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ololo11 [35]
3 years ago
15

Suppose a student received a 6, 8, 6 on their first three quizzes each worth 10 points.

Mathematics
2 answers:
9966 [12]3 years ago
5 0
Answer: 8

(6 + 8 + 6 + x) / 4 = 7
(20 + x) / 4 = 7
20 + x = 28
x = 8
IrinaK [193]3 years ago
3 0

Answer:

8

Step-by-step explanation:

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The standard normal curve shown here is a probability density curve for a continuous random variable. This means that the area u
faust18 [17]

the answer is 0.7068

6 0
3 years ago
Alyn drives 20.4 miles in 17 minutes.
Galina-37 [17]

Answer:

  • 12 mph

Step-by-step explanation:

<em>Speed = distance/time</em>

  • Distance = 20.4 miles
  • Time = 17 minutes = 17*1/60 hours = 17/60 hours

<u>Speed is:</u>

  • 20.4 : 17/60 =
  • 20.4*60/17 =
  • 72 mph

<u>Alyn exceeded the limit by:</u>

  • 72 - 60 = 12 mph
5 0
3 years ago
What is the answer to the question " 6(5x(41-36)-(8+14))
alisha [4.7K]
So  41-36=5, 5x5=25, which makes it 6(25-(8+14)). So then it's 6(25-22), which is 6x3, which is 18. (So 18 is the answer). 
5 0
3 years ago
A group of researchers are interested in the possible effects of distracting stimuli during eating, such as an increase or decre
Dmitry [639]

Using the t-distribution, it is found that since the p-value of the test is of 0.0302, which is <u>less than the standard significance level of 0.05</u>, the data provides convincing evidence that the average food intake is different for the patients in the treatment group.

At the null hypothesis, it is <u>tested if the consumption is not different</u>, that is, if the subtraction of the means is 0, hence:

H_0: \mu_1 - \mu_2 = 0

At the alternative hypothesis, it is <u>tested if the consumption is different</u>, that is, if the subtraction of the means is not 0, hence:

H_1: \mu_1 - \mu_2 \neq 0

Two groups of 22 patients, hence, the standard errors are:

s_1 = \frac{45.1}{\sqrt{22}} = 9.6154

s_2 = \frac{26.4}{\sqrt{22}} = 5.6285

The distribution of the differences is has:

\overline{x} = \mu_1 - \mu_2 = 52.1 - 27.1 = 25

s = \sqrt{s_1^2 + s_2^2} = \sqrt{9.6154^2 + 5.6285^2} = 11.14

The test statistic is given by:

t = \frac{\overline{x} - \mu}{s}

In which \mu = 0 is the value tested at the null hypothesis.

Hence:

t = \frac{25 - 0}{11.14}

t = 2.2438

The p-value of the test is found using a <u>two-tailed test</u>, as we are testing if the mean is different of a value, with <u>t = 2.2438</u> and 22 + 22 - 2 = <u>42 df.</u>

  • Using a t-distribution calculator, this p-value is of 0.0302.

Since the p-value of the test is of 0.0302, which is <u>less than the standard significance level of 0.05</u>, the data provides convincing evidence that the average food intake is different for the patients in the treatment group.

A similar problem is given at brainly.com/question/25600813

4 0
3 years ago
Henry combines 7.49 litters of red paint with 6.26 litters of red paint and pours it in to 4 container with 0.43 litters of pain
11111nata11111 [884]
To find the answer we start by adding the contents of both containers together
7.49 + 6.26 = 13.75
Since we know that there is leftover paint we are going to subtract the leftovers from the total of combined paint
13.75 - 0.43 = 13.32
The combined paint is poured into 4 containers so we divide our combined total minus the leftovers by 4
13.32/4 = 3.33
Answer: There are 3.33 liters of paint in each container
5 0
2 years ago
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