College Algebra Project
Saving for the Future
This project is to be completed individually! If the plagiarism software pings your assignment as
being turned in by another student, you will receive a 0 and possibly an XF for the course. It is
In baseball, League A allows a designated hitter (DH) to bat for the pitcher, who is typically a weak hitter. In League B, the pitcher must bat. The common belief
is that this results in League A teams scoring more runs. In interleague play, when League A
The following data represent the time between eruptions and the length of Time, x Length, y Time, x Length, y
eruption for 8 randomly selected geyser eruptions. Complete parts (a) through 12.16 1.84 11.71 1.78
(0) below. 11.73 1.80 12.19 1.89
Construct a condence interval for p1 - p2 at the given level of condence.
x1 = 34, n1 =252, x2 = 38, n2 = 293, 90% condence
The researchers are 90 % condent the difference between the two population proportions, p1 - p2, is between - 0.043 and 0.053 .
To predict future enrollment in a school district, fty households within the district were sampled, and asked to disclose the Number of Children Number of
number of children under the age of ve living in the household. The results of the survey are presen
The data below represent commute times (in minutes) and scores on a well-being survey. Complete parts (a) through (d) below.
CommuteTime (minutes),x 5 20 25 40 60 84 105 D
Well-BeinglndexScore,y 69.2 67.9 67.3 66.4 65.3 64.7 62.8
(a) Find the leastsquares
A baseball player hit 67 home runs in a season. Of the 67 home runs, 25 went to right eld, 24 went to right center eld, 8 went to center eld. 9 went to left
center eld, and 1 went to left eld.
(a) What is the probability that a randomly selected home run
The lengths of a particular animal's pregnancies are approximately normally distributed, with mean u = 255 days and standard deviation 0 = 20 days.
(a) What proportion of pregnancies lasts more than 280 days?
(b) What proportion of pregnancies lasts betwe
A survey was conducted that asked 1019 people how many books they had read in the past year. Results indicated that )_( = 11.5 books and s = 16.6 books.
Construct a 95% condence interval for the mean number of books people read. Interpret the interval.
The data on the right represent the number of trafc Male Female Total G
fatalities by seat location and gender. Determine Passenger 32,879 11,920 44,799
P(female) and P(female|passenger). Are the events Driver 6,418 6,208 12,626
"female" and "passenger" i
Find the sample variance and standard deviation.
5, 49, 15, 50, 33, 22, 29, 28, 26, 26 D-
Choose the correct answer below. Fill in the answer box to complete your choice.
(Round to the nearest hundredth as needed.)
A_ t,2 _
.v 3- s2 = 188.01
Choose the co
A trafc safety company publishes reports about motorcycle fatalities and helmet use. In the rst accompanying data table, the distribution shows the proportion of
fatalities by location of injury for motorcycle accidents. The second data table shows the lo
Conduct a test at the a: 0.10 level of signicance by determining (a) the null and alternative hypotheses. (b) the test statistic, and (c) the P-value. Assume the
samples were obmined independently from a large population using simple random sampling.
The data to the right represent the number of customers waiting for a table 5 7 2 3 7 4 5 1 D
at 6:00 PM. for 40 consecutive Saturdays at Bobak's Restaurant. Complete 11 10 3 6 2 5 4
parts (a) through (h) below. 9 11 6 2 5 4 5 7
13 12 0 2 7 3 6 10
5 10 5
Fourteen jurors are randomly selected from a population of 5 million residents. Ofthese 5 million residents, it is known that 39% are of a minority race. Of the 14
jurors selected, 2 are minorities.
(a) What proportion of the jury described is from a mino
The accompanying data represent the total compensation for 12 randomly selected chief executive ofcers (CEO) and the company's stock performance in a
recent year. Complete parts (a) through (d) below.
a Click the icon to view the CEO data.
(a) One would t
Test the hypothesis using the P-value approach. Be sure to verify the requirements of the test.
Ho: p=0.6l versus H1: p<0.61
n=150, x=87, a=0.1
Use technology to nd the P-value.
P-value = 0.226 (Round to three decimal places as n
Determine whether the variable is qualitative or quantitative.
Is the variable qualitative or quantitative?
A. The variable is quantitative because it is a numerical measure.
B. The variable is quantitative because it is an attribute characteristi
A credit score is used by credit agencies (such as mortgage companies and banks) to assess the creditworthiness of individuals. Values range from 300 to 850,
with a credit score over 700 considered to be a quality credit risk. According to a survey, the m