EXST 2201 EXAM 1 Questions and Verified Answers

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EXST 2201 EXAM 1
Questions and Verified
Answers
Question: science of collecting, organizing and summarizing, and analyzing information
in order to draw conclusions

Ans: statistics


Question: science of data

Ans: statistics


Question: techniques used to collect info

Ans: sampling


Question: techniques used to condense and describe sets of data

Ans: descriptive statistics


Question: major techniques is simple random sampling

these are collecting techniques

Ans: sampling


Question: major techniques are frequency table. histogram, and summary numbers

these are organizing and summarizing techniques

Ans: descriptive statistics

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Question: totality of elements in a well-defined group to be studied

Ans: population


Question: techniques used to systematically draw conclusions about a population from a
set of sample data

Ans: inferential statistics


Question: refers to methods used to interpret data

the goal is generalization of information about a population

this generalization may lead to incorrect conclusions, so inferential statistics uses the
mathematics of probability to quantify the lack of certainty by stating a level of
confidence in conclusion

Ans: inferential statistics


Question: major tools are hypothesis testing and confidence intervals

these are analyzing techniques

Ans: inferential statistics


Question: combinations of the descriptive and inferential techniques discussed above

Ans: statistical methods


Question: the totality of elements in a well-defined group to be studied

Ans: population


Question: a _____ must be well-defined, that is, you must clearly state what exact and
specific elements (people, animals, etc.) do, and do not, belong to the _______

Ans: population


Question: a subset of a population

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Ans: sample


Question: the larger the ______ size the better, but the method of _______ is more
important than the ______ size

Ans: sample




sampling




sample


Question: one object from the population

Ans: individual


Question: goal of sampling is to collect:

1._______
2._______

Ans: 1. a measurable number of individuals that are,




2. representative of the population


Question: four basic sampling techniques

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Ans: simple random sampling




stratified sampling




systematic sampling




cluster sampling


Question: sampling can be done:

1.____
2.____

Ans: 1. with replacement




2. without replacement


Question: method of choosing a sample such that each sample of the same size has the
same chance of being chosen

Ans: simple random sampling


Question: each individual in the population has an equal chance of being chosen to be in a
sample

Ans: simple random sampling


Question: 1. Does remove selection bias from the sample
2. Does not affect the natural variability of the data
3. Does not guarantee a representative sample