STA Q.1

Determine whether the value given below is from a discrete or continuous data set. The volume of cola in a can is 10.7 oz.

A continuous data set because there are infinitely many possible values and those values cannot be counted

Determine whether the value given below is from a discrete or continuous data set. In a test of a method of gender selection comma 706 couples used the XSORT methodIn a test of a method of gender selection, 706 couples used the XSORT method and 419 of them had baby girls.

A discrete data set because there are a finite number of possible values there are a finite number of possible values

Do people walk faster in an airport when they are departing​ (getting on a​ plane) or after they have arrived​ (getting off a​ plane)? An interested passenger watched a random sample of people departing and a random sample of people arriving and measured the walking speed​ (in feet per​ minute) of each. What type of study design is being​ performed?

Observational study

The​ _________________ is/are the entire group of individuals or items being studied.

Population

Identify which of these types of sampling is​ used: random,​ systematic, convenience,​ stratified, or cluster. Upper A market researcher has partitioned all residents of a certain region into categories of young left parenthesis age 0 dash 30 right parenthesis comma middle aged left parenthesis age 31 dash 60 right parenthesis comma and senior left parenthesis over age 60 right parenthesis . She is surveying 40 people from each category.

Stratified sampling

Identify the type of sampling​ used: random,​ systematic, convenience,​ stratified, or cluster. To estimate the percentage of defects in a recent manufacturing​ batch, a quality control manager at IBM selects every 16th computer that comes off the assembly line starting with the tenth until she obtains a sample of 40 computers.

Systematic

Identify the type of sampling​ used: random,​ systematic, convenience,​ stratified, or cluster. To estimate the percentage of defects in a recent manufacturing​ batch, a quality control manager at Sony selects every 12th music CD that comes off the assembly line starting with the second until she obtains a sample of 120 music CDs.

Systematic

State whether the data described below are discrete or​ continuous, and explain why. The amounts of time that different surgical procedures take at a hospital nothing

The data are continuous because the data can take on any value in an interval.

State whether the data described below are discrete or​ continuous, and explain why. The movie ratings of a critic with possible ratings being 0 stars comma one half star comma 1 star comma and so onThe movie ratings of a critic with possible ratings being 0 stars, 1/2 star, 1 star, and so on up to 5 stars

The data are discrete because the data can only take on the data can only take on specific values.

Determine whether the given value is a statistic or a parameter. A homeowner measured the voltage supplied to his home on all 365 days of a given year​, and the average​ (mean) value is 117.3 volts.

The given value is a parameter for the year because the data collected represent a population.

Determine whether the given value is a statistic or a parameter. A homeowner measured the voltage supplied to his home on one day a week for a given year on one day a week for a given year​, and the average​ (mean) value is 127.7127.7 volts.

The given value is a statistic for the year because the data collected represent a sample.

What does it mean for the findings of a statistical analysis of data to be statistically​ significant?

The likelihood of getting these results by chance is very small.

Determine which of the four levels of measurement​ (nominal, ordinal,​ interval, ratio) is most appropriate for the data below. Serial numbers on cans

The nominal level of measurement is most appropriate because the data cannot be ordered.

Determine which of the four levels of measurement​ (nominal, ordinal,​ interval, ratio) is most appropriate for the data below. Volume of planets in cubic meters

The ratio level of measurement is most appropriate because the data can be ordered comma differences left parenthesis obtained by subtraction right parenthesis can be found and are meaningful comma and there is a natural starting zero point.

Identify which of these types of sampling is​ used: random,​ systematic, convenience,​ stratified, or cluster. Upper A market researcher has randomly selected four businesses in a certain region. She is a surveying all the employees from each business.surveying all the employees from each business.

cluster sampling

In a television​ advertisement, a company called​ "Waist Away" claimed the workout program on their set of DVDs would help people lose weight more than any other DVD workout program. To test this​ claim, an independent​ company, called​ "Slim Down," selected one other DVD program. They then randomly assigned half the volunteers to the Waist Away program and the other half to the Slim Down program. Each participant was weighed before they started the program and then regularly participated in their assigned program for one month. After one​ month, each participant was weighed again. The percent of weight lost was recorded for each​ person, where negative values indicated a weight gain. What type of study was​ performed?

experiment