STAT 3090 quiz 1

Identify the population being studied. The number of hours a group of 4 children in Mrs. Smith's kindergarten class play outside in a day.

All children in Mrs. Smith's kindergarten class

For the following situation determine what type of sampling was used. The mayor of a certain city would like to do a poll on the approval rating of a new program that has been passed. Each voting district in the area is put into one of four groups. One of the four groups is randomly selected and all households in that group are sent a survey.

Cluster Sample

In a experiment, neither clinicians nor subjects know whether the subject will receive a treatment.

Double-blind

Determine whether the statement describes a descriptive or inferential statistic. A survey of 2023 people revealed that 54% have a college degree; therefore it can be assumed that 54% of the U.S. population has a college degree.

Inferential Statistic

Determine if the numerical value describes a population parameter or a sample statistic. 50% of all instructors at your school teach 2 or more classes.

Population Parameter

Classify the following data. Indicate whether the data is qualitative or quantitative, indicate whether the data is discrete, continuous, or neither, and indicate the level of measurement for the data. You order a pizza. The kind of pizza you order is recorded by entering the appropriate number on an order form. The numbers used are given below. 1) Pepperoni 2) Mushroom 3) Black Olive 4) Sausage

Qualitative, Neither, Nominal

Classify the following data. Indicate whether the data is qualitative or quantitative, indicate whether the data is discrete, continuous, or neither, and indicate the level of measurement for the data. Fifty people were asked to respond to a survey question regarding how frequently they used their credit card. The categories they were asked to choose from are given below: 1) Infrequently 2) Sometimes 3) Frequently

Qualitative, neither, ordinal

Classify the following data. Indicate whether the data is qualitative or quantitative, indicate whether the data is discrete, continuous, or neither, and indicate the level of measurement for the data. The lifetimes of 100 five volt batteries is recorded.

Quantitative, Continuous, Ratio

Classify the following data. Indicate whether the data is qualitative or quantitative, indicate whether the data is discrete, continuous, or neither, and indicate the level of measurement for the data. The IQ scores of students at the local college.

Quantitative, Discrete, Interval

Determine if the numerical value describes a parameter or a statistic. A recent poll of 3729 students showed that the average number of hours they study per week is 7.9.

Sample Statistic

For the following situation determine what type of sampling was used. A research company believes teens today are getting less than the recommended hours of sleep. The company takes a list of 2000 teen volunteers and assigns each volunteer a number. A random number generator is used to select 350 individuals to take part in a sleep survey.

Simple random sample

For the following situation determine what type of sampling was used. A research company believes teens today are getting less than the recommended hours of sleep. The company takes a list of 2000 teen volunteers and puts the teens into groups based on which area of the country they live in. The company randomly selects 50 teens from each region to take part in the sleep study.

Stratified Random Sample

Identify the sample chosen for the study. The number of times 12 out of 31 students on your floor order pizza in a week.

The 12 students on your floor