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Straighterline Mathematics
MATH 250 Straighterline Math Exam

Course Title and Number: MATH 250 Straighterline
Math Exam
Exam Title: MATH 250 Straighterline Math Exam
Exam Date: Exam 2024- 2025
Instructor: [Insert Instructor’s Name]
Student Name: [Insert Student’s Name]
Student ID: [Insert Student ID]

Examination
180 minutes
Instructions:
1. Read each question carefully.
2. Answer all questions.
3. Use the provided answer sheet to mark your responses.
4. Ensure all answers are final before submitting the exam.
5. Please answer each question below and click Submit when you
have completed the Exam.
6. This test has a time limit, The test will save and submit
automatically when the time expires
7. This is Exam which will assess your knowledge on the course
Learning Resources.

Good Luck!
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, Straighterline Mathematics 2024-2025 Straighterline
Math StraighterLine Business Statistics MAT202 Final
Exam Review with Verified Solutions | 100% Pass
Guaranteed | Graded A+ |

Read All Instructions Carefully and Answer All the
Questions Correctly Good Luck: -

The population variation has little or no effect in
determining the size of a sample selected from the
population. - Answer>> False

When using the t distribution to calculate a confidence
interval, we assume that the population of interest is
normal or nearly normal. - Answer>> True

A p-value is the same as a stated significance level. -
Answer>> False

If the null hypothesis is µµ ≥ 200, then a two-tail test is
being conducted. - Answer>> False

A test statistic is a value computed from sample
information that is used to test the null hypothesis. -
Answer>> True

If the null hypothesis is false and the researchers do
not reject it, a Type I error has been made. - Answer>>
False

Assuming that the null hypothesis is true, a p-value is
the probability of observing a sample value greater

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,than and/or less than an observed sample observation.
- Answer>> True

If two dependent samples of size 20 are used to test
the difference between the means, the degrees of
freedom for a t-statistic are 19. - Answer>> True

If we are testing for the difference between two
population means and assume that the two populations
have equal and unknown standard deviations, the
degrees of freedom are computed as (n1)(n2) - 1. -
Answer>> False

If we are testing for the difference between two
population means, it is assumed that the sample
observations from one population are independent of
the sample observations from the other population. -
Answer>> True

If the null hypothesis states that there is no difference
between the mean income of males and the mean
income of females, then the test is one-tailed. -
Answer>> False

A statistics professor wants to compare grades in two
different classes of the same course. This is an example
of a paired sample. - Answer>> False

To employ ANOVA, the populations being studied must
be approximately normally distributed. - Answer>> True

The students in a class are given an exam with a
maximum score of 100. Their numerical scores are an
example of what type of data?

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(since a the score is given we know it is not nominal, it
is not in order so it is not ordinal nor is it written in
interval form)

These exam scores are an example of ratio data
because there is a meaningful zero point for these data,
and because the ratio of two scores is meaningful. That
is, a score of zero on the exam would mean that no
questions were answered correctly, and a score of 90
on the exam would be 50% better than a score of 60.

What is the mode of the values in the table?

80 55 60 80 75 100 60 55 80 70 95 90 - Answer>> Ans:
80
The mode is 80 because it is the most frequently-
occurring value in the table.

Which situation involves two statistically independent
events? - Answer>> Ans: fair dice thrown at the same
time

How many different combinations of 2 students can be
chosen from a class of 25, where the order of selection
does not matter? - Answer>> Using the combination
formula,

n!/r!(n-r)!

A researcher performs a two-tailed test of the
hypothesis that a sample mean is greater than zero at

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