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There are many situations where it is of interest to compare two groups with respect to their mean scores on a continuous outcome. For example, we might be interested in COMPARING mean systolic blood pressure in men and women, or perhaps compare body mass index (BMI) in smokers and non-smokers. Both of these situations involve comparisons between two independent groupsThe confidence interval will be computed using either the Z or t distribution for the selected confidence level and the STANDARD error of the point estimate. The use of Z or t again depends on whether the sample sizes are large (n1> 30 and n2 > 30) or small. The standard error of the point estimate will incorporate the variability in the outcome of interest in each of the comparison groups. If we assume equal variances between groups, we can POOL the information on variability (sample variances) to generate an estimate of the population variability. THEREFORE, the standard error (SE) of the difference in sample means is the pooled estimate of the common standard deviation (Sp) (assuming that the variances in the populations are similar) computed as the weighted average of the standard deviations in theFor both large and small samples Sp is the pooled estimate of the common standard deviation (assuming that the variances in the populations are similar) computed as the weighted average of the standard deviations in the samples.

The table below summarizes data n=3539 participants attending the 7th examination of the Offspring cohort in the Framingham Heart Study. 

 

Men

Women

Characteristic

N



s

n



s

Systolic Blood Pressure

1,623

128.2

17.5

1,911

126.5

20.1

Diastolic Blood Pressure

1,622

75.6

9.8

1,910

72.6

9.7

Total Serum Cholesterol

1,544

192.4

35.2

1,766

207.1

36.7

Weight

1,612

194.0

33.8

1,894

157.7

34.6

Height

1,545

68.9

2.7

1,781

63.4

2.5

Body Mass Index

1,545

28.8

4.6

1,781

27.6

5.9

Suppose we want to calculate the difference in mean systolic blood pressures between men and women, and we also want the 95% confidence interval for the difference in means. The sample is large (> 30 for both men and women), so we can use the confidence interval FORMULA with Z. Next, we will check the assumption of equality of population variances. The ratio of the sample variances is 17.52/20.12 = 0.76, which falls between 0.5 and 2, suggesting that the assumption of equality of population variances is reasonable.

First, we need to compute Sp, the pooled estimate of the common standard deviation.



Substituting we get



which simplifies to



Notice that for this example Sp, the pooled estimate of the common standard deviation, is 19, and this falls in between the standard deviations in the comparison groups (i.e., 17.5 and 20.1). Next we substitute the Z score for 95% confidence, Sp=19, the sample means, and the sample sizes into the equation for the confidence interval.

● CONTINENTAL PLATEAU :-
◆ They are on the continental crust portion.
◆ Lower part (or the base part) composed of SOLID layers.
◆ Interplate tectonics result in the formation of such plateaus.

● VOLCANIC PLATEAU :-
◆ They can occur anywhere except the regions of erosion (deflation, abrasion, etc.)
◆ Lower part (or the base part) do not composed of any layers.
◆ Volcanic ERUPTION leading to the formation of LAVA sheets when gets solidified b, volcanic plateaus are formed.

Deep ocean trenches, volcanoes, island arcs, submarine mountain ranges, and fault LINES are examples of features that can form along plate tectonic boundaries. Superheated MOLTEN lava, about 2,200 DEGREES Fahrenheit, is about to explode into the water at the West MATA volcano along the Pacific Ring of FIRE.

Topic of CANCER passes through Gujarat Rajasthan chattisgarh Madhya Pradesh JHARKHAND west BENGAL MIZORAM and tripura

hy friend

The ITEMS that you take with you for a field visit

...........................................................................................................................................

⇒A notepad and a PEN to take down notes of what you observed.

⇒A camera to take pictures of all that you were shown.

⇒A pair of BINOCULARS to SEE things located far away.

⇒A cap or a hat if your field TRIP is likely to be outdoors for most art of the day.

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Nearly there are 24.6 crore who wrk in agriculture sector EVEN though we define it as a primary sector BT here we FOUND unemployment rate the most bcz agricultural depends on many factors n takes time even though we give slogan jai kisan in real fact most suicidal rate was found in this sector as government don't STAY on its words as loans are been provided bt it wasn't reach to each n EVERY one. Even they keep there full energy in this they face lose n many reasons why it's called as unorganised one

By letting SUN's RAYS come inside bu not ESCAPE just the way greenhouse do.

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Majuli was the largest RIVERINE ISLAND in the world . It is SITUATED on the Brahamputra RIVER

1. soil erosion - soil erosion is the displacement of the upper layer of soil
2. land degradation - it is the process in which the value of the biophysical environment is affected by the combination of human induced processes acting upon the land
3. cultivated land resource- a land capable to be ploughed and used to grow crops
4. Gully erosion - gully erosion is the REMOVAL of soil along DRAINAGE lines by surface water runoff
5.renewable resource- it is a substance of economic value that can be replaced or REPLENISHED in the same or less amount of time as it is to DRAW the supply down.
resource planning- resource planning is the CONTINUOUS ongoing process of systematic planning that identifies current in future human resource needs for an organisation to receive its goals
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The CONCEPT of the WEST, and how this AFFECTS their identity and foreign policy. Brazil' notions about the West are the subject of lively domestic DISCUSSION both in academia and the media, reflecting the struggle the country find themselves in to define their identity as they rise. I argue that the concept of the West serves, in Brazil, as a crucial concept to articulate their own identity—by a complex combination of CRITICIZING, distancing itself from, or attempting to emulate the West.

Boats tend to be constantly in motion, even if it's just a rocking motion. This is because water, especially in big BODIES of water like rivers, have CURRENTS that keep them moving all the time.

Because of this, when rivers appear in literature, they often symbolize, or REPRESENT, movement. This is true for the CONGO River in Heart of Darkness. The Congo SYMBOLIZES movement, and helps the characters and the plot keep going forward. In this novel, the river has other functions as well.

(I ) FALSE. (ii ) TRUE. (iii ) True. (IV ) False. (V) False.

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Water scarcity or water stress occurs when water AVAILABILITY is not enough to MATCH the demand for water. It is CAUSED by an increase in POPULATION, growing demand for water, and UNEQUAL access to it.

Hi frndd,
Here's ur answer :

Udaipur city of Tripura is closest to TROPIC of cancer. Tropic of Cancer is the imaginary LINE at 23.50

^_^

Hope this MAYBE HELPFUL to you..frndd

Hey MATE.....I think the ANSWER is CONTINENTAL DRIFT

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Wall maps are maps designed to be hung UPON the wall of a room and to be read while in that position.

• PERFECT for business and education
• Very interactive and handy
• Much detailed infomation
• Easy to read
• Color codes are very effiecient

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( vi ) GATHERING.
( VII ) Transhumance.
( VIII ) Chile.
( ix ) Irrigation.
( x ) KARNATAKA.

Salanisation of SOIL takes PLACE DUE CHEMICALS PRESENT in rainwater.

ANSWER:

it will be 9:00 AM because when 60 is at 12 NOON then on 30 it will be at 9 by SUBTRACTING -3

Explanation:

Because Canada is the second biggest country on Earth and needs a lot of time ZONES to cover the country. The biggest country on Earth is Russia, which has 11 time zones.

Canada extends from the Pacific Ocean to the Atlantic Ocean. Time zones generally change when the time difference is greater than one HOUR. So Canada’s time zones are Pacific standard time, Mountain standard time, Central standard time, Eastern standard time, Atlantic standard time, and Newfoundland standard time.


I like to CALL the last, “Newfoundland Substandard Time” because it only differs by half an hour from Atlantic standard time. But that’s just me. The island is only half a time zone wide, so the western end should be on Atlantic standard time, but the capital of Saint John’s is half a time zone east, 30 minutes earlier.

However, in SUMMER most provinces advance their clocks by an hour to take advantage of the longer summer days. The main exception is Saskatchewan which is doesn’t change its clocks and so is on the same time zone as Manitoba in winter, and as Alberta in summer. The Peace River area of BC is similar in that it doesn’t change clocks, so it spends the winter on Alberta time and the summer on BC time

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It evetation varies from 100 to 300 above means SEA level.

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The Himalayan mountain RANGE and Tibetan plateau have formed as a result of the collision between the Indian Plate and Eurasian Plate which began 50 million years ago and CONTINUES today. 225 million years ago (Ma) India was a large ISLAND situated off the Australian coast and separated from Asia by the Tethys OCEAN.

Due to external factors LIKE, Sun, Wind, RUNNING Eater, Glacier etc. The surface

Gets weatheredout. If it is a mountain,

This WEATHERED material gets deposited

At the foot of the mountain to form a PLAIN called as, “Pidmount Plain”

e.g. At the foot hills of HIMALAYA, South of Shiva like, such plains are developed.

Because desert sand ABSORB sun LIGHT very fast so it BECOMES very hotter in day time and it also radiates the HOTNESS very fast which MAKES very cold in night time

The HIMALAYAS , or Himalaya
form a MOUNTAIN range in ASIA separating the plains of the INDIAN SUBCONTINENT start from. Tibetan pleatu

Because.................

It DEPENDS on the MANY PHYSICAL FACTORS like

Latitude
Longitude
Terrain

PYROCLASTIC ROCK is the rock

A continent is defined as a large landmass. A Sub Continent can be another large landmass smaller than the continent. A Sub Continent should be slightly different from how the continent is defined and that is why it is called ‘Sub’ Continent. Characteristically, a sub continent is also considered as a part of the continent but APPEARS GEOGRAPHICALLY as a separate land and is also ruled separately. In this context India is a largest landmass which is EXISTING separately along with other countries like Sri Lanka, Pakistan, NEPAL, Bhutan and many more SMALL countries and nearby islands. Hence it is called Indian sub continent.

HEY there........

An EARTHQUAKE is the shaking of the SURFACE of the EARTH, resulting from the sudden release of energy in the Earth's lithosphere that creates seismic waves.

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RUSSIA,USA,Canada,Australia,Mexico,BRAZIL,Indonesia,Kazakhstan,MongoliaThe Republic of the Congo,Kiribati,MICRONESIA,Chile,SpainPortugal and Ecuador.

Kolkata is the commercial and educational center of East India and one of the oldest operating ports in the COUNTRY. In 2014, it has an estimated population of 4.6 MILLION, which makes it the 7th most populous city in India.Kolkata has an estimated population of 4.6 million.
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Punjab, HARYANA and western Uttar pradesh account for about 55percent of LAND under WHEAT cultivation nd PRODUCE about 65per cent of wheat production in India

Tropic of CANCER divide the India into TWO EQUAL HALVES it's degree is 23°30'north

Countries with the LOWEST Percentage of Women in the Population

UNITED Arab Emirates. The COUNTRY with the lowest percentage of women in the world is the United Arab Emirates with only 26.7%. ...Qatar. Second, on the list is Qatar where only 27.4% of the population is female. ...Other MIDDLE EASTERN Countries. ...Bhutan and India.

Orissa.andhrapradesh arunachal PRADESH ETC... are eastern most BORDER of the COUNTRY

BANGALORE is NEITHER a STATE nor a UNION TERRITORY .

France under the Ancien Régime (before the French Revolution) divided SOCIETY into THREE ESTATES: the First Estate (CLERGY); the Second Estate (NOBILITY); and the Third Estate(commoners).

Assuming it to be the PHYSICAL SIZE (land area), BBMP (741 sq. km) is almost double the size of the areaadministered by the Chennai Municipal Corporation (426 sq. km); HOWEVER, theurban agglomeration of Chennai is slightly bigger than that of Bangalore. ... Bangalore is more or less equally spread across all sides.