MA116 Midterm 1 Exam 2025 Questions and Answers

MA116 Midterm 1 Exam 2025 Questions
and Answers


Skewed right-

1. Long ____ tail

2. Mean and median relationship

3. Box and whiskers plot - where is the median? - --CORRECT ANSWER--1.

Right

2. Mean>Median

3. Toward right of box

Skewed left-

1. Long ____ tail

2. Mean and median relationship

3. Box and whiskers plot - where is the median? - --CORRECT ANSWER--1. Left

2. Mean<Median

3. Toward left of box



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, Independence rules (3) - --CORRECT ANSWER--1. P(A∩B) = P(A) * P(B)

2. P (A∩B/B) = P(A)

3. P (A∩B/A) = P(B)

True or false- Disjoint events are independent - --CORRECT ANSWER--FALSE-

not always independent

Permutations rule- does order matter? replacement? - --CORRECT ANSWER--

Yes. Yes.

Permutations and combinations rule:

- N=

- n= - --CORRECT ANSWER---N= Total elements

-n= # in group

Permutations formula - --CORRECT ANSWER--(N!) / (N-n)!

Combinations rule- does order matter? replacement? - --CORRECT ANSWER--

No. No

Combinations formula - --CORRECT ANSWER--(N!) / n! (N-n)!

Random variables (Mean, Standard Deviation) - --CORRECT ANSWER--(sample

mean, σ/√n)

PDF- total area under curve= - --CORRECT ANSWER--1



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