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Elementary Statistics Exam 1 Review – questions with Solutions
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Elementary Statistics Exam 1 Review – questions with Solutions
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Elementary Statistics Exam 1 Review– questions with Solutions
Population - - complete collection of all individuals to be studied
- Sample - - a sub collection of members selected from a population
- The Gallup organization contacts 1,028 teenagers who are 13 to 17 years
of age and live in the United States and asks whether or not they had been
prescribed medications for any mental disorders, such as depression or
anxiety. What is the population and what is the sample? - - Population: 13 to
17 years of age
Sample: 1,028 teenagers
- A quality-control manager randomly selects 50 bottles of Coca-cola that
were filled on October 15 to asses the calibration of the filling machine. What
is the population and sample? - - Population: All bottles filled on October the
15th
Sample: 50 bottles of Coca-cola
- Parameter - - a numerical measurement describing some characteristic of
a population
- statistic - - a numerical measurement describing some characteristic of a
sample
- The average score for a class of 28 students taking a calculus exam was
72%. Is 72% a parameter or a statistic? - - Parameter
- In a national survey on substance abuse, 66.4% of the respondents who
were full time college students aged 18 to 22 reported using alcohol within
the pass month. Parameter or Statistic? - - Statistic
- Only 12 men walked on the moon. The average age of these man at the
time of their moonwalks was 39 years, 11 months, 15 days. Parameter or
Statistic? - - Parameter
- Quantitive data - - numbers obtained by counting or measuring
- Qualitive data - - data that consists of names or labels
- Nation of siblings. Quantitative or qualitative(C)? - - C
- number of siblings. Quantitative or qualitative(C)? - - Q
, - discrete data - - Numerical data values that can be COUNTED
- continuous data - - Data that can take on any value. There is no space
between data values for a given domain. Graphs are represented by solid
lines.
- Runs scored each season. Discrete or Continuous? - - D
- Temperature on a randomly selected day in Memphis, Tennessee. Discrete
or Continuous? - - C
- Volume of water lost each day through a leaky faucet. Discrete or
Continuous? - - C
- Levels of Measurement - - nominal, ordinal, interval, ratio
- Levels of Measurement: Nominal - - NAMES, LABELS, CATEGORIES Cannot
be arranged in an ordering scheme (i.e., low to high) (e.g., eye colors)
- Levels of Measurement: Ordinal - - Values can be arranged; DIFFERENCES
(by subtraction) MEANINGLESS or cannot be determined. (e.g., course
grades; rankings)
- Levels of Measurement: Interval - - With the properties of the nominal
level of measurement and the differences in the values have meaning. A
value of zero does not mean the absence of the quantity and arithmetic
operations(addition/subtraction) can be preformed
- Levels of Measurement: Ratios - - Variables with the properties of the
interval level of measurement and ratios have meaning. A value of zero
means the absence of the quantity(multiplication/division can be preformed).
- Colors of M&M's (N,O,I,R) - - nominal (n)
- The author rated the movie star wars: The Force Awakens with 5 stars on a
scale of 5 stars (NOIR) - - O, Ordinal
- Baseball statistician Bill James records the years in which the baseball
World Series is won by a team from the National League (NOIR) - - I, Interval
- In a study of fast food services times, a researcher records the time
intervals of drive-up customers beginning when they place their order and
ending when they receive their orders. - - R, Ratio
- Body Temperature (NOIR) - - I, Interval
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