Math 221 quiz - Study guides, Class notes & Summaries

MATH 221 Week 3 Quiz: Statistics for Decision-Making (v5) Question: (CO 1) A survey of 385 people who like wild sweaters found that 74% had a wild holiday sweater. What is the population and what is the sample? Question: (CO 1) The measurements of 100 products from the assembly line show that 99% are correct. Is this percentage a parameter or a statistic and why? Question: (CO 1) Classify the data of the number of customers at a restaurant. Question: (CO 1) The data set that lists the runs score...

MATH-221 Week 3 Quiz: Statistics for Decision-Making (v6) Question: (CO 1) Among 500 people at the concert, a survey of 35 found 28% found it too loud. What is the population and what is the sample? Question: (CO 1) A survey of all 35 employees at a small company finds that 89% of them like the recent changes to the company’s benefits. Is this percentage a parameter or a statistic and why? Question: (CO 1) Classify the data of the number of customers at a restaurant. Question: (CO 1) The data ...

1 GRE GRE 2 Section 1: Sec One (1 to 20) Details: Analogies Part 1 Practice Questions: QUESTION: 1 DRIP : GUSH A. cry : laugh B. curl : roll C. stream : tributary D. dent : destroy E. bend : angle Answer: D QUESTION: 2 WALK : LEGS A. blink : eyes B. chew : mouth C. dress : hem D. cover : book E. grind : nose Answer: B QUESTION: 3 ENFRANCHISE : SLAVERY A. equation : mathematics B. liberate : confine C. bondage : subjugation D. appeasement : unreasonable E. anato...

Question 1 2 / 2 pts Let x represent the number of cars in a parking lot. This would be considered what type of variable: Homework Help: 3DA. Discrete versus continuous variables (Links to an external site.) (DOCX) Lagging Continuous NonsensicalCorrect! Discrete Question 2 2 / 2 pts Let x represent the number of players on a sports field. This would be considered what type of variable: Homework Help: 3DA. Discrete versus continuous variables (Links to an external site.) (DOCX) Correct! Discrete ...

MATH 221 Week 3 Quiz: Statistics for Decision-Making (v1) Question: A survey of 128 DeVry statistics students found that 83% read the announcements each week. What is the population and what is the sample? Question: In asking all 359 second graders in a school district, it is found that on average, these second graders have 2.5 pets. Is this number a parameter or a statistic and why? Question: (CO 1) Classify the data of the top grossing movies for 2017: Question: (CO 1) The data that list...

MATH 221 Week 7 Quiz: Statistics for Decision-Making (May 2021) Question: (CO 6) The coefficient of determination is represented by what notation? Question: (CO 6) Two variables have a negative non- linear correlation. Does the independent variable increase or decrease as the dependent variable increases? Question: (CO 6) Find the regression equation for the following data set Question: (CO 6) An instructor wants to determine if a longer lesson would improve student test scores. Which variable w...

MATH 221 Week 5 Quiz (v1) Question: (CO 3) Consider the following table. If you … the probability distribution for these data, what would … the probability of 60-69? Question: (CO 3) Consider th e following table of hours worked by part-time employees. These employees must work in 5-hour blocks. Find the mean of this variable. Question: (CO 3) Consider the following table. Find the variance of this variable. Question: (CO 3) Consider the following table. Find the standard deviation of this v...

MATH 221 Week 5 Quiz: Statistics for Decision-Making Question 1 2 / 2 pts (CO 4) Consider the following table: Age Group Frequency 18-29 983 30-39 784 40-49 686 50-59 632 60-69 54 1 70 and over 527 If you created the probability distribution for these data, what would be the probability of 40-49? 0.237 0.425 0.189 Correct! 0.165 Question 2 2 / 2 pts (CO 4) Consider the following table of hours worked by part-time employees. These employees must work in 5 hour blocks. Weekly hours worked Probabil...

Question: (CO 3) Consider the following table. If you … the probability distribution for these data, what would … the probability of 40-49? Question: (CO 3) Consider the following table of hours worked by part-time employees. These employees must work in 5-hour blocks. Find the mean of this variable. Question: (CO 3) Consider the following table. Find the variance of this variable. Question: (CO 3) Consider the following table. Find the standard deviation of this variable. Question: (CO 3) F...

Question 1 2 / 2 pts (CO 1) A survey of 1272 pre-owned vehicle shoppers found that 8% bought the extended warranties. What is the population and what is the sample? Population: 1272 pre-owned vehicle shoppers; Sample: pre-owned vehicle shoppers Population: pre-owned vehicle shoppers; Sample: the 8% that bought extended warrantiesCorrect! Population: pre-owned vehicle shoppers; Sample: 1272 pre-owned vehicle shoppers Population: 1272 pre-owned vehicle shoppers; Sample: the 8% that bought ...