Chapter 1 Reveiw
Calculate the value of the range. 8, 10, 5, 13, 11, 1
13-1=12
The numbers of each color of jelly beans in a jar (assuming they are all whole) are an example of which type of data?
Discrete
The numbers of red cars on various roads are an example of which type of data?
Discrete
A general manager of a restaurant wants to study if a need for additional staffing exists.
Obersvational
A car wash operator wants to find out his average annual profits.
Observational
A recent poll of 2181 students showed that the average number of hours a college student studies per week is 9.5.
Sample Statistic
The number of times 12 out of 27 students on your floor order pizza in a week.
The 12 students on your floor.
If the data was taken from another source, the source should be indicated.
True
In a _______ experiment, only the subject does not know whether they have been placed in the control or experimental group.
single-blind
The _______ receives an active drug while the other group does not.
treatment group
Calculate the standard score of the given x value, x = 74.5, where x¯¯¯ = 83, s = 5.6. Round your answer to two decimal places.
z = (x − x¯)/s
Calculate the standard score of the given x value, x = 27.3, where µ = 25.3, σ = 3.2. Round your answer to two decimal places.
z= x-u/o
Determine the median of the given data. −14, 11, 11, −14, 9, 9
11
Determine the mean of the given data. −14, 11, 11, −14, 9, 9
12/6=2
Suppose that IQ scores have a bell-shaped distribution with a mean of 98 and a standard deviation of 13. Using the empirical rule, what percentage of IQ scores are less than 111? Please do not round your answer.
84
The number of hours a group of 15 children in Mrs. Smith's kindergarten class sleep in a day.
All children in Mrs. Smith's kindergarten class.
The number of hours a group of 15 children in Mrs. Smith's kindergarten class sleep in a day
All children that sleep.
The heights of 14 out of the 23 cucumber plants at Mr. Lonardo's greenhouse.
All cucumber plants at Mr. Lonardo's greenhouse.
Favoritism, partiality, and preconceived notions are types of _______.
Bias
_______ occurs when a study tends to favor certain results.
Bias
A pollster interviews each member from each of the ten randomly chosen math classes at a university.
Cluster Sampling
A scientist interviews each member from each of the fifteen randomly chosen freshmen dormitories at universities across the country.
Cluster Sampling
Pounds gained by persons in your class during the first month of the semester are an example of which type of data?
Continuous
When conducting a medical study a researcher should not apply a process to produce a desired response to the _______.
Control Group
The average number of hours students in your statistics class study per week is 3.9.
Descriptive Statistic
The average price of a car at the new car dealership in town is $28,900.
Descriptive Statistics
Determine if the data set is unimodal, bimodal, multimodal, or has no mode. Identify the mode(s), if any exist. −14, 11, 11, −14, 9, 9
No Mode
In a medical experiment the control group is often given a _______.
Placebo
The amount of money each person in your biology class spends on books in a semester.
Population
The final exam scores in your math class.
Population
The heights of all the tomato plants at Mr. Lonardo's greenhouse
Population
The average number of hours students in your statistics class study per week is 12.2
Population Parameter
The average price of a house in the new subdivision is $257,000.
Population Parameter
Eye colors are an example of which type of data?
Qualitative
Sizes of popcorn at the movie theater are an example of which type of data?
Qualitative
A company's international marketing group asked the following question to residents of 50 countries: "What has been your experience with American products?" 1) Below Average 2) Average 3) Above Average 4) Good to Excellent
Qualitative Neither: Discrete or Continuous Ordinal
A supervisor must give a summary evaluation rating from among the choices given below: 1) Poor 2) Fair 3) Good 4) Very good 5) Excellent
Qualitative Neither: Discrete or Continuous Ordinal
Pounds gained by persons in your class during the first month of the semester are an example of which type of data?
Quantitative
The temperature in Fahrenheit of a U.S. city each day for a month.
Quantitative Continuous Interval
Birth years of each person in your family.
Quantitative Discrete Interval
The heights of 48 randomly selected female students.
Quantitative, Continuous, Ratio
The heart beats per minute of 40 randomly selected people.
Quantitative, Discrete, Ratio
A survey of 373 people revealed that 66% of the U.S. population eats while they drive.
Sample Statistic
Collecting data from a sample that does not represent the population is called a(n) _______.
Sampling Error
Errors in a study resulting from the way the sample was chosen are called _______.
Sampling Error
The number of hours a group of 12 children in Mrs. Smith's kindergarten class sleep in a day.
The 12 children selected in Mrs. Smith's kindergarten class.
The number of hours a group of 15 children in Mrs. Smith's kindergarten class sleep in a day.
The 15 children selected in Mrs. Smith's indergarten class
The high school GPAs of a sample of 22 professors at the local college.
The 22 Professors at the local college
The types of cars of a sample of 24 employees at the local news network.
The 24 employees at the local news network.
The purpose of a single-masked experiment is to test whether a _______ produces the anticipated response.
Treatment
An experiment in which only the subject does not realize whether they received a placebo or treatment is _______.
single-blind
An experiment in which only the subject does not realize whether they received a treatment or placebo is _______.
single-blind
