If a researcher is using a t statistic to test a null hypothesis about a population, what information is needed from the population to calculate the t statistic?   Group of answer choices The researcher must know the population median. The researcher must know the population variance or standard deviation. The researcher must know the population size. The researcher does not need to know any information about the population.

Z-Test or T-Test For this assignment, you will review two different situations that both involve comparing a sample to a population. Consider the information available for each situation, choose the correct test, and use the data to conduct it. A researcher wants to compare the email use of the employees at one company to the corresponding population. Data is collected on the number of emails received by the company's employees. It will be necessary to use this sample data, as well as population data to determine if there is a significant difference between both. Population Mean number of emails: 30 Standard deviation: 4 Sample Mean number of emails: 33 Total employees: 100 A researcher wants to compare the number of vehicles owned by families in one location to the larger population. Data is collected on the number of vehicles owned by each family. It will be necessary to use this sample data, as well as population data to determine if there is a significant difference between…

Using the dotplot of % Bachelor's Degree below, determine the range, IQR, variance and standard deviation.

Which of the following best describes the idea behind a significance test?  Choose the one best answer. Group of answer choices You start by believing the null hypothesis, but then see if the data doesn't fit this. You start by believing the alternative hypothesis, but then see if the data doesn't fit this. You start by believing neither hypothesis, and see which hypothesis you data fit better with.