Math 221 quiz - Study guides, Class notes & Summaries

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...

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 6 Quiz) Question: (CO 5) A company claims that its heaters last more than 5 years. Write the null and alternative hypotheses and note which is the claim. Question: (CO 5) An executive claims that her employees spend no more than 2.5 hours each week in meetings. Write the null and alternative hypotheses and note which is the claim. Question: (CO 5) In hypothesis testing, a key element in the structure of the hypotheses is that the null hypothesis has the Question: (CO 5) A landscap...

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 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 ...

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...

Lab Overview Scenario/Summary Open the Week 4 Lab Document(Links to an external site.)Links to an external complete the lab for this week. All of the directions are included in the docum ent. The data for this lab is distributed by your professor. The document includes places where you need to input the answers. Any place where you see a gray box is where you need to put an answer. Deliverables Fill in the document, save it with your name in the title, and submit the document Required Software ...

MATH 221 Week 7 Quiz: Statistics for Decision-Making (v1) Question: (CO 4) From a random sample of 55 businesses, it is found that the mean time that employees spend on personal issues each week is 4 .9 hours with a standard deviation of 0.35 hours. What is the 95% confidence interval for the amount of time spent on personal issues? Question: (CO 4) If a confidence interval is given from 8.56 to 10.19 and the mean is known to … 9.375, what is the margin of error? Question: (CO 4) If the popula...