A statistics professor administered an exam to three different classes. The 8:00 class had 20 students and an average score of 82.4. The 9:00 class had 24 students and an average of 78.9. The 29 students in the 10:00 class had an average of 87.3. Calculate the overall average for all three classes combined.

Q: Last year at Townsburg High School, 28% of the graduating seniors took the ACT exam, 34% of the…

A: It is given that the proportion of the graduating seniors took the ACT exam is 0.28, the proportion…

Q: A busy grocery store in San Antonio captures the time per item it takes to check out customers…

A: Given Time per Item Scanned (Cashier 1) Time per Item Scanned (Cashier 2) 20 24 10 16 52 19…

Q: A group of college DJs surveyed students to find out what music to play for their upcoming party.…

A:

Q: About 25% of the population watches the evening television news coverage as well as the soap operas.…

A:

Q: A busy grocery store in San Antonio captures the time per item it takes to check out customers…

A: Given data, Cashier 1 Cashier 2 20 24 10 16 52 19 60 55 65 45 58 36 40 5 38 29…

Q: On Wednesday the average temperature outside was 40F. On thursday and friday it was 48F and 38F,…

A: Given information: Given that on Wednesday, the average temperature is 40F. On Thursday and Friday,…

Q: Jackie and Angel both took exams last week. Jackie scored a 82 while Angel scored a 77. The mean and…

A: It is given that For JackieMean = 91SD = 3 For AngelMean = 80SD = 2

Q: The average (mean) score on an exam was 76.375 in a class consisting of 21 Administration students…

A: From the provided information, The average score on an exam was 76.375 consisting 21 Administration…

Q: Jackie had a grade point average of 3.3 at the community college she attended. She then transferred…

A: Observe that the GPA is calculated as follows.

Q: AN OUTDOOR HOT DOG VENDOR SELLS AN AVERAGE OF 60  HOT DOGS PER DAY IN DRY WEATHER AND AN AVERAGE OF…

A: The outdoor hot dog vendor sells an average of 60 hot dogs per day in dry weather and an average of…

Q: A busy grocery store in San Antonio captures the time per item it takes to check out customers…

A: Hence, Q3 = 49 Standard deviation = 16.7053 Range = 55

Q: The last Harry Potter book went on sale at 12:01 a.m. on July 21, 2007. The publisher Scholastic…

A: The portion of a number can be evaluated by multiplying the fraction of the portion required to the…

Q: Michelle's Mega Muffins recently sold 6 muffins, of which 3 were poppy seed muffins. Considering…

A: Given that, Michelle's Mega Muffins sold 6 muffins, of which 3 were poppy seed muffins. To find how…

Q: In a survey of 1150 adult males, 805 said they use the Internet. In a survey of 1050 females, 746…

A: There are two dependent variables which are males and females. The independent variable is using of…

Q: Jose has scored  79 ,  84 , and  85  on his previous three tests. What score does he need on…

A: Step 1:. The formula for average is:Average=Number of scoresSum of all scores​ Let's apply this…

Q: The average of Molly's 5 quiz scores is 9.0.If her highest test score is dropped , her average is…

A:

Q: An article in the Archives of Internal Medicine reported that in a sample of 224 men, 73 had…

A: Here 224 men and 232 women are selected randomly. 73 of the men had elevated cholesterol levels,…

Q: A 34% decrease resulted in 21 business in the downtown area. What was the number of businesses…

A:

Q: author De Veaux Christensen Thomas Stewart Simmons Alexander Miller Cheeseman Berg Raymond Atkins…

A: Given: n = 14 Formula Used: Correlation coefficient r = n∑XY-∑X∑Yn∑X2-∑X2n∑Y2-∑Y2

Q: Brandon's score in the high jump at a track and field event showed that he was only able to jump…

A: B's score in the high jump at a track and field event showed that he was only able to jump higher…

Q: Drew received a mark of 94% on his Data Management test and a mark of 89% on his Calculus test.…

A: Given dataDrew received a mark of 94% on his data management testAnd a mark of 89% on his calculus…

Q: According to the U.S. Census Bureau, in 1950, 39.3 million families had a child under 18 at home.…

A: Given that, the 39.3 million family had a child under 18 in 1950 and the number had decreased 8.9%.…

Q: The average salary of male employees in a firm was $520 and that of females was $420. The mean…

A: We have given that  The average salary of male employees =$520 And the average salary of females…

Q: Calculate a student's grades used weighted average follows. The second test was the midterm, it is…

A:

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.