## Why Does Increasing The Number Of Trials Increase Confidence In The Results Of The Experiment??

Why does increasing the number of trials increase confidence in the results of the experiment? Sample Response: Increasing the number of **trials reduces the impact of any one imprecise measurement**. Using an average value for data points provides a better representation of the true value.

## Why does increasing the number of trials increase confidence in the results?

Increasing the number of trials **reduces the impact of any one imprecise measurement**. … To increase the number of attempts you can find an average result for the experiment as well as find and discrepancies as human error if you perform an experiment several times.

## Which best describes the data the table shows results of an experiment?

The table shows results of an experiment that was replicated. Which best describes the data? **They are neither precise nor reproducible.** … They are accurate and reproducible.

## Why does increasing the number of trials increase confidence in the results of the experiment quizlet?

Why does increasing the number of trials increase confidence in the results of the experiment? Sample Response: Increasing the number of **trials reduces the impact of any one imprecise measurement**. Using an average value for data points provides a better representation of the true value.

## Why do we increase the number of trials?

Repeated trials are where you **measure the same thing multiple times to make your data more reliable**. This is necessary because in the real world data tends to vary and nothing is perfect. The more trials you take the closer your average will get to the true value.

## What is a main reason why the scientific model of atoms?

The main reason why the scientific model of atoms is considered a theory rather than a law is **because it predicts but does not explain**.

## What are two main purposes for using repetition when conducting experiments quizlet?

What are two main purposes for using repetition when conducting experiments? **Reducing mistakes and increasing confidence in results**.

## When an experiment is replicated How should the results of the two experiments compare?

Answer: : The **results of the experiments should be similar**. The comparison is that the results of the second experiment should be similar to the results of the first experiment. This should be the case because if we do two similar experiments we should observe similar results as well.

## How does the standard deviation of the population affect the width of the confidence interval for the population mean quizlet?

**Larger values of the population standard deviation result in wider intervals**.

## What is the formula for the single sample t statistic quizlet?

Terms in this set (31)

The correct formula for effect size using Cohen’s d for a single-sample t test is: **d = (M – μ)/s.**

## Which of the following is the best description of a randomized experiment?

which of the following is the best description of a randomized experiment? **an experiment in which the treatments are assigned randomly to experimental units.**

## How does the number of trials affect the results?

The number of trials obtained from a subject in an experiment **influences the stability (test-retest reli-ability) and thus validity of the data**. One trial might not be representative of a subject’s more general performance.

## What happens as the number of trials increases?

As the number of trials keeps increasing **the experimental probability tends towards the theoretical probability**. To see this the number trials should be sufficiently large in number.

## Why do we do more than one trial for each configuration of the equipment?

**The more samples presented at each test the better chance the scientist has of coming to a solid conclusion with little room for error**.

## What effect if any does the development of a new areas of science and technology have on theories?

What effect if any does the development of new areas of science and technology have on theories? **Theories may be proven to be true and become hypotheses.**

## Under what condition will the results of an experiment based on a hypothesis most likely lead to new experimentation?

Under what condition will the results of an experiment based on a hypothesis most likely lead to new experimentation? **When the results do not match the experimenter’s predictions**.

## Why would the CPSC perform studies?

The U.S. Consumer Product Safety Commission (CPSC) is also performing studies to build more safety into these products. … Studies performed by the CPSC **give reliability to the results of improved safety obtained by each soap company**.

## Which describes the best approach when conducting a scientific experiment?

A scientist conducted one trial of an experiment and got unexpected results. … Which describes the best approach when conducting a scientific experiment? **conduct repeated trials and make sure the experiment can be replicated**. What does it mean if an experiment exhibits reproducibility?

## Which model is most likely used to predict a future event quizlet?

**Computer models and simulations** are very useful in predicting future events. These models are used every day by weather forecasters. Computer simulations are one of the most important models that scientists use. They are important because they allow scientists to predict unknowns.

## Which two characteristics of data always occur together?

The correct answer to the question “Which two characteristics of Data always occur together” is option (d). **High accuracy and good validity**. If a measurement is validated that means it’s accurate.

## What is the importance of doing multiple trials and replicates in any experiment?

When we do experiments it’s a good idea to do multiple trials that is **do the same experiment lots of times**. When we do multiple trials of the same experiment we can make sure that our results are consistent and not altered by random events.

## What is the purpose of replicates in an experiment?

Replicates can be used **to measure variation in the experiment** so that statistical tests can be applied to evaluate differences. Averaging across replicates increases the precision of gene expression measurements and allows smaller changes to be detected.

## Why is replication important in an experiment?

In statistics replication is repetition of an experiment or observation in the same or similar conditions. Replication is important **because it adds information about the reliability of the conclusions or estimates to be drawn from the data**.

## What is the effect of increasing the level of confidence on the width of the interval quizlet?

Level of confidence and precision are inversely related. As one increases the other decreases. What effect does increasing the size of a sample have on the width of the confidence interval and the precision of the estimate? **Decreases the width of the interval** and therefore increases the precision of the estimate.

## What is the effect of increasing the level of confidence on the width of the interval increasing the confidence level makes the interval ▼ choose one?

As the level of confidence increased from 95% to 99% the width of the interval increased. As the **probability (area under the normal curve)** increased the critical value increased resulting in a wider interval.

## How does an increase in the level of confidence affect the width of the confidence interval?

Increasing the confidence will **increase the margin of error resulting in a wider interval**. Increasing the confidence will decrease the margin of error resulting in a narrower interval.

## What happens to the T distribution as the sample size increases?

**the sample more closely approximates the population**. Therefore we can be more confident in our estimate of the standard error because it more closely approximates the true population standard error.

## When calculating the confidence interval for a single-sample t-test the interval is centered around quizlet?

For the single-sample t test the confidence interval is centered around the: **mean of the sample**. The critical cutoffs for a two-tailed paired-samples t test with seven participants at a p level of 0.01 are: -3.708 and 3.708.

## What are the assumptions of the single-sample t-test quizlet?

One underlying assumption of the one-sample t-test is **that the sample is independently and randomly selected from the population of interest**. The other underlying assumption is that the scores on the variable of interest are normally distributed in the population.

## Which branch of statistics relies on probability theory?

**Inferential statistics** is based on probability theory.

## Which statement best describes a confounding variable?

Which of the following best describes a confounding variable? **A variable that affects the outcome being measured as well as or instead of the independent variable**.

## Is the science of conducting studies to collect organize summarize analyze and draw conclusions from data?

**Statistics** is the science of conducting studies to collect organize summarize analyze and draw conclusions from data.

## How does increasing trials increase accuracy?

Repeated trials are **where you measure the same thing multiple times to make your data more reliable**. This is necessary because in the real world data tends to vary and nothing is perfect. The more trials you take the closer your average will get to the true value.

## Would it be better to always increase the number of trials?

Lesson Summary

The more trials you take the closer your average will get to the true value. Three trials is usually considered to be a bare minimum five is common but the **more you can realistically** do the better.

## 3 tips to boost your confidence – TED-Ed

## Comparison of Experimental Life Test Results Taking Confidence Intervals into Account

## Statistical Power Clearly Explained!!!

## Khoảng tin cậy (confidence interval) | Learn to do SCIENCE