Kye

2021-02-09

Know these terms. Explain in one sentence each what “randomized,” “double-blind,” and “placebo-controlled” mean in the description of the design of the study.

Experiment basics. Identify the subjects, the explanatory variable, and several response variables for this study.

Experiment basics. Identify the subjects, the explanatory variable, and several response variables for this study.

opsadnojD

Skilled2021-02-10Added 95 answers

Step 1

The study design is the framework used to collect and analyze data.

Step 2

The randomized study design is the study in which the researcher randomly assigns the participants in the control and experimental group. Both groups receive different treatments under the same conditions.

Step 3

A double-blind study is a study in which neither the participant nor the experimenter knows which group is getting what treatment. It completely removes any bias in the study.

Step 4

A placebo is similar to real medicine in appearance, however, it has no therapeutic properties. To evaluate the effect of a drug, researchers administer a placebo to one group and the drug to another group. Such studies are called placebo-controlled studies.

The study design is the framework used to collect and analyze data.

Step 2

The randomized study design is the study in which the researcher randomly assigns the participants in the control and experimental group. Both groups receive different treatments under the same conditions.

Step 3

A double-blind study is a study in which neither the participant nor the experimenter knows which group is getting what treatment. It completely removes any bias in the study.

Step 4

A placebo is similar to real medicine in appearance, however, it has no therapeutic properties. To evaluate the effect of a drug, researchers administer a placebo to one group and the drug to another group. Such studies are called placebo-controlled studies.

Read carefully and choose only one option

A statistic is an unbiased estimator of a parameter when (a) the statistic is calculated from a random sample. (b) in a single sample, the value of the statistic is equal to the value of the parameter. (c) in many samples, the values of the statistic are very close to the value of the parameter. (d) in many samples, the values of the statistic are centered at the value of the parameter. (e) in many samples, the distribution of the statistic has a shape that is approximately NormalConstruct all random samples consisting three observations from the given data. Arrange the observations in ascending order without replacement and repetition.

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The equation has a positive slope and a negativey-intercept.

1) y=−2x−3

2) y=2−3x

3) y=2+3x

4) y=−2+3xWhat term refers to the standard deviation of the sampling distribution?

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What percent of $240$ is $30$$?$

The first 15 digits of pi are as follows: 3.14159265358979

The frequency distribution table for the digits is as follows:

$\begin{array}{|cc|}\hline DIGIT& FREQUENCY\\ 1& 2\\ 2& 1\\ 3& 2\\ 4& 1\\ 5& 3\\ 6& 1\\ 7& 1\\ 8& 1\\ 9& 3\\ \hline\end{array}$

Which two digits appear for 3 times each?

A) 1, 7

B) 2, 6

C) 5, 9<br<D) 3, 8How to write

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What number is 12% of 45?

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Leasing a car. The price of the car is$45,000. You have $3000 for a down payment. The term of the lease is and the interest rate is 3.5% APR. The buyout on the lease is51% of its purchase price and it is due at the end of the term. What are the monthly lease payments (before tax)?

The mean of sample A is significantly different than the mean of sample B. Sample A: $59,33,74,62,87,73$ Sample B: $53,67,72,57,93,79$ Use a two-tailed $t$-test of independent samples for the above hypothesis and data. What is the $p$-value?

What is mean and its advantages?