in populations that are different from others. I would like to figure a sample of 10 with a mean of 44
23,945 results
Chem
A 25.0 mL aliquot of a wellshaken and filtered sample of river is pipetted into an evaporating dish. The sample was heated to dryness. Assume the density of the river water was 1.01g/mL. The following data were collected for Trial 1. Complete the data.

Math
Based on the information given for each of the following studies, decide whether to reject the null hypothesis. For each, give (a) the Zscore cutoff (or cutoffs) on the comparison distribution at which the null hypothesis should be rejected, (b) the Z

Statistics
A researcher is studying the effects of caffeine on exam scores of college students. In this study: What would be the population and sample of this research? Extrapolate your views of the advantages and disadvantages of samples and populations to this

prealgebra
Figure B is the image of Figure A. Which description explains how Figure A was transformed to create figure B. A. Figure A was Reflected across a horizontal line of reflection to create Figure B. B. Figure A was rotated 180 ° about the point in the middle

Science
Studies indicate that fertilizers from nearby farm fields have entered a lake. Which of the following describes a likely change in this ecosystem in the future? A.Algae populations will increase and trout populations will decrease.* B.Algae populations

7th grade science
Hatchery fish populations often have less genetic biodiversity than wild populations. How much lowered biodiversity affect a fish population's ability to adapt to environmental disasters such as the pollution disaster described in this simulation(factory

Social Studies
China and India share a distinction regarding their populations. What is it? a. Approximately twothirds of their populations live in urban areas b. Both populations have grown to more that one billion people c. About 20 percent of their population are

algebra
hi! i need some help with Lesson 9: Polynomials and Factoring Unit Test. A biologist studied the populations of common guppies and Endler's guppies over a 6year period. The biologist modeled the populations in tens of thousands where 'x' is time, in

statistic
Two samples each of size 25 are taken from independent populations assumed to be normally distributed with equal variances. The first sample has a mean of 35.5 and standard deviation of 3.0 while the second sample has a mean of 33.0 and standard deviation

statistics
Select the TWO options that are TRUE statements about twosample ttests. Select one or more: The same formula is used for the ESE (estimated standard error) in the twosample ttest with a common variance and the twosample ttest with unequal variances.

chemistry
No precipitate formed when an aqueous solution of NaCl or Na2SO4 was added to the sample solution. A precipitate formed when the sample solution was made basic with NaOH. Which ion(s) are present in the sample soluiton? [Hg2]2+ [Ba]2+ [Mn]2+ I know that

Science
Darwin based his theory of evolution by natural selection on his observations of the a. genotypes of individuals. b. phenotypes of individuals. c. genotypes of populations. d. phenotypes of populations. Is this a or d?

Statistics
Data below corresponds to sample weights of two different types (A and B) of Tuna. We want to test at significance level = .05 if the two tuna populations from which the samples come have the same variance. A .99 1.92 1.23 .85 .65 .69 .6 .53 1.41 1.12 .63

Statistics
The null and alternate hypotheses are: H0: μ1 = μ2 H1: μ1 ≠ μ2 A random sample of 15 items from the first population showed a mean of 50 and a standard deviation of 5. A sample of 12 items for the second population showed a mean of 46 and a standard

CHEM
The following data were collected for determining the concentration of suspended solids in a water sample. (D= 1.01 g/mL). Express all calculated data with the correct number of significant figures. Volume of sample (mL): Trial 1: 25.0 trial 2: 20.0 trial

Algebra 1
Can you please check my work? A city planning committee surveys 100 people waiting at a bus stop about the expansion of the public transportation system. Is this an example of a: random sample, systematic sample, selfselected sample, convenience sample,

Behavioral Statistics
I need someone to explain HOW to do this..I don't want just the answer I have got to figure out how to do this before my midterm, and I'm completely clueless! 3. One of the major U.S. tire makers wishes to review its warranty for their rainmaker tire. The

math
Independent random samples, each containing 800 observations, were selected from two binomial populations. The samples from populations 1 and 2 produced 320 and 400 successes, respectively. Construct a 90% confidence interval for the true difference in

Statistics
This is the first question..... For a population that has a standard deviation of 10, figure the standard deviation of the distribution of means for samples of size (b) 3. This is the second question....For each of the following samples that were given an

statistic
. For each of the following, assume that the two samples are selected from populations with equal means and calculate how much difference should be expected, on average, between the two sample means. a. Each sample has n _ 5 scores with s2 _ 38 for the

Science
Hunting lions has been banned in some parts of Africa. If this law is enforced, what can we expect to happen to the populations of small mammals in the same locations? A) The small mammal populations will decrease. ** B) The small mammals will become

Statistics Hypothsis testing
Am I using the 2sample T test or ANOVA? Please show all steps. test the claim that μ1 = μ2 Two samples are randomly selected from normal populations. The sample statistics are n1=11,x(bar)=4.8, s1=.76 n2=18, x(bar)=5.2, s2=.51 Assume that σ1 ≠ σ2 

Statistics
test the claim that μ1 = μ2 Two samples are randomly selected from normal populations. The sample statistics are n1=11,x(bar)=4.8, s1=.76 n2=18, x(bar)=5.2, s2=.51 Assume that σ1 ≠ σ2 Use alpha = .02 I am not sure if this is a 2sample t test or do I

Socials
compare figure 31, a map of France's physical features, with figure 32, a map of France's agricultural products by district. Then comapre both figures with Figure 34, a map that shows the standard of living in various regions of France during the 17th

US History
At the Constitutional Convention, why did Virginia favor a plan by which states with larger populations would have more voting power in Congress than states with smaller populations? Thanks MC

chem
The following state were collected for determining the concentration of suspended solids in a water sample. (D= 1.01 g/mL). Express all calculated data with the correct number of significant figures. Volume of sample (mL): Trial 1: 25.0 trial 2: 20.0 trial

Chemistry
A sample of InCl3, is known to be contaminated with NaCl. The contaminated sample weighs 2.84g. When the contamintaed sample is treated with excess AgNO3(aq). 574 grams of AgCl(s) are obtained. What is the percentage by mass of InCl3 in the sample? (All I

Science
[I'm not to sure. I think it's c.] What group of organisms are most in danger of extinction? a.those with small populations b.those that migrate or need special habitats c.those with large populations that breed quickly d.both (a) and (b) Nuts to c, if the

statistics
I cant figure this out!!! The income of trainees at a local mill are normally distributed with a mean of $1100 and a standard deviation of $150. If a sample of 100 trainees is selected, what is the probability that the sample mean will be less than $1075

Algebra 1
A city planning committee surveys 100 people waiting at a bus stop about the expansion of the public transportation system. Is this an example of a: random sample, systematic sample, selfselected sample, convenience sample, bipartisan sample, or

Chemistry
I need help with this lab. Write the equation for the decomposition of the hydrate, CuSO4*XH2O. Mass of crucible and hydrate: 93.000g Mass of crucible and pure salt: 91.196g I need to calculate the following: 1. mass of water in hydrate sample(g) 2. number

Statistics
in populations that are different from others. I would like to figure a sample of 10 with a mean of 44

statistics ***pls help!
for each of the following, assume the 2 samples are selected from populations with equal means and calculate how much difference should be expected, on average, between the 2 sample means. a)each sample has n = 5 scores with s^2 = 38 for the first sample,

math
two sample of size 8 and 10 are drawn from two normally distributed populations having variances 20 and 36, respectively. find the probability that the variance of the first sample is more than twice the variance of the second sample.

statistics
For each of the following samples that were given an experimental treatment, test whether they represent populations that score significantly higher than the general population: (a) a smaple of 100 with a mean of 82, (b) a sample of 10 with a mean of 84.

American Government
Over time, what has been the trend of rural vs. urban population in the United States? a. The rural populations have developed extensive farmland to continue being essential. b. The rural populations have increased, and the urban populations have

MATH STATS
For each of the following samples that were given an experimental treatment, test whether these samples represent populations that are different from the general population: (a) a sample of 10 with a mean of 44, (b) a sample of 1 with a mean of 48. The

Science
Hunting lions has been banned in some parts of Africa. If this law is enforced, what can we expect to happen to the populations of small mammals in the same locations? A) The small mammal populations will decrease. B) The small mammals will become extinct

statistik and probability
Two samples of sizes 8 and 10 are drawn from two normally distributed populations having variances 21.8 and 36, respectively. Find the probability that the variance of the first sample is more than twice the variance of the second sample. Interpret its

statistics
A researcher wants to determine if two brands of cigarettes contain the same amount of nicotine. The data is shown in the table. With a significance level of 0.05 to that conclusion can be reached. Set the interval for a confidence of 95% Sample A: 40.3

statistics
A researcher wants to determine if two brands of cigarettes contain the same amount of nicotine. The data is shown in the table. With a significance level of 0.05 to that conclusion can be reached. Set the interval for a confidence of 95% Sample A: 40.3

Bio
Succession involves one community replacing another. What must be true of each community that appers? A. the population are adapted to their environment B. the populations get larger as the next community is established C.the populations contain very

Stats multiple choice ?
If we are told that statistical significance has been achieved, what does that allow us to infer? A. That the differences seen in the samples can be generalized to the population that the sample represents. B. That the measures used are valid and reliable.

statistics
1.test wheter these samples represent populations that are different from the general population sample of 10 with a mean of 44 and sample of 1 with a mean of 48. 2. The general population of individuals has a mean of 40 , a deviation of 6, and follows a

statistics
Select the TWO options that are TRUE statements about twosample ttests. Select one or more: The same formula is used for the ESE (estimated standard error) in the twosample ttest with a common variance and the twosample ttest with unequal variances.

statistics
For each of the following samples that were given an experimental treatment, test whether these samples represent populations that are different from the general population: (a) a sample of 10 with a mean of 44, (b) a sample of 1 with a mean of 48. The

Statistics
For each of the following samples that were given an experimental treatment, test whether these samples represent populations that are different from the general population: (a) a sample of 10 with a mean of 44, (b) a sample of 1 with a mean of 48. The

Statistics
For each of the following samples that were given an experimental treatment, test whether these samples represent populations that are different from the general population: (a) a sample of 10 with a mean of 44, (b) a sample of 1 with a mean of 48. The

Statistics
For each of the following samples that were given an experimental treatment, test whether these samples represent populations that are different from the general population: A. a sample of 10 with a mean of 44. B.a sample of 1 with a mean of 48. The

statistics
For each of the following samples that were given an experimental treatment, test whether these samples represent populations that are different from the general population: (a) a sample of 10 with a mean of 44, (b) a sample of 1 with a mean of 48. The

statistics
For each of the following samples that were given an experimental treatment, test whether these samples represent populations that are different from the general population: (a) a sample of 10 with a mean of 44, (b) a sample of 1 with a mean of 48. The

statistics
For each of the following samples that were given an experimental treatment, test whether these samples represent populations that are different from the general population: (a) a sample of 10 with a mean of 44, (b) a sample of 1 with a mean of 48. The

psy325
For each of the following samples that were given an experimental treatment, test whether these samples represent populations that are different from the general population: (a) a sample of 10 with a mean of 44, (b) a sample of 1 with a mean of 48. The

Statistics
: For each of the following samples that were given an experimental treatment, test whether these samples represent populations that are different from the general population: (a) a sample of 10 with a mean of 44, (b) a sample of 1 with a mean of 48. The

statistics
For each of the following samples that were given an experimental treatment, test whether these samples represent populations that are different from the general population: (a) a sample of 10 with a mean of 44, (b) a sample of 1 with a mean of 48. The

statistics
For each of the following samples that were given an experimental treatment, test whether these samples represent populations that are different from the general population (a) a sample of 10 with a mean of 44, (b) a sample of 1 with a mean of 48. The

science
In general, populations have the ability to increase exponentially, but why do you think that most populations are fairly constant in size?

History
What advantages did Europeans have over the indigenous populations of Mesoamerica and South America? And describe the impact they had on those populations.?

statistics
if we are testing for the difference between two populations, it is assumed that the two populations are approximately normal and have equal variances, true or false

biology
How does antibiotic resistance appear to develop within a bacterial populations? What are the health implications for human populations that increase the use of antibacterial soaps

Psychology/Statistics
For each of the following samples that were given an experimental treatment test whether these samples represent populations that are different from the general population (a) a sample of 10 with a mean of 44, (b) a sample of 1 with a mean of 48. The

biochem
Two samples of doublestranded DNA have been prepared. Nucleotide analysis reveals that sample 1 is found to be 21% A, while sample 2 is 26% G. Knowing this, which of the following statements is true? Sample 1 has a higher AT content than Sample 2. Sample

government
Which states would have given the strongest approval of Article I, Section 2 of the United States Constitution? A. states with large populations, slave or free B. new states added to the United States later on C. states with small populations but large

math
alt="Two rectangles are shown . One rectangle has sides of 3 cm, 7 cm, 3 cm and 7 cm. The adjacent rectangle has sides of 3 cm, 7 cm, 3 cm and 7 cm. Label at bottom "Sample"."/> Is the figure on the right congruent to the sample figure? Explain

qnt/351
Which of the following statements about the two sample sizes is NOT true? Assume thepopulation standard deviations are equal A. Sample A = 11; sample B = 13 B. Sample A = 12; sample B = 14 C. Sample A = 13; sample B = 13 D. Sample A = 10; sample B = 16

cultural diversity
Which is a goal of multicultural education for students who are affected by racism? A. To develop a thick skin B. To develop a positive selfconcept C. To develop selfcontrol D. To develop perseverance 2. In general, changes in selfreporting on US Census

ecology
after spraying crops with ddt for several years, farmers found that populations of insect pests rebounded. one reason was that the insects had developed resistance to the insecticide. suggest populations, pyramids, predators and competitors

Essentials of statistics
A populations of scores forms a normal distribution with a mean of 40 and a standard deviation of 12 what is the probability of selecting a sample of n=9 scores with a mean less than m=34

science
1.a population of snails on an island is disrupted during a violent storm. portions of the population are carried by the storm surge to two new islands, while a portion remains on the original island creating three separate populations. conditions on one

U.S. History
Electoral Vote in 1792: At the Constitutional Convention, why did Virginia favor a plan by which states with larger populations would have more voting power in Congress than states with smaller populations?

Anthropology
Suppose two populations come into contact. As organisms will do, they find some attractive members of the opposite sex and interbreed. The populations have now exchanged genes. The next generation produces several children with new traits. What

Chemistry
A 10.0 mL aliquot of a flouride sample solution was diluted to 250 mL in a volumetric flask. The F concentration of this DILUTED sample was determined with a F ion selective electrode and found to be 7.1 mg/L. What is the concentration of F in the

Chem
The following state were collected for determining the concentration of suspended solids in a water sample. (D= 1.01 g/mL). Express all calculated data with the correct number of significant figures. Volume of sample (mL): Trial 1: 25.0 trial 2: 20.0 trial

Science  Biology
After spraying crops with DDT for several years, farmers found that populations of insect pests rebounded. One reason was that the insects had developed resistance to the insecticide. Suggest another reason, based on what you know about populations,

science
after spraying crops with ddt for several years, farmers found that populations of insect pests rebounded. one reason was that insects had developed resistance to the insecticide. suggest another reason, based on what you know about populations, pyramids,

Stats
I just need help with starting how to calculate the problem I am so lost. A random sample of eight observations from the first population resulted in a standard deviation of 10. A random sample of six observations from the second population resulted in a

statistics
Suppose we take a random sample of size n from a normal population with variance, σ2 . It can be shown that (n−1)s2/σ2 has a chisquare distribution with n−1 degrees of freedom, where s is the sample variance. Below is a random sample of size 8 drawn

DataManagement
Suppose that the populations of the three species are distributed as shown in the following table. You capture a frog, note its gender and species, and then release it. This process is repeated until you have captured and recorded 50 frogs. Species

Data Management
Suppose that the populations of the three species are distributed as shown in the following table. You capture a frog, note its gender and species, and then release it. This process is repeated until you have captured and recorded 50 frogs. Species

statistics
A test of writing ability is given to a random sample of students before and after they completed a formal writing course. The results are given below. Construct a 99% confidence interval for the mean difference between the before and after scores. You may

statistics
A test of writing ability is given to a random sample of students before and after they completed a formal writing course. The results are given below. Construct a 99% confidence interval for the mean difference between the before and after scores. You may

statistics
Among the four northwestern states, Washington has 51% of the total population, Oregon has 30%, Idaho has 11%, and Montana has 8%. A market researcher selects a sample of 1000 subjects, with 450 in Washington, 340 in Oregon, 150 in Idaho, and 60 in

History
What areas of the world do you believe have growing/ expanding populations? What areas of the world do you believe have decliing/decreasing populations? Is there a good website to get this info?

Biology 30
In what size populations might you expect it to be relatively common for alleles to become fixed? Why? I think that larger populations would be more likely to have fixed alleles, since perfect HardyWeinberg equilibrium states that there will be no change

Environmental Science
#35. In two or three welldeveloped paragraphs, list the populations that are affected by ultriviolet light and identify the effects on each of these populations. my answer: There are four major populations that are affected by ultraviolet light. These

Ecology
After spraying crops with DDT for several years, farmers found that populations of insect pests reboundED. One reason was that insects had developed resistance to the insecticide. Suggest another reason, based on what you know about populations, pyramids,

statistic
A random sample of 20 customers who drive luxury cars showed that their average distance driven between oil changes was 3187 miles with a sample standard deviation of 42.50 miles. Another sample of 10 customers who drive compact lowerprice cars resulted

Bio
Hi there, could you please help me with the following questions: 1.) How does the HardyWeinberg provide a baseline for identifying how populations evolve, as a function of changes in their allele frequencies? 2.) Grey squirrels are predominate since they

college geology help please
I was the same person from yesterday. I need help on a question. I don't type very good so I have one of my host family do it for me. so please help us. Suppose you have a sample of clamshell at a Paleoindian site and you measure the 14C activity of a

statistics psy/315
Based on the information given for each of the following studies, decide whether to reject the null hypothesis.For each, give (a) the Zscore cutoff (or cutoffs) on the comparison distribution at which the null hypothesis should be rejected(b) the Z score

Chemistry
Given 175 liters of SO3 at 800 torr and 100 degrees C, find the volume at STP, give the mass of the sample and give the number of molecules in the sample. Can somebody please explain how I figure this out? I'm so lost. :{

Science
Can you please help me answer just a couple questions A species of flowering plant produces vibrant blue flowers. The flowers attract both pollinators that spread the plant's pollen and herbivores that feed on the plant. An adaptation occurred through

Chemistry
I don't know exactly how to start this question: A sample gas contains 2.95 x 10e24 molecules. The sample is 21.0% oxygen. Calculate volume of oxygen in liters assuming oxygen has a density of 1.308 g/L. Please help me how to do this. I have been stuck and

SchoolCraft
A gas sample undergoes a reversible isothermal expansion. The figure gives the change ΔS in entropy of the gas versus the final volume Vf of the gas. The scale of the vertical axis is set by ΔSs = 68.4 J/K. How many moles are in the sample?

statistics
do all populations micheline tires, voters, people with high blood pressue... produce a normal curve? True or False Is this false because all samples produce normal curves and not the populations, and don't you have to have a range of values and

Human and Social Biology
A calorimeter was used to oxidise completely 2g of a food sample,causing a temperature rise of 5degrees C in 100cm3 of water(this figure includes the water equivalent of the apparatus). How much energy was present in the food sample(in joule per g)?

algebra 1
Circle the most appropriate description. 27.A city planning commitee surveys 100 people waiting at a bus stop about the expansion of the public transportation system. Random Sample,systematic sample,selfselected sample, convenience sample, bipartisan

Stats 330 HELP
I need some help on this question it has two parts but i can't figure it out. Can someone help me. The NDSU library checks out an average of 320 books per day, with a standard deviation of 75 books. Suppose a simple random sample of 30 days is selected for

Statistics
. A random sample is selected from a normal population with a mean of __40 and a standard deviation of __10. After a treatment is administered to the individuals in the sample, the sample mean is found to be M _ 42. a. How large a sample is necessary for

Probabilty & Statistic
A random sample is selected from a normal population with a mean of __40 and a standard deviation of __10. After a treatment is administered to the individuals in the sample, the sample mean is found to be M _ 42. a. How large a sample is necessary for