When do we use Chi2 Test, i.e. what statistic does it involve?

a sample of employees is selected and it is found that 45% own a computer which is it a statistic or a parameter

Do wearable devices that monitor diet and physical activity help people lose weight? Researchers had 237 subjects, already involved in a program of diet and exercise, use wearable technology for 24 months. They measured their weight (in kilograms) before using the technology and 24 months after using the technology. (a) Explain why the proper procedure to compare the mean weight before using the wearable technology and 24 months after using the wearable technology is a matched pairs t test. Choose the correct explanation. A person's weight before and after wearing the device would not be independent; thus, the data from this before and after study should be analyzed using a matched pairs t test. O A person's weight before and after wearing the device would be independent; thus, the data from this before and after study should be analyzed using a matched pairs t test. O A person's weight before and after wearing the device would be independent; thus, the data from this before and after…

To investigate if female executives in a very large fortune 500 company are experiencing pay-discrimination: A researcher samples the incomes of 300 male and 300 female executives from that corporation. 1.) Which statistic would you use to test the income difference between male and female executives? 2.) What additional information do you need to calculate this statistic?

Out of the attacks that took place in 2018, was the mean number of fatalities greater in bombing/explosion attack types than in all other attack types?   i need to come up with a correct statistical test to test this research based on the data that i gathered i have this.  i gathered a sample of 80 ATTACKS.  33 of the attacks were sucessful attacks using BOMBINGS/EXPLOSIONS 35 of them were sucessful attackd by all other types of attacks need a way to use a statistical research method

Determine the test statistic x2 and the pvalue

The mechanics of a paired tt-test are very similar to a Student's tt-test.

Since the chi-square does not indicate the strength of the association, a researcher must then conduct a separate test for the measure of association.  True False