bionmysocial.blogg.se - Simple geography tests

H 0: μ = 310 (population mean is equal to 310 pounds).

We will perform the one sample t-test with the following hypotheses: Suppose we collect a random sample of turtles with the following information: To test this, will perform a one-sample t-test at significance level α = 0.05 using the following steps: Suppose we want to know whether or not the mean weight of a certain species of turtle is equal to 310 pounds. You can check this assumption by creating a boxplot and visually checking for outliers.

The variable under study should have no outliers.

You can check this assumption by creating a histogram and visually checking if the distribution has roughly a “bell shape.”

The variable under study should be approximately normally distributed.

The observations in the sample should be independent.

The variable under study should be either an interval or ratio variable.

One Sample t-test: Assumptionsįor the results of a one sample t-test to be valid, the following assumptions should be met: If the p-value that corresponds to the test statistic t with (n-1) degrees of freedom is less than your chosen significance level (common choices are 0.10, 0.05, and 0.01) then you can reject the null hypothesis. We use the following formula to calculate the test statistic t:

H 1 (left-tailed): μ μ 0 (population mean is greater than some hypothesized value μ 0).

H 1 (two-tailed): μ ≠ μ 0 (population mean is not equal to some hypothesized value μ 0).The alternative hypothesis can be either two-tailed, left-tailed, or right-tailed: H 0: μ = μ 0 (population mean is equal to some hypothesized value μ 0).One Sample t-test: FormulaĪ one-sample t-test always uses the following null hypothesis: Fortunately, a one sample t-test allows us to answer this question. The question is whether or not this difference is statistically significant. However, it’s virtually guaranteed that the mean weight of turtles in our sample will differ from 310 pounds.

Instead, we might take a simple random sample of 40 turtles and use the mean weight of the turtles in this sample to estimate the true population mean: Since there are thousands of turtles in Florida, it would be extremely time-consuming and costly to go around and weigh each individual turtle. Suppose we want to know whether or not the mean weight of a certain species of turtle in Florida is equal to 310 pounds. An example of how to perform a one sample t-test.The assumptions that should be met to perform a one sample t-test.The formula to perform a one sample t-test.The motivation for performing a one sample t-test.True or False: Holland is a region in The Netherlands?Ģ0.A one sample t-test is used to test whether or not the mean of a population is equal to some value. What is the smallest US state by area?ġ9. On what continent would you find the world’s largest desert?ġ7. What is the state capital of New York?ġ5. Where is Angel Falls, the world’s largest waterfall, located?ġ4. Which river flows through the Grand Canyon?ġ3. What is the only continent with land in all four hemispheres?ġ2. Which of these languages is the most spoken (native speakers only)?ġ1. Canberra is the capital city of what country?ġ0. What US state is the most sparsely populated?Ĩ. How many tectonic plates does the Earth have?ħ. Which of these countries is the most densely populated?Ħ. Which of these countries is NOT in Africa?ĥ. What country has the longest total coastline (including mainland and offshore islands)?Ĥ.

What is thought to be the world’s oldest volcano?ģ. Which of these is defined as ‘a piece of land that is almost entirely surrounded by water but is connected to the mainland on one side’?Ģ. If you’re in need of even more Geography quiz questions then have no fear we have you covered! Use these in a pop quiz, exam or even better - make them part of your next Menti presentation and make them interactive.