keepsmiling

I have written a 2 pages paper about evolution of malaria, can someone read and let me know if I have confused sentences or any grammatical errors?

Here is the first sentence:"Malaria is one the most ancient recorded diseases of human kind. That can be find the accounts of Malaria in ancient Chinese literature going back 4 -5 thousands years".

I cannot post all it here online because then it will count as plagiarism :(

That would be wonderfulf if you can to provide me an email.

Thank you for your time.

An auditor for a hardware store chain wished to compare the efficiency of two different auditing techniques. To do this he selected a sample of nine store accounts and applied auditing techniques A and B to each of the nine accounts selected. The number of errors found in each of techniques A and B is listed in the table below:

Errors in A, Errors in B

25 11

28 17

26 19

28 17

32 34

30 25

29 29

20 21

25 30

Select a 90% confidence interval for the true mean difference in the two techniques. Use the appropriate tables in your book.

a) (0.261, 8.627)

b) (-4.183, 4.183)

c) (2.195, 6.693)

d) (3.050, 5.838)

e) (2.584, 6.304)

f) None of the above

Could you please show me the steps? Thank you.

I am writting a research paper for my biochemistry lab and I can not find some one to proofread my whole paper :( so I am here to atleast correct a couple of senteces.

I need stronger words.

"The pictures of the crystals in the figure 2-5 were taken via a phone. Some of wells showed crystal formation and others did not. Since well #1 had no crystal formation then it is not shown. Wells 2,3, and 4 showed signs of crystal formation. However, overall yield was low despite increasing amounts of crystal in each well. Finally, in well # 5 significant amount of crystal growth were observed as showed by the blue dye and those were legitimate crystals of lysozyme. Well # 6 showed even better and more growth. However, it is not shown, the Izit dye also diffused the crystals in well # 6 that indicated the presence of lysozyme crystals. In general, the higher the salt concentration the higher the amounts of crystals were obtained."

Thanks.

I am writting a research paper for my biochemistry lab and I can not find some one to proofread my whole paper :( so I am here to atleast correct a couple of senteces.

I need stronger words.

"From the result, it was observed that greater amounts of crystals were obtained at higher salt concentrations and a lower amount of crystals at lower salt concentration. In order to obtain the ideal amount of crystals it is necessary to use the ideal amount of specific type of salt. "

Thank you.

An April 2009 survey of 2253 American adults conducted by the Pew

Research Center's Internet & American Life Project revealed that 1262 of

the respondents had at some point used wireless means for online access.

Calculate an interpret a 95% CI for the proportion of all American

adults who at the time of the survey had used wireless means for

online access.

Answer = (0.539, 0.581)

I know the answer but how did they get this can some one show me the steps?

Thanks.

The average height of students at UH from an SRS of 18 students gave a standard deviation of 2.7 feet. Construct a 95% confidence interval for the standard deviation of the height of students at UH. Assume normality for the data.

a) (4.026, 7.048)

b) (3.026, 9.048)

c) (2.026, 4.048)

d) (1.026, 8.048)

e) (1.526, 9.048)

I know we have to use the chi-sauared (X^2) but can some one help with it ? Thanks.

Which of the following statements is not true?

a) The larger the sample size, the better will be the normal approximation to the sampling distribution of sample mean.

b) The sampling distribution of the sample mean is always reasonably like the distribution of X, the distribution from which the sample is taken.

c) The standard deviation of the sampling distribution of sample mean = ?/?n

d) The sampling distribution of sample mean is approximately normal, mound-shaped, and symmetric for n > 30 or n = 30

Thanks.

1) If x is normally distributed with a mean of 30 and a standard deviation of 10, find P(30 ≤ x ≤ 47).

answer: 0.455

I did in R studio but got it wrong, how did they get this answer?

2) At a college the scores on the chemistry final exam are approximately normally distributed, with a mean of 79 and a standard deviation of 15. The scores on the calculus final are also approximately normally distributed, with a mean of 79 and a standard deviation of 12. A student scored 80 on the chemistry final and 82 on the calculus final. Relative to the students in each respective class, in which subject did the student do better?

a) There is no basis for comparison

b) The student did equally well in each course

c) Calculus

d) Chemistry

I know it is not chemistry.

Can you show your work in both questions please?

Thanks.

Thanks.

A fish tank in a pet store has 21 fish in it. 9 are orange and 12 are white. Determine the probability that if we select 4 fish from the tank, at least 2 will be white.

a) 0.2114

b) 0.8105

c) 0.5714

d) 1.0305

e) 0.1894

I know how to do if it asks about atleast 1 but here it says 2 so I'm not sure :(

Can someone show me the steps? Thanks.

1) Each year a company selects a number of employees for a management training program. On average, 50 percent of those sent complete the program. Out of the 17 people sent, what is the probability that 11 or more complete the program?

a) 0.0717

b) 0.1661

c) 1.0282

d) 0.8338

I am using R program but for some reason I keep getting a different answer. Can some one help? If u have time can you show me the steps as well.

Thank you.

1) Let X be the number of flaws on the surface of a randomly selected boiler of a certain type and suppose X is a Poisson distributed random variable with parameter μ = 4. Find P(4 ≤ X ≤ 8)?

2) In testing a new drug, researchers found that 5% of all patients using it will have a mild side effect. A random sample of 7 patients using the drug is selected. Find the probability that:

A) None will have this mild side effect.

B) At least one will have this mild side effect.

Can you show me the steps? Thank you.

A furniture store is having a sale on sofas and you're going to buy one. The advertisers know that out of the people who come to the store to buy the sofa that is on sale, every 1 out of 7 will change to a more expensive sofa than the one in the sale advertisement. Let X = price of next sofa sold. What is the expected price of the sofa (E[X]) if the advertised sofa is $150 and the more expensive sofa is $300?

Can you show me the steps? Thanks.

Among 9 electrical components exactly one is known not to function properly. If 4 components are randomly selected, find the probability that at least one does not function properly.

a) 0.5556

b) 0.7023

c) 0.4444

d) 0.8889

e) 0.3333

f) None of the above

Can someone plz show me the steps? Thanks.

The probability that a randomly selected person has high blood pressure (the event H) is P(H) = 0.5 and the probability that a randomly selected person is a runner (the event R) is P(R) = 0.3. The probability that a randomly selected person has high blood pressure and is a runner is 0.2. Select the false statement.

a) P(H ∩ Rc) = 0.3

b) H and R are independent events.

c) P(R ∪ H) = 0.6

d) P(Rc ∪ Hc) = 0.8

e) H and R are not mutually exclusive.

f) None of the above.

I know a,c & d is correct but I'm confused about the rest options can someone give the right answer please?

Thanks.

Let A = {2, 9}, B = {9, 17, 23}, D = {33} and S = sample space = A ∪ B ∪ D. Identify (Ac ∩ Bc)c.

a) {2, 9}

b) {2, 9, 17, 23}

c) {2}

d) {17}

e) {9}

f) None of the above.

I think it should {33} because that is the only member that is not both in A and B. so the last option f) None of the above is correct. Am I right? If not could you please solve it using proper formulas?

Thanks.

The relative frequency for a given class is the total of the frequencies for that class divided by the total number of entries for all classes.

A True

B False

Thanks

If a class in a frequency distribution for a sample of 50 has a frequency of 5, the cumulative relative frequency for this class

a) is 0.10

b) is 0.01

c) is 0.90

d) cannot be determined with the given information

I got 5/50 = 0.10 but it says it is not correct. Is it d option? If not can you please show me how to get this? Thank you.

Q.1 ) Given X = 500 foot to stop at 60 miles /hour. How many seconds need to stop?

Q.2) Given 40 feet long 18 wheeler at 60 miles/hour, find how many seconds to pass 70 miles/hour?

I can change miles / hour to miles / seconds but I don't know what should do with the distance 500 ft and 40 ft ?

Could you please show me the steps? Thank you.

In a cross of two pure-breeding lines of tomatoes producing different fruit sizes, the variance in grams of fruit weight in the F1 is 2.20g , and the variance among the F2 is 5.00g .

a) Determine the genetiс variance VG for the trait? VG = ?

b)Determine the environmental variance VE for the trait. Ve = ?

c) Determine the broad sense heritability of the trait. H^2 =?

Can someone show me the steps how to get these?

Thanks.

A female Drosophila that is heterozygous for the recessive, sex-linked traits of forked bristles (f), sable body (s) and garnet eyes (g) is mated to a male that is homozygous recessive for all three traits. The phenotypic distribution of 1000 male testcross progeny is shown below: 74 wild type; 70 forked sable garnet; 44 forked; 50 sable garnet; 2 forked sable; 4 garnet; 368 sable; 388 forked garnet.

What is the gene order?

Ans: g --- f --- s

I know the answer but I'm too confused about how to get this, can somebody show me the steps for this?

Thanks.