Each dot represents 1 day. How many days were recorded?
Statistical Based Inference

Quiz
•
Mathematics
•
11th Grade
•
Hard
Anthony Clark
FREE Resource
15 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
9
21
20
105
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Zoie completes a report by asking 70 students across campus. She found that 48% of CIAA students do not wash their hands after using the bathroom. What is the population of her survey?
the bathroom
CIAA students
48% of students
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Assign each car in a dealership a number and then use a random-number table to select the cars to be inspected.
systematic
random sample
convenience
biased sampling
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Which has fatter tails?
t-distribution
normal distribution
standard normal distribution
chi-square distribution
Answer explanation
(see image)
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
What is the degrees of freedom of the t-distribution if its sample size is 8?
7
6
8
9
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
True or False. The t-distribution becomes similar to the standard normal distribution as sample size becomes larger.
True
False
Answer explanation
True. As n increases, the t-distribution will approach the standard normal distribution.
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Fill in the blank. As the d.f. ______, the t-distribution approaches the standard normal distribution
increases
decreases
stays the same
Answer explanation
Increases. The t-distribution becomes similar to the standard normal distribution as sample size becomes larger.
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