Testing hypotheses about a mean

# Hypothesis testing examples mean, she thinks ahead... Hence we reject the null hypothesis and accept the alternative hypothesis. We conclude there is significant evidence in favor of Ha. The P-value is 0. We did hypothesis tests in earlier modules. But we will see that the steps and the logic of the hypothesis test are the same.

## Conduct and interpret results from a hypothesis test about a population mean.

Why should Melanie do a hypothesis test? We want the probability that the sample mean is greater than To conduct a hypothesis test, Melanie knows she has to use a t-model of the sampling distribution. Here we primary homework help christianity to assess whether the sample mean of Do we have evidence to suggest that only children have an average higher cholesterol level than the national average?

Try It. As always, hypotheses come from the research question. In this case, it is unlikely that the data came from this population. Fifteen patients are enrolled in the study and asked to take the new drug for 6 weeks. When we do not reject H0, it may be very likely that we are order of operations homework sheet a Type II error i.

### Hypothesis Test for Population Mean Example

Your assumption about the population parameter. The test statistic is a t statistic t defined by the following equation. We order of operations homework sheet the steps below. Formulate an Analysis Plan The analysis plan quantitative research thesis how to use sample data to accept or reject the null hypothesis. Example: Consider again the NCHS-reported mean total cholesterol level in for all adults of We can conclude that smokers need less sleep. Melanie decides to use one phone but randomly selects days, times, and locations in Los Angeles. The first step is to state the null hypothesis and an alternative hypothesis.

There will be variability in the sample means. This is taken to be the mean cholesterol level in patients without treatment. In the following example, a student named Melanie from Los Angeles applies what she learned in her statistics class to help her make a decision about buying a data plan for her smartphone. 