## [answered] Brock Leo Driskill Term Project 1 November 15, 2016 1. Case

Brock Leo Driskill

Term Project 1

November 15, 2016

1. 2. Case 1

Girls

Use of Social Networking Sites

Yes

166

No

34

Totals

200 Boys Totals 156

44

200 322

78

400 322

=0.805?80.5

400 The Probability that a teen uses social networking sites is

80.5%. 3. 166

=0.83?83

200 The Probability that a teen girl uses social networking sites is

83%.

4. Yes, this act would provide protection for teens. There is a high rise

in Social Networking sites by young teens they need this necessary

protection. There was a 80.5% of teens using social Networking sites

which is only a 19.5% of teen not using. Case 2

1. The Probability that at least one in a group of 10 New York

teenagers smoked in 2007 is .3821 or 38.2%.

P=.085 Q=.915

10 !

1

10?1

X=

?(1?.085) ?(.915)

( 10?1 ) ! 1 !

3628800

X=

? ( 1?.085 ) ? ( .4495622608 )

362880

X =10? .0382127922

X =.3821 2. The probability that at least one in a group of 10 New York City

teenagers smoked in 2001 is .3082 or 30.8%.

P=.176 Q=.824

10 !

1

10?1

X=

?(1?.176) ?(.824)

( 10?1 ) ! 1 !

3628800

X=

? ( 1?.176 )1 ? ( .824 )10?1

362880

X =10?(.030821769)

X =.3082 3. The probability that at least one in a group of 10 New York City

teenagers smoked in 1997 is .2188 or 21.9%.

P=.23 Q=.77

10 !

X=

? ( 1?.23 )1 ? ( .77 )10?1

( 10?1 ) ! 1 !

3628800

X=

? ( 1?.23 ) ? ( .0951516944 )

362880

X =10? ( .0218848897 )

X =.2188 4. There has been a significant change of 16.3% in teenage smoking

between 1997 and 2007. These changes do to I believe the harm

that cigarettes do to the human body and it is now harder for

teenagers to obtain cigarettes. Chase 3

Needed for problems ?=19.2 , ? =2.6 1. UNDERWEIGHT

For less than 5th percentile range.

P=0.05 Z=?1.645 (from table)

X =? +Z?

X =19.2+ (?1.645 ?2.6 )=14.923

x&lt; 14.923 For less than 14.2 BMI range.

14.2?19.2 ?5

= =?1.92308??1.92

2.6

2.6 Looking at the table the value for that z score is 0.0274

The probability is 2.7%

HEALTHY WEIGHT

For between 5th and 85th Percentile Range.

P=0.05 Z=?1.645 (from table)

X =? +Z?

X =19.2+ (?1.645 ?2.6 )=14.923

1.03?1.04

?

?

P=0.85 Z=?

X =? +Z?

X =19.2+ (1.035 ? 2.6 )=21.891

21.891&lt; x&gt; 14.923 For Between 14.2 and 19.4 BMI Range

14.2?19.2 ?5

= =?1.92308??1.92

2.6

2.6 Going into excel the value for that z score is 0.0274

19.4?19.2 0.2

=

=0.076923?0.08

2.6

2.6 Going into excel the value for that z score is 0.5307

P=0.5307?0.0274=0.5033 The probability for between 14.2 and 19.4 is 50.3%.

OVERWEIGHT

For between 85th and 95th Percentile Range. 1.03?1.04

?

?

P=0.85 Z=?

X =? +Z?

X =19.2+ (1.035 ? 2.6 )=21.891

1.65+1.64

?

?

P=0.95 Z=?

X =? +Z?

X =19.2+ (1.645 ? 2.6 )=23.477

21.891&lt; X &gt;23.477 For between 19.4 and 22.2 BMI Range.

19.4?19.2 0.2

=

=0.076923?0.08

2.6

2.6 Going into excel the value for that z score is 0.5307

22.2?19.2 3

=

=1.15385?1.15

2.6

2.6 Going into excel the value for that z score is 0.8757

P=0.8757?0.5307=0.345 The probability for between 19.4 and 22.2 is 34.5%.

OBESE

For more than 95th Percentile Range.

1.65+1.64

?

?

P=0.95 Z=?

X =? +Z?

X =19.2+ (1.645 ? 2.6 )=23.477

X &gt;23.477 For more than 22.2 BMI Range.

22.2?19.2 3

=

=1.15385?1.15

2.6

2.6 Going into excel the value for that z score is 0.8757

P=1?0.8757=0.1243 The probability for more than 22.2 is 12.4%.

2. The Health Officials concern is justifiable Because there are almost

just as many unhealthy children than there are overweight, obese,

and underweight children which comes in at 49.6% of the total children in the town. While the heathy children come in at 50.3%

only a 0.7 percentage difference between the two category?s.

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