0.251

7 0
3 years ago
Find the length of the hypotenuse of a triangle if one of its legs is 11 cm long and its perimeter is 132 cm.
rodikova [14]

Answer:

1.)

132 cm - 11 cm = 121 cm

So let the hypotenuse be x and the other leg be (121 - x).

11^2 + (121 - x)^2 = x^2

121 + 121^2 - 121(2)x = 0

x = 1/2 + 121/2 = 61 cm

Step-by-step explanation: not sure if this is right or not

7 0
3 years ago
Ally works in a shop for 18$ per hour. She is not allowed to work more than 40 hours a week but has to work atleast 20 hours. St
AleksAgata [21]

Answer:

Hi there!

The domain is:

20<=x<=40

Step-by-step explanation:

This states that:

x>=20

x<=40

Which fits the problem!

Hope this helps

8 0
3 years ago
If it takes B hours to walk a certain distance at the rate of 3 miles per hour, the number of hours it takes to return the same
natita [175]

Answer:

It will take 0.75B hours for the return leg

Step-by-step explanation:

Here, given that the first leg of the trip was for B hours at 3 miles per hour , we want to calculate the number of hours the return leg will take at 4 miles per hour given that it is the same distance.

Mathematically, we know that ;

Distance = speed * time

So the distance taken on the first leg of the trip would be;

Distance = 3 miles per hour * B hours = 3B miles

Now, this distance was traveled on the return leg also.

This means that the time taken here will be;

Time on return leg = distance/speed = 3B/4 = 0.75B hours

5 0
3 years ago
The scarf that Anita is knitting is 12/1-4 inches long. The scarf that Jeff is knitting is 4 times as long. How long is Jeff’s s
Lisa [10]
If you meant 12 1/4 inches long then your 4 feet and 1 inch long or 49 inches.
3 0
3 years ago
Read 2 more answers
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