Question

A new chemical has been found to be present in the human blood stream, and a...

A new chemical has been found to be present in the human blood stream, and a medical group would like to study the presence of this chemical in some samples of patients. The presence of the chemical in a patient is measured by a score representing the 'parts per billion' in which that chemical appears in the blood. It is known that, on this scale, men have an average score of 805.1 and a standard deviation of 58. It is also known that women have an average score of 829.25 and a standard deviation of 23.

An assistant in the medical team has been handed a sample of 100 scores. The assistant knows that all of the scores are from one of the two genders, but the sample was not documented very well and so they do not which gender this is. Within the sample, the mean score is 818.44.

a)Complete the following statements. Give your answers to 1 decimal place.

If the sample came from a group of 100 men, then the sample mean is ? standard deviations above the mean of the sampling distribution. In contrast, if the sample came from a group of 100 women, then the sample mean is ? standard deviations below the mean of the sampling distribution.

b)Based on this, the assistant is more confident that the sample came from a group of 100 men or women?

Math   Statistics-And-Probability   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
A new chemical has been found to be present in the human blood stream, and a...
A new chemical has been found to be present in the human blood stream, and a medical group would like to study the presence of this chemical in some samples of patients. The presence of the chemical in a patient is measured by a score representing the 'parts per billion' in which that chemical appears in the blood. It is known that, on this scale, men have an average score of 817.0 and a standard deviation of 59. It is...
Height is a normally distributed human characteristic. In the United States, men's heights have mean 69.1...
Height is a normally distributed human characteristic. In the United States, men's heights have mean 69.1 inches and standard deviation 2.9 inches, while female's heights have mean 63.7 inches and standard deviation 2.7 inches. Collect height data on a sample of n=3 men and n=3 women. Complete the following for the sample of men and women separately: List the raw data. Transform each score into a standardized z-score. Identify the percentile rank for each individual. Percentile rank is the percentage...
A movie producer has been handed two scripts. One is a wacky comedy going by the...
A movie producer has been handed two scripts. One is a wacky comedy going by the name of "Poindexter Joins The Army" and the other is a psychological thriller known as "The Deconstructionist". The producer does not know which film to invest in. He is interested in knowing if there is any difference between people's enjoyment of comedies and people's enjoyment of thrillers. He decides to conduct a hypothesis test comparing these. He collects a random sample of 75 people...
5. At Western University the average scholarship examination scores for freshman applications has been 900. Each...
5. At Western University the average scholarship examination scores for freshman applications has been 900. Each year, the assistant dean uses a sample of applications to determine whether the average examination score for the new freshman applications has increased (from the previous year). A random sample of 200 applications was drawn and the average score was found to be 935. Historically, it is known that the score has a Normal distribution and a standard deviation of 180. a) Identify the...
6. Almost all medical schools in the United States require students to take the Medical College...
6. Almost all medical schools in the United States require students to take the Medical College Admission Test (MCAT). The scores follow a normal distribution. From published information the standard deviation is 6.4. On a particular campus, the mean score of those taking the MCAT is 25.0. a. If a student is chosen at random, what is the probability the individual’s score is between 20 and 30? b. In a sample of 25 students, what is the sampling distribution of...
1. The Graduate Record Exam (GRE verbal test) has scores that are normally distributed with a...
1. The Graduate Record Exam (GRE verbal test) has scores that are normally distributed with a mean of 532 and a standard deviation of 128. If one test taker is chosen at random, what is the probability that the person's GRE verbal score is above 500? Use Table 8.1 and leave answer in decimal form. 2. The Graduate Record Exam (GRE verbal test) has scores that are normally distributed with a mean of 532 and a standard deviation of 128....
0. Consider a distribution of raw scores in which the distribution is normal. Consider that each...
0. Consider a distribution of raw scores in which the distribution is normal. Consider that each and every score is converted into a standard score (a z score), such that the resulting distribution is a normal distribution of standard scores (a standard normal distribution, also known as the SND). The standard normal distribution has all the following characteristics, except a. The distribution is bell-shaped. b. The distribution is symmetrical. c. The mean, median, and mode of the distribution are equal...
R Studio Suppose systolic blood pressure of adults has a normal distribution with mean 130 and...
R Studio Suppose systolic blood pressure of adults has a normal distribution with mean 130 and standard deviation 35. Research question: Do statistics teachers have a higher average systolic blood pressure than 130? A random sample of 100 statistics teachers is obtained and the mean is 135. (The population standard deviation is known, so we use Z for critical values.) Solve the using the Confidence Interval Hypothesis Test approach and t.test() Approach. Use the Pima.tr data set to evaluate the...
A sociologist believes that for people under the age of 30, women sleep longer per night...
A sociologist believes that for people under the age of 30, women sleep longer per night on the weekend than men. 16 people were surveyed. Test at alpha =5%. The following summary statistics were determined from the sample. Men: Mean hrs = 10.45 SD hrs = 0.95 n=9 Women: Mean hrs = 11.18 SD hrs = 1.81 n=7 a) State the Null and Alternate Hypothesis in symbols and in words. b) Calculate the expected results for the hypothesis test sampling...
It has been found that scores on the Writing portion of the SAT (Scholastic Aptitude Test)...
It has been found that scores on the Writing portion of the SAT (Scholastic Aptitude Test) exam are normally distributed with mean 484 and standard deviation 115. Use the normal distribution to answer the following questions. (a) What is the estimated percentile for a student who scores 475 on Writing? (b) What is the approximate score for a student who is at the 90th percentile for Writing?
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT