ISDS- Progress check
If one wants to test whether a 12 oz can of Pepsi and a 12 oz can of Coke contain the same amount of soda on average, which of the following would be the best test to conduct? a. independent samples t-test b. chi-square test of independence c. chi-square goodness of fit test d. paired samples t-test
a
In a normal distribution, the center of the the curve is which of the following? Select all that apply. Select one or more: a. Mean b. Median c. Mode d. Origin e. Range
a. Mean b. Median c. Mode
Assume that a marketer wants to test whether customers have a preference among Snickers, Twix, and Milky Way chocolate bars, and asks 100 people which one they like the most. This researcher is planning to run a(n) a. independent samples t-test b. chi-square goodness of fit test c. paired samples t-test d. chi-square test of independence Clear my choice
b
Assume that the test above was conducted at the alpha level of 0.05, and it led to a p-value of 0.03. Which of the following can be said about the results? a. Customers do not seem to have a preference among the three brands of chocolate bars. b. Customers seem to have a preference among the three brands of chocolate bars.
b
In statistical inference, _____ are used to make decisions about _____. a. sample parameters / population statistics b. sample statistics / population parameters c. population parameters / sample statistics d. population statistics / sample parameters
b
Which of the following distributions does not use degrees of freedom? a. chi-square distribution b. t distribution c. F distribution d. z distribution
d
Which of the following is an example of a discrete random variable? a. The weight of a bag of flour b. The number of students in a classroom c. The height of an oak tree d. The duration of a drive between Shreveport and Bossier City
not D
A type 1 error occurs when the null hypothesis is rejected when it is true and the probability of a Type I error is denoted by α (alpha) which is selected by the researcher. Select one: True False
t
