Related questions with answers

A study by the National Athletic Trainers Association surveyed random samples of 1679 high school freshmen and 1366 high school seniors in Illinois. Results showed that 34 of the freshmen and 24 of the seniors had used anabolic steroids. Steroids, which are dangerous, are sometimes used in an attempt to improve athletic performance. Do the data give convincing evidence of a difference in the proportion of all Illinois high school freshmen and seniors who have used anabolic steroids? State appropriate hypotheses for a test to answer this question. Define any parameters you use.

A Gallup Poll in November 2008 found that $59\%$ of the people in its sample said "Yes" when asked, "Would you like to lose weight?" Gallup announced: "For results based on the total sample of national adults, one can say with $95\%$ confidence that the margin of (sampling) error is $\pm 3$ percentage points." (a) What is the $95\%$ confidence interval for the percent of all adults who want to lose weight? (b) Explain clearly to someone who knows no statistics why we can't just say that $59\%$ of all adults want to lose weight. (c) Then explain clearly what " $95\%$ confidence" means. (d) As Gallup indicates, the $3\%$ margin of error for this poll includes only sampling variability ( what they call "sampling error"). What other potential sources of error ( Gallup calls these "nonsampling errors") could affect the accuracy of the $59\%$ estimate?

For the following exercise, see the example mentioned.

The number of hours worked in a week for 30 workers selected at random from the 2012 General Social Survey appears in the following frequency table. Find the standard deviation.

Interval	Frequency
0-9	1
10-19	3
20-29	5
30-39	3
40-49	12
50-59	3
60-69	1
70-79	2

Question

The table gives the average monthly high and low temperatures, in degrees Fahrenheit, for Raleigh, North Carolina, over the course of a year.

Month High Low

January 49 30

February 53 32

March 61 40

April 71 48

May 78 57

June 84 65

July 88 69

August 86 68

September 80 62

October 70 49

November 61 42

December 52 33

Find the mean and median for each of the given subgroups.

The high temperatures

Solution

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Answered 2 years ago

Step 1

1 of 6

The given table is :

Month	High	Low
January	49	30
February	53	32
March	61	40
April	71	48
May	78	57
June	84	65
July	88	69
August	86	68
September	80	62
October	70	49
November	61	42
December	52	33

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More related questions

Stem	Leaves
2	7
3
3
4	01
4	899
5	4
5	5
6	122
6	58
7	00124
7	9
8	0044
8	5679
9	00223334
9	5788

advanced math

For the following exercise, use the following table, which gives the monthly returns for the Janus Growth and Income S Fund, the S&P 500, and the sector returns for large growth funds.

Month	Janus	S&P	Large Growth	Month	Janus	S&P	Large Growth
MAY 2013	$1.33$	$2.34$	$2.63$	NOV 2011	$-0.8$	$-0.22$	$-1.06$
APR 2013	$3.01$	$1.93$	$1.25$	OCT 2011	$14.17$	$10.93$	$11.78$
MAR 2013	$4.26$	$3.75$	$3.19$	SEP 2011	$-10.38$	$-7.03$	$-8.45$
FEB 2013	$1.54$	$1.36$	$0.65$	AUG 2011	$-7.94$	$-5.43$	$-6.67$
JAN 2013	$4.8$	$5.18$	$4.75$	JUL 2011	$-2.81$	$-2.03$	$-1.27$
DEC 2012	$1.8$	$0.91$	$0.52$	JUN 2011	$-1.21$	$-1.67$	$-1.5$
NOV 2012	$0.56$	$0.58$	$1.95$	MAY 2011	$-1.07$	$-1.13$	$-1.27$
OCT 2012	$-1.87$	$-1.85$	$-3.01$	APR 2011	$3.67$	$2.96$	$2.91$
SEP 2012	$1.84$	$2.58$	$2.3$	MAR 2011	$-0.24$	$0.04$	$0.37$
AUG 2012 12	$2.77$	$2.25$	$3.27$	FEB 2011	4	$3.43$	$3.27$
JUL 2012	$2.11$	$1.39$	$0.47$	JAN 2011	$2.38$	$2.37$	$1.83$
JUN 2012	$2.8$	$4.12$	$2.6$	DEC 2010	$4.93$	$6.68$	$5.54$
MAY 2012	$-7.19$	$-6.01$	$-7.37$	NOV 2010	$-1.18$	$0.01$	$1.08$
APR 2012	$-0.94$	$-0.63$	$-0.7$	OCT 2010	$3.65$	$3.8$	$4.62$
MAR 2012	$2.32$	$3.29$	$3.37$	SEP 2010	$9.31$	$8.92$	$10.81$
FEB 2012	$5.33$	$4.32$	$5.34$	AUG 2010	$-4.22$	$-4.51$	$-4.72$
JAN 2012	$6.45$	$4.48$	$6.31$	JUL 2010	$6.02$	$7.01$	$6.73$
DEC 2011	$0.43$	$1.02$	$-1.14$	JUN 2010	$-3.92$	$-5.23$	$-5.62$

Find the mean monthly return for the Large Growth funds. Convert this value to the annual return.

advanced math

Use the following table for the following table, which lists expenditures (in billions of dollars with the exception of Parks and Recreation, which is in millions of dollars) for a random sample of seven states. Find the range and standard deviation among the seven states for each category of government expenditure.

	State
Type of Expenditure	GA	IL	LA	MI	NH	OH	PA
Education	24.9	34.8	12.0	29.1	$3.6$	$32.8$	$35.1$
Public Welfare	9.7	17.8	6.4	12.9	2.0	18.4	24.5
Hospitals	5.1	2.6	4.6	3.5	0.1	4.0	3.0
Health	2.0	3.1	0.9	3.8	0.1	3.9	3.8
Highways	3.4	8.2	2.9	3.7	0.7	4.8	8.6
Police Protection	2.2	4.6	1.4	2.4	0.3	3.3	3.1
Fire Protection	1.0	2.3	0.6	2.3	0.2	1.8	0.7
Parks and Recreation	964	2552	709	725	107	1226	1194

Education

advanced math
Find the mean for the following data set. Round to the nearest tenth.

Earthquakes on the Richter scale:

3.5, 4.2, 5.8, 6.3, 7.1, 2.8, 3.7, 4.2, 4.2, 5.7

advanced math

The data for the following exercise consist of a random sample of 40 companies that were part of the S&P 500 and information was current as of May 24, 2013. For each variable,

(a) group the data as indicated;

(b) prepare a frequency distribution with columns for intervals and frequencies;

The variable is earnings per share. Use 6 intervals, starting with -5.00 to -.01, 0 to 4.99, etc.

3.72	1.12	1.43	23.48	8.48	1.3	0.87	13.32	5.47
1.22	1.64	0.65	4.57	2.55	0.98	0.89	-0.24	2.94	0.35
2.54	3.44	3.04	4.99	0.29	2.81	1.58	6.06	3.15	2.67
3.48	1.58	5.66	3.16	3.75	-0.41	6.58	2.52	5.06	0.97

Year	Revenue
2003	4075.5
2004	5294.3
2005	6369.3
2006	7786.9
2007	9411.5
2008	10,383.0
2009	9775.0
2010	10,707.0
2011	11,700.0
2012	13,300.0

Stem	Leaves
0	223449
1	03455567
2
3	6
4	6
5	679
6
7	4

1/4

Stem	Leaves
2	7
3
3
4	01
4	899
5	4
5	5
6	122
6	58
7	00124
7	9
8	0044
8	5679
9	00223334
9	5788

advanced math

For the following exercise, use the following table, which gives the monthly returns for the Janus Growth and Income S Fund, the S&P 500, and the sector returns for large growth funds.

Month	Janus	S&P	Large Growth	Month	Janus	S&P	Large Growth
MAY 2013	$1.33$	$2.34$	$2.63$	NOV 2011	$-0.8$	$-0.22$	$-1.06$
APR 2013	$3.01$	$1.93$	$1.25$	OCT 2011	$14.17$	$10.93$	$11.78$
MAR 2013	$4.26$	$3.75$	$3.19$	SEP 2011	$-10.38$	$-7.03$	$-8.45$
FEB 2013	$1.54$	$1.36$	$0.65$	AUG 2011	$-7.94$	$-5.43$	$-6.67$
JAN 2013	$4.8$	$5.18$	$4.75$	JUL 2011	$-2.81$	$-2.03$	$-1.27$
DEC 2012	$1.8$	$0.91$	$0.52$	JUN 2011	$-1.21$	$-1.67$	$-1.5$
NOV 2012	$0.56$	$0.58$	$1.95$	MAY 2011	$-1.07$	$-1.13$	$-1.27$
OCT 2012	$-1.87$	$-1.85$	$-3.01$	APR 2011	$3.67$	$2.96$	$2.91$
SEP 2012	$1.84$	$2.58$	$2.3$	MAR 2011	$-0.24$	$0.04$	$0.37$
AUG 2012 12	$2.77$	$2.25$	$3.27$	FEB 2011	4	$3.43$	$3.27$
JUL 2012	$2.11$	$1.39$	$0.47$	JAN 2011	$2.38$	$2.37$	$1.83$
JUN 2012	$2.8$	$4.12$	$2.6$	DEC 2010	$4.93$	$6.68$	$5.54$
MAY 2012	$-7.19$	$-6.01$	$-7.37$	NOV 2010	$-1.18$	$0.01$	$1.08$
APR 2012	$-0.94$	$-0.63$	$-0.7$	OCT 2010	$3.65$	$3.8$	$4.62$
MAR 2012	$2.32$	$3.29$	$3.37$	SEP 2010	$9.31$	$8.92$	$10.81$
FEB 2012	$5.33$	$4.32$	$5.34$	AUG 2010	$-4.22$	$-4.51$	$-4.72$
JAN 2012	$6.45$	$4.48$	$6.31$	JUL 2010	$6.02$	$7.01$	$6.73$
DEC 2011	$0.43$	$1.02$	$-1.14$	JUN 2010	$-3.92$	$-5.23$	$-5.62$

Find the mean monthly return for the Large Growth funds. Convert this value to the annual return.

advanced math

	State
Type of Expenditure	GA	IL	LA	MI	NH	OH	PA
Education	24.9	34.8	12.0	29.1	$3.6$	$32.8$	$35.1$
Public Welfare	9.7	17.8	6.4	12.9	2.0	18.4	24.5
Hospitals	5.1	2.6	4.6	3.5	0.1	4.0	3.0
Health	2.0	3.1	0.9	3.8	0.1	3.9	3.8
Highways	3.4	8.2	2.9	3.7	0.7	4.8	8.6
Police Protection	2.2	4.6	1.4	2.4	0.3	3.3	3.1
Fire Protection	1.0	2.3	0.6	2.3	0.2	1.8	0.7
Parks and Recreation	964	2552	709	725	107	1226	1194

Education

advanced math
Find the mean for the following data set. Round to the nearest tenth.

Earthquakes on the Richter scale:

3.5, 4.2, 5.8, 6.3, 7.1, 2.8, 3.7, 4.2, 4.2, 5.7

advanced math

The data for the following exercise consist of a random sample of 40 companies that were part of the S&P 500 and information was current as of May 24, 2013. For each variable,

(a) group the data as indicated;

(b) prepare a frequency distribution with columns for intervals and frequencies;

The variable is earnings per share. Use 6 intervals, starting with -5.00 to -.01, 0 to 4.99, etc.

3.72	1.12	1.43	23.48	8.48	1.3	0.87	13.32	5.47
1.22	1.64	0.65	4.57	2.55	0.98	0.89	-0.24	2.94	0.35
2.54	3.44	3.04	4.99	0.29	2.81	1.58	6.06	3.15	2.67
3.48	1.58	5.66	3.16	3.75	-0.41	6.58	2.52	5.06	0.97

Year	Revenue
2003	4075.5
2004	5294.3
2005	6369.3
2006	7786.9
2007	9411.5
2008	10,383.0
2009	9775.0
2010	10,707.0
2011	11,700.0
2012	13,300.0

Stem	Leaves
0	223449
1	03455567
2
3	6
4	6
5	679
6
7	4

1/7

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