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Refer to the null hypothesis as a theory that has been presented because the researcher believes it to be true or would like to use it as a basis for a future argument. It is critical to understand that a null hypothesis has not been proven on any level and thus the experiment. Additional special consideration is always given to the null hypothesis over the alternative hypothesis simply because it directly relates to the statement that is being tested. On the other hand the alternative hypothesis is accepted when the null hypothesis is rejected. When the research or test is concluded the conclusion are always in relation to the null hypothesis. Simply stated you either reject or fail to reject the null hypothesis and the concept of rejecting or failing to reject the alternative hypothesis would never be used.
Could rejecting the null hypothesis actually be a positive thing in an experiment or test? Please provide and example with your thoughts. Could you think of a situation where rejecting the null hypothesis does not mean the alternative hypothesis is true.
An analysis of variance was used to evaluate the mean differences from a repeated-measures research study. The results were reported as F(3,24)=6.40.
Consider the following age data, which is the result of selecting a random sample of 20 United Airlines pilots.
What is given is the mean=27.2 kilograms and standard deviation=4.3 kilograms. I attempted to work out a which I know is wrong but this is what I did.
What is the probability that a cereal would either high calorie or high fiber? In other words, what is P(high calorie or high fiber)?
The post-anesthesia care area (recovery room) at St. Luke's Hospital in Maumee, Ohio, was recently enlarged. The hope was that with the enlargement the mean number of patients per day would be more than 25. A random sample of 15 days revealed the ..
A consumer is contemplating the purchase of a new compact disc player. A consumer magazine reports data on the major brands. Brand A has lifetime (TA) which is exponentially distributed with m=.02; and Brand B has lifetime
When computing a t-test, it is important to distinguish between directional and nondirectional hypotheses as the direction will determine the rejection regions. Describe how the rejection regions would differ according to the type of hypothesis yo..
If you were to draw a scatter plot of the number of women in the workforce versus the number of Christmas trees sold in the United States for each year between 1930 and the present
Construct a 90% confidence interval for the true mean weight. What sample size would be necessary to estimate the true weight with an error of plus or minus .03 grams with a 90% confidence?
A small pilot study is being conducted to determine the association between maternal age and birth weight. First, from all the single births in 2009 at Hospital X with mothers aged ? 20 years, we randomly selected 15 records.
The height in inches of girls on a high school girls basketball team are as follows: Identify the z score used in a quantile plot for the player with a height of 66.5 inches.
The proportion of drivers who use seat belts depends on things like age, gender, ethnicity, and local law. As part of a broader study, investigators observed a random sample of 117 female hispanic drivers in Boston
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