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#3 With complete answer, solution and table

#3 With complete answer, solution and table

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.3: Measures Of Spread
Problem 26PFA
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#3 With complete answer, solution and table
1. The cost of a daily newspaper varies from city to city. However, the variation among prices rem ains steady with a standard deviation of 20 cents. A study was done to test the daim that the mean cost of a daily newspaper is $1.00. Twelve costs yield a mean cost of 95 cents with a standard deviation of 18 cents. Do the data support the claim at the 1% level (15pts) 2. An article in the Daily Bulletin stated that students in Angeles City University take 4.5 years on zverage to finish their undergraduate degrees. Suppose you believe that the mean time is longer. You conduct a survey of 49 students and obtain a sample mean of 5.1 with a sample standard deviation of 1.2. Do the data support your claim at the 1% level? (15pts) 3. Table below shows the birth rate per 1000 population during the years 1990-1996. Year 1990 1991 1992 1993 1994 1995 1996 Birth rate per 1000 16.5 16.3 15.9 15.5 15.2 14.8 14.3 2 Graph the data b. Find the least squares Ime fitting the data c Predict the birth rate in 2000, assuming the trend contimues. (20pts) 4. Table below shows the average temperature and precipitation in a city for the month of July during the years 1989-1998. Find the correlation coefficient r nd p and their verbal interpretation. (10pts) Year 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 Temperature (F) 78.1 71.8 75.6 72.7 75.3 73.6 75.1 75.3 73.8 70.4 Precipitation (in) 6.23 3.64 3.42 2.84 1.83 2.82 4.04 2.56 1. 18 4.19
Transcribed Image Text:1. The cost of a daily newspaper varies from city to city. However, the variation among prices rem ains steady with a standard deviation of 20 cents. A study was done to test the daim that the mean cost of a daily newspaper is $1.00. Twelve costs yield a mean cost of 95 cents with a standard deviation of 18 cents. Do the data support the claim at the 1% level (15pts) 2. An article in the Daily Bulletin stated that students in Angeles City University take 4.5 years on zverage to finish their undergraduate degrees. Suppose you believe that the mean time is longer. You conduct a survey of 49 students and obtain a sample mean of 5.1 with a sample standard deviation of 1.2. Do the data support your claim at the 1% level? (15pts) 3. Table below shows the birth rate per 1000 population during the years 1990-1996. Year 1990 1991 1992 1993 1994 1995 1996 Birth rate per 1000 16.5 16.3 15.9 15.5 15.2 14.8 14.3 2 Graph the data b. Find the least squares Ime fitting the data c Predict the birth rate in 2000, assuming the trend contimues. (20pts) 4. Table below shows the average temperature and precipitation in a city for the month of July during the years 1989-1998. Find the correlation coefficient r nd p and their verbal interpretation. (10pts) Year 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 Temperature (F) 78.1 71.8 75.6 72.7 75.3 73.6 75.1 75.3 73.8 70.4 Precipitation (in) 6.23 3.64 3.42 2.84 1.83 2.82 4.04 2.56 1. 18 4.19
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