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leonid [27]
3 years ago
7

zoey made 6 3/4 cups of fruit salad for a picnic they ate 1/3 of the fruit salad for a picnic they ate 1/3 of the fruit salad Ho

w much fruit salad did they ate?
Mathematics
1 answer:
liberstina [14]3 years ago
3 0
They ate 2 3/4 cups?
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Fifty randomly selected individuals were timed completing a tax form. The samplemean was 23.6 minutes; the sample standard devia
loris [4]

Answer:

The 99% confidence interval for the mean time required by all individuals to compete the form is between 17.168 minutes and 30.032 minutes.

Step-by-step explanation:

The first step to solve this problem is finding how many degrees of freedom, we have. This is the sample size subtracted by 1. So

df = 50 - 1 = 49

Now, we have to find a value of T, which is found looking at the t table, with 49 degrees of freedom(y-axis) and a confidence level of 0.99(t_{99}). So we have T = 2.68

The margin of error is:

M = T*s = 2.68*2.4 = 6.432.

In which s is the standard deviation of teh sample. So

The lower end of the interval is the sample mean subtracted by M. So it is 23.6 - 6.432 = 17.168 minutes

The upper end of the interval is the sample mean added to M. So it is 23.6 + 6.432 = 30.032 minutes

The 99% confidence interval for the mean time required by all individuals to compete the form is between 17.168 minutes and 30.032 minutes.

5 0
3 years ago
Diana's house has a rectangular window on the door with a height of 1.5 feet and a width of 0.8 feet. What is the area of the wi
Travka [436]
The area of the window would be 1.2 feet.
6 0
3 years ago
Read 2 more answers
When Lin drives a golf ball, it travels a mean distance of 200 yards with a standard deviation of 20 yards, and the distribution
Anettt [7]

Answer:

The percentage of her shots that will travel less than 180 yards is approximately 15.9%

Step-by-step explanation:

First it will be required to find the standard or z-score from the following formula

z = \frac{x- \mu}{\sigma}

Where:

z = z or standard score

x = value that is observed = 180 yards

μ = Sample mean = 200 yards

σ = Sample standard deviation yards

Plugging the values, we have;

z = \frac{180- 200}{20} = -1

Therefore, the probability that her shots will travel less than 180 is given by the relation;

p( x < 180 yards) = p(z < -1) = 0.15866

Therefore, the percentage of her shots that will travel less than 180 = 0.15866 × 100

= 15.866% ≈ 15.9%.

3 0
3 years ago
Pleasee help!!
kiruha [24]

Answer:

Yes the stand would make a profit, a $25 profit to be exact.

Step-by-step explanation:

the equation is 3n>100+0.50n

if the stand sells 50 then n=50 making it 3(50)>100+0.50(50).

by doing the multiplication then adding you'll get 150>125 since 3×50 is 150 ans 0.50×50 is 25 and you add the 25 to 100.

which means it'll gain $150 and spend $125 on maintaining the stand and for supplies with a $25 left over. It would make a profit

7 0
3 years ago
Brake down mental math 9378-2536
Lera25 [3.4K]

Answer:6842

Step-by-step explanation: 9378-2536=6842

4 0
3 years ago
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