156 Answered Questions for the topic biostatistics

Biostatistics Math Biology Calculus

04/11/23

#### Collisions in Real Life

Please help me answer the following question, please provide steps, and work. Question: In the movie, The Matrix Reloaded, Neo (80 kg) jumps toward Agent Smith (600 kg) who jumps towards Neo. When... more

04/01/23

#### Photosynthesis: Photosystem ll

What is the general question that you want to ask about Photosystem II that will be experimental for a lab? What specific, testable hypothesis can you generate from that? The hypothesis must be... more
Biostatistics

03/14/23

#### The middle 50 percent of the wires of Company A tested between (_______) and (upper) limits.  Record ONLY the lower limit as a whole number.

The following statistics represent samples of copper wire submitted by two companies for tensile strength testing (psi).Statistic                                                      Company... more
Biostatistics

03/08/23

#### The effect of deviding a variable into different sized groups in logistic regression

My dependent is highly skewed to the left with range of 0-162 (a score of a questionnaire). I'm including it into a logistic regression model with 2 other cofactors. The total N is around 500. I... more
Biostatistics Statistics

02/25/23

#### What is the 90% C.I.

You intend to estimate a population mean � with the following sample. 50.5 60.3 58.8 62 67.4 64.7 69.2 52.6 You believe the population is normally distributed. Find the 90% confidence interval.... more
Biostatistics Statistics

02/20/23

#### a particular fruit...

A particular fruit's weights are normally distributed, with a mean of 425 grams and a standard deviation of 6 grams.If you pick 10 fruit at random, what is the probability that their mean weight... more
Biostatistics Statistics

02/20/23

#### A particular fruit's weights are normally distributed...

A particular fruit's weights are normally distributed, with a mean of 224 grams and a standard deviation of 16 grams. If you pick 11 fruit at random, what is the probability that their mean weight... more
Biostatistics Statistics

12/17/22

#### When taking a certain drug 8.5% experience nausea as a side effect.

A scientist took a random sample of 1102 individuals who were taking the drug and recorded the sample proportion who experienced nausea as a side effect,  ˆp. Assume the sampling distribution... more
Biostatistics Statistics

12/17/22

#### A population of values has a normal distribution with μ = 135.4 and σ = 80.7. You intend to draw a random sample of size n = 12 .

-Find the probability that a single randomly selected value is less than 207.6. P(X < 207.6) =-Find the probability that a sample of size n=12n=12 is randomly selected with a mean less than... more
Biostatistics

12/08/22

#### 1. Which of the following is an appropriate confidence interval to indicate significance for a risk difference of -2.4? 2. A. -2.5 to 0.67 B. 2.4 to 3.6 C. -2.5 to -1.4 D. -2.5 to 1.9

Which of the following is an appropriate confidence interval to indicate significance for a risk difference of -2.4?  A. -2.5 to 0.67 B. 2.4 to 3.6 C. -2.5 to -1.4 D. -2.5 to 1.9
Biostatistics Math Statistics

12/07/22

#### STATISTICS CHAPTER 8

According to a study conducted,the proportion of americans who were afraid to fly in 2012 was 0.10. A random sample of 150 americans resulted in 13 indicating that they were afraid. Explain why... more
Biostatistics Statistics

12/07/22

#### From a full deck of cards, you are dealt two cards. What is the probability of getting i) A king and a Queen? ii) Two cards from the same suit? iii) A king and a Queen from the same suit?

From a full deck of cards, you are dealt two cards. What is the probability of gettingi) A king and a Queen?ii) Two cards from the same suit?iii) A king and a Queen from the same suit?
Biostatistics Statistics

12/06/22

#### From a full deck of cards, you are dealt two cards. What is the probability of getting i) A king and a Queen? ii) Two cards from the same suit? iii) A king and a Queen from the same suit?

From a full deck of cards, you are dealt two cards. What is the probability of gettingi) A king and a Queen? ii) Two cards from the same suit? iii) A king and a Queen from the same suit?
Biostatistics

11/14/22

#### Survival analysis

Suppose you were given survival data for subjects randomized to one of the two treatment groups. The variables included id, time (time to relapse in days), censor (1 if observing time to relapse, 0... more
Biostatistics Statistics

11/04/22

#### What are the sample mean and margin of error?

50 random flights from D.C to New York City were selected and the resulting 95% confidence interval was (82.5, 88.7). What are the sample mean and margin of error?
Biostatistics Chemistry Statistics

10/21/22

#### how are detection limits related to standard deviations and why does this relationship exist?

how are detection limits related to standard deviations and why does this relationship exist?
Biostatistics Statistics

10/15/22

#### What is the probability of obtaining a sample mean smaller than 1.97 ounces?

A small bag of Doritos has a mean weight of 2 ounces with a standard deviation of 0.1 ounces. A sample of 30 bags were randomly selected and their weight was measured.  What is the probability of... more
Biostatistics Statistics

10/15/22

#### What is the standard deviation of the distribution of all possible sample means?

The mean test score for all students in Math221 was 80 with a standard deviation of 14. If we took a random sample of 24 test scores, what is the standard deviation of the distribution of all... more
Biostatistics Statistics

10/15/22

#### What can you conclude about the shape of the test score distribution?

The mean test score for exam 1 was 82, while the median was 88. What can you conclude about the shape of the test score distribution?
Biostatistics Statistics

10/15/22

#### 68-95-99.7 rule

Olympic 100 meter dash times (measured in seconds) this year are normally distributed and have a mean time μ = 10.5 and a standard deviation of 𝝈 = 0.5. Use the 68-95-99.7 rule to... more
Biostatistics Biology Biochemistry

08/26/22

#### A researcher is trying to study a enzyme-catalyzed reaction in lab. while the reaction is fully saturated with substrate, what should he do to speed up the reaction..?

Options are :A) Add more enzymeB) Adjust the pH to 7.2C) Increase the temperatureD) Remove some substrate

06/19/22

#### Answer the question given in the description.

Design the experiment to describe the action of milk sugar digested into sour taste yoghurt.the experiment should have; Materials Procedures Conclusion Picture link which is similar to the... more
Biostatistics Usmle

05/28/22

#### USMLE statistics practice question

Note not typical USMLE question but demonstrates understanding of relationship between medical statistics essential for learning and USMLE (on all but heavily on step three)The prevalence of the... more
Biostatistics Math Statistics Probability

04/12/22

#### Choose the procedure for estimating the mean difference.

Suppose that a scientist seeks to compare the ability of a new hand sanitizer to eliminate Pseudomonas aeruginosa bacteria against the hand sanitizer currently in use. Assume that the mean number... more

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