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STA 2381- Statistics Exam | Questions with Correct Verified Answers

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12 pages

Written in 2024/2025

Grade A+

KenAli

STA 2381 Exam 2024|Questions with Correct Verified Answers

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5 pages

Written in 2024/2025

Grade A+

KenAli

Sta 2381 Exam I 2026/2027 | Statistics Study Guide, Practice Questions And Answers

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6 pages

Written in 2026/2027

Grade A+

7Eleven

STA 2381 Exam |Questions with Correct Verified Answers

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7 pages

Written in 2024/2025

Grade A+

KenAli

STA 2381 Cumulative Exam |Questions with Correct Verified Answers

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35 pages

Written in 2024/2025

Grade A+

KenAli

STA 2381 Patrick Statistics Test 1 Discussion Questions - with Correct Verified Answers

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10 pages

Written in 2024/2025

Grade A+

KenAli

STA 2381- Probability and Statistics Exam | Questions with Correct Verified Answers

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6 pages

Written in 2024/2025

Grade A+

KenAli

If we find that the differences between the sample mean is a rare event, we will conclude that - correct answer The null hypothesis is rejected For a study that contains 2 groups with a total of 18 participants, how many degrees of freedom are there for a dependent means t-test? - correct answer 17 (subtract 1 from the number) T or F- If the standard error of the difference between two samples is ...

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2 pages

Written in 2023/2024

Grade A+

RealGrades

mean for discrete random variables - correct answer ∑xP(x) variance for discrete random variables - correct answer ∑(x-µ)²P(x) exact probability for binomial distribution - correct answer ((n!)/((n-x)!x!))*p^x*q^(x-n) mean for binomial distribution - correct answer np variance for binomial dis...

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2 pages

Written in 2023/2024

Grade A+

RealGrades

Descriptive Statistics - correct answer used to organize, summarize, and describe data in a meaningful way. Ex: average salaries Inferential Statistics - correct answer Uses small subset (sample) data to make predictions/inferences about the real world (population). Ex: Pharmaceutical/drug studies Simple Random Sampling - correct answer Every ...

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6 pages

Written in 2023/2024

Grade A+

RealGrades

DMAIC - correct answer Define, Measure, Analyze, Improve, Control sort, set in order, shine, standardize, sustain - correct answer 5s Design for Six Sigma - correct answer Matches Customer Needs with Manufacturing Capability Shewhart Cycle - correct answer Plan, Do, Check, Act Pareto Chart - correct...

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6 pages

Written in 2023/2024

Grade A+

RealGrades

classical definition of probability - correct answer P({E}) = (# of outcomes in the event)/(# of outcomes in the sample space) = n(E)/n(S) probability of complement - correct answer P(E) = 1 - P(E^-1) P(A ∪ B) if A and B are mutually exclusive - correct answer P(A ∪ B) = P(A) + P(B) in general P(A ∪ B) if A and B are NOT mutually exclusive - ...

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1 pages

Written in 2023/2024

Grade A+

RealGrades

Census - correct answer A type of survey where everyone in population is measured EX: A survey where for ALL college students. Sample - correct answer People from a population you measure EX: creating a survey with college students of RI. Sampling Frame - correct answer Sampling units within the population - specific group of individuals EX: ...

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15 pages

Written in 2023/2024

Grade A+

RealGrades

Mill's Method of Difference - correct answer if everything's the same except for one thing, then we can really isolate a cause; one variation; precursor to the modern experiment; looking for difference between groups vs within groups (classical) experimental design - correct answer use of control vs experimental groups 4 basic steps to an experiment - correct answer ...

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6 pages

Written in 2023/2024

Grade A+

RealGrades

Which one of the following statements is TRUE? - correct answer As the alpha-level increases, the probability of a Type II error of a hypothesis test decreases. A pharmaceutical company has developed a new medication to lower a person's cholesterol. The advertisement for the new drug cites the results of an experiment comparing the drug with a placebo stating that the cholesterol level had been lowered by an average of 13.2 mg/l with a P-value &...

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3 pages

Written in 2023/2024

Grade A+

RealGrades

types of qualitative data - correct answer ordinal, nominal, dichotomous types of sampling - correct answer simple random, systematic, stratified, cluster systematic sampling - correct answer samples selected according to fixed interval stratified sampling - correct answer individuals randomly selected...

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4 pages

Written in 2023/2024

Grade A+

RealGrades

Defining Experimental Methodology - correct answer Evaluate the influence of some input variable on some output variable while controlling for all other extraneous variables Requirements of Causality - correct answer Whether changes in the IV(s) cause subsequent changes in the DV(s) ex: Facebook Use ----> Grades Manipulation of the Independent Variable - correct answer ...

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6 pages

Written in 2023/2024

Grade A+

RealGrades

The independent-samples test is designed to measure _____________ between two samples that are independent of each other or two subsets within the same sample - correct answer Mean differences A ______________ t-test for two samples means is appropriate when we can assume that the population standard deviations are equal - correct answer Pooled variance Even if the means in the population are equa...

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4 pages

Written in 2023/2024

Grade A+

RealGrades

nominal - correct answer Naming or labeling (example: color of your eyes) Ordinal - correct answer being of a specified position or order in a numbered series interval/ratio - correct answer Ordering and exact distances Stages of Social Research - correct answer 1) Develop hypothesis 2)Develop instrum...

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4 pages

Written in 2023/2024

Grade A+

RealGrades

Retrospective Study - correct answer A retrospective study gathers historical data through records. The outcomes have already occurred before the study Observational Study - correct answer A type of study in which individuals are observed or certain outcomes are measured. No attempt is made to affect the outcome. Designed Experiment - correct answer I...

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2 pages

Written in 2023/2024

Grade A+

RealGrades