A researcher conducted a test to learn the effect of lead levels in human bodies. He collected the IQ scores for a random sample of subjects with low lead levels in their blood and another random sample of subjects with high lead levels in their blood. The summary of finding is listed below. Use a 0.05 significance level to test the claim that the mean IQ score of people with low lead levels is higher than the mean IQ score of people with high lead levels.

We do not know the values of the population standard deviations.

I would like to know how to Calculate this in Excel.

Calculate the critical value, the test statistic, and p-value.

Make a decision about the null hypothesis and explain your reasoning, then make a conclusion about the claim in nontechnical terms.

Write the hypotheses in symbolic form, determine if the test is right-tailed, left-tailed, or two tailed and explain why.

Ethics are moral standards that govern human conduct and the relationship among them and is very relevant to marketing activities. Discuss the four (4) interrelated concepts of Islamic ethics that should be observed by marketers who provide Islamic financial products and services to ensure that the activities carried out are in line with Maqasid al- Shariáh. Please support your answer by providing the relevant Quranic verse or Hadith.

Question 11

Which of the following is a trace element in the human body?

Question 12

Which of the following statements regarding matter is false?

Question 13

Which of the following statements best describes a compound?

Question 14

In the equation 2 H2 + O2 ? 2 H2O,

Question 15

Which of the following particles are found in the nucleus of an atom?

Question 16

Which of the following best describes the atomic number of an atom?

Question 17

Typically, nitrogen atoms are composed of electrons, protons, and neutrons. An isotope of nitrogen could

Question 18

When full, the innermost electron shell of argon contains ________ electrons, and the outermost shell contains ________ electrons.

Question 19

A(n) ________ forms when two atoms share electrons.

Question 20

A hydrogen atom has one electron. How many covalent bonds can hydrogen form?

There are different perspectives on human population growth and the dynamics associated with population change. Go to CIA World Factbook website and one developing country and compare the following and answer the questions:

Example of a developed country: China

• Population growth rate: 0.32 percent year 2020 estimation, rank 170 in the whole world
• Birth rate: 11.6 births per 1000 people 2020 estimation, rank 168 in the whole world
• Death rate: 8.2 deaths per 1000 people 2020 estimation, rank 85 in the whole world
• Net migration rate: 0.4 migrant (s) per 1000 people 2020 estimation, rank 123 in the whole world

Example of a developing country: Sudan

• Population growth rate: 2.69 percent year 2020 estimation, rank 17 in the whole world
• Birth rate: 33.8 births per 1000 people 2020 estimation, rank 23 in the whole world
• Death rate: 6.5 deaths per 1000 people 2020 estimation, rank 144 in the whole world
• Net migration rate: 0.4 migrant (s) per 1000 people 2020 estimation, rank 125 in the whole world

Please help me answer the following questions with the information I have provided above.

1.      Why do you think the population is increasing or decreasing for that country? Try to explain at least two reasons as to why this is happening?

2.      How do diseases affect the population? Can you think about any diseases that have affected the human population? (Please use peer reviewed sources to support your answer).

3.      Looking at the countries you compared, what are the toxins present in the environment that impact human health? Provide one example for each country.

A nonscientist friend of yours asks how findings in a wormorfly can be relevant to human biology. Explain to your friend the importance of model organisms in molecular biology research.

1. Compare and contast one-dimensional SDS-PAGE and two-dimensional gel electrophoresis of proteins.

2. You have purified a protein. When you subject it to SDS-PAGE, two bands are seen. Provide a possible explanation and describe how you could test your hypothesis.

3. Compare and contrast the steps in production of polyclonal and monoclonal antibodies.

4. A chromatographic column in which oligo-dT is linked to an inert substance is useful in separating eukaryotic mRNA from other RNA molecules. On what principle does this column operate?

5. You plan to use the polymerase chain reaction to amplify part of the DNA sequence shown below, using oligonucleotide primers that are hexamers matching the regions shown in red. (In practice, hexamers are too short for most purposes). State the sequence of the primer oligonucleotides that should be used, including their polarity (5?3?), and give the sequence of the DNA molecule that results from amplification.

5?-TAGGCATGCAATGGTAATTTTTCAGGAACCAGGGCCCTTAAGCCGTAGGCAT-3? 3?-ATCGGTACGTTACCATTAAAAACTCCTTGGTCCCGGGAATTCGGCATCGGTA-5?

6. Complete the incomplete diagrams below to show the key structural difference between an NTP, dNTP, and ddNTP (e.g., CTP, dCTP, ddCTP).

What do “d” and “dd” stand for?

Explain why ddNTPs are called "chain terminators" in DNA sequencing reactions.

The human resources department of a consulting firm gives a standard creativity test to a randomly selected group of new hires every year. This year, 80 new hires took the test and scored a mean of 112.9 points with a standard deviation of 13.8. Last year, 60 new hires took the test and scored a mean of 117.1 points with a standard deviation of . 15.3 Assume that the population standard deviations of the test scores of all new hires in the current year and the test scores of all new hires last year can be estimated by the sample standard deviations, as the samples used were quite large. Construct a 95% confidence interval for µ1-µ2 , the difference between the mean test score µ1 of new hires from the current year and the mean test score µ2 of new hires from last year. Then complete the table below.

Carry your intermediate computations to at least three decimal places. Round your answers to at least two decimal places.

1) Because of the mass involved in constructing and transporting a lander, the first human expedition to Mars will likely be an orbital mission. A geosynchronous orbit seems plausible, allowing astronauts in the spacecraft to have continuous line-of-sight control of rovers on the surface. What is the altitude above the surface of Mars for geosynchronous orbit? You’ll need to do some research to find the mass of Mars and its rotation period.

2) Using the expression for the escape velocity from a planet.
a) Describe the physics that went into your derivation of the escape velocity and list the formula again.
b) Use this formula to calculate the escape velocity of Mars and compare it with Earth. List the sources where you obtained the properties of each planet for your calculation.
c) What insight might you glean from the above calculation on why Mars has a thinner atmosphere than the Earth?

3) Assuming that the outer planets (Saturn, Uranus, and Neptune) are in equilibrium with the solar radiation, calculate the effective surface temperature of these 3 planets and show all intermediate steps. You can assume albedos of 0.5, 0.6, and 0.6, for Saturn, Uranus, and Neptune, respectively. The solar luminosity is 3.83 x 1026 W. How do these temperatures compare with their observed temperatures?

1. (Use Table V for this problem.) The length of human pregnancies varies according to a distribution which is approximately normal with mean 266 days and standard deviation 16 days.

(a) What percent of pregnancies last less than 240 days (about 8 months)?

(b) What percent of pregnancies last more than 270 days (about 9 months)?

(c) What percent of pregnancies last between 240 days and 270 days (about 8 to 9 months)?

(d) What is the cutoff separating the longest 20% of the pregnancies from the other 80%?

(e) What is the cutoff separating the shortest 30% of the pregnancies from the other 70%?

(f) What interval contains the middle 90% of pregnancy lengths?