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4 years ago

What is a randomized controlled trial?

Mathematics

2 answers:

kiruha [24]4 years ago

7 0

Answer: having your control group chosen by random

Step-by-step explanation: so basically you do not plan who or what your control group and experimental group is, they are chosen at a random and lucky guess.

mr_godi [17]4 years ago

3 0

Answer:

Definition. A study design that randomly assigns participants into an experimental group or a control group. As the study is conducted, the only expected difference between the control and experimental groups in a randomized controlled trial (RCT) is the outcome variable being studied.

Step-by-step explanation:

because

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Type the expression that results from the following series of steps:

kramer

P to the power of 3. Or p x p x p. Hope this helps!

7 0

3 years ago

Which of the following statements is true about the three quadrilaterals?

KIM [24]

Answer:

Step-by-step explanation:

8 0

3 years ago

BROO HELP ME PLEASE I DONT UNDERSTAND AND IM STRESSING OUT IT WOULD MEAN ALOT THANK YOUUUU

Tema [17]

Answer: 1a. $190

b. The total cost of making 20 bracelets.

c. $350

d. The total cost of making 100 bracelets.

e. $1150

f. The total cost of making 500 bracelets.

g. 150 bracelets

h. 425 bracelets

Step-by-step explanation:

1a. C(20)=150+2(20)

C(20)=150+40

C(20)=$190

b. The total cost of making 20 bracelets.

c. C(100)=150+2(100)

C(100)=150+200

C(100)=$350

d. The total cost of making 100 bracelets.

e. C(500)=150+2(500)

C(500)=150+1000

C(500)=$1150

f. The total cost of making 500 bracelets.

g. 450=150+2b

2b=300

b=150 bracelets

h. 1000=150+2b

2b=850

b=425 bracelets

5 0

2 years ago

The following table shows the data collected from four random samples of 50 students from a small middle school regarding their

Sonbull [250]

Answer:

Answer: The reading that is preferred by the majority of students in the samples is: Novels.

Step-by-step explanation:

We are given table of data that represents the reading preferences of 50 students as:Sample# Novels Short Stories Classics ComicBooks Total 1 26 19 1 4 50 2 30 10 3 7 50 3 33 15 1 1 50 4 22 18 2 8 50Clearly from all the 4 samples we could observe that most students like: Novels.and then they love Short stories , after which they love to read Comic books and the least preferred readings is: Classics.

4 0

3 years ago

An elevator has a placard stating that the maximum capacity is 1296 lb long dash — 8 passengers. So, 8 adult male passengers ca

Masja [62]

Answer:

There is a 98.26% probability that it is overloaded.

This elevator does not appear to be safe.

Step-by-step explanation:

Problems of normally distributed samples can be solved using the z-score formula.

In a set with mean $\mu$ and standard deviation $\sigma$ , the zscore of a measure X is given by

$Z = \frac{X - \mu}{\sigma}$

After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X. Subtracting 1 by the pvalue, we This p-value is the probability that the value of the measure is greater than X.

In this problem, we have that:

Assume that weights of males are normally distributed with a mean of 170 lb, so $\mu = 170$

They have a standard deviation of standard deviation of 29 lb, so $\sigma = 29$ .

We have a sample of 8 adults, so we have to find the standard deviation of the sample to use in the place of $\sigma$ in the Z score formula.

$s = \frac{\sigma}{8} = \frac{29}{8} = 3.625$

Find the probability that it is overloaded because they have a mean weight greater than 162 lb, so $X = 162$

$Z = \frac{X - \mu}{\sigma}$

$Z = \frac{162 - 170}{3.625}$

$Z = -2.21$

$Z = -2.21$ has a pvalue 0.0174.

So, there is a 1-0.0174 = 0.9826 = 98.26% probability that it is overloaded.

Any probability that is above 95% is considerer unusually high. So, this elevator does not appear to be safe, since there is a 98.26% probability that it is overloaded.

8 0

3 years ago