Comparison of two populations

Assignment Help Basic Statistics
Reference no: EM1394128

A seven year old study reported that women whose mothers used the drug DES during pregnancy were twice as likely to develop tissue abnormalities that might lead to cancer as women whose mothers did not take the the drug.

a. This study involved the comparison of two populations. What were the populations?

b. Do you suppose the data were obtained in a survey or an experiment?

c. For the population of women whose mothers took the drug DES during pregnancy, a sample of 3980 women showed 63 developed tissue abnormalities that might lead to cancer. Provide a descriptive statistic that could be used to estimate the number of women out of 1000 in this population who have tissue abnormalities.

d. For the population of women whose mothers did not take the drug DES during pregnancy, what is the estimate of the number of women out of 1000 who would be expected to have tissue abnormalities?

e. Medical studies often use a relatively large sample (in this case, 3980). Why?

Reference no: EM1394128

Questions Cloud

Problem related to faculty salaries : Each undergraduate course taught cost the college an average of $2,500 in faculty wages, and each graduate courses cost $ 3,000. How many undergraduate and graduate courses should be taught in the fall so that the total faculty salaries are kept t..
Explain how much would the organization save in interest : Illustrate what if interest rates on the 10 percent loan go up to 15 percent in the second year also 18 percent in the third year? Illustrate what would be the total interest cost compared to the 12 percent, three year loan.
Difference between fetal and adult hemoglobin : The difference between fetal and adult hemoglobin with regard to oxygen binding occurs because fetal hemoglobin has an amino acid substitution in one of its chains that results in a histidine being replaced by a serine.
Explain main customer groups served by company : Give the company situation be able to explain industry dynamics of technological innovation. Recognize the key customer groups served by your company
Comparison of two populations : A seven year old study reported that women whose mothers used the drug DES during pregnancy were twice as likely to develop tissue abnormalities that might lead to cancer as women whose mothers did not take the the drug.
What is the effect of lower entry barriers on new entrants : Explain why do certain entry barriers decrease as a result of cloud computing? Illustrate what is the effect of lower entry barriers on new entrants, entrepreneurship also venture capital? On existing competitors?
Illustrate what times will keep costs : A cellular phone industry offers a contract for which the cost C, of t minutes of telephoning is provided by C + 0.25(t400) + 60.95, where it is supposed which t>400 minutes. Illustrate what times will keep costs between $102.20 also $138.95.
Trainee positions in a fast-food management program : There are 20 qualified applicants for 5 trainee positions in a fast-food management program. How many different groups of trainees can be selected?
Estimates the effectiveness of seniority : Estimates the effectiveness of seniority, assessment centers also job knowledge as substantive internal selection procedures.

Reviews

Write a Review

 

Basic Statistics Questions & Answers

  Statistical abstract of the united states

The following table is based on information taken from the Medical Practice Characteristics section of the Statistical Abstract of the United States

  Break even and simulated process

As part of their application for a loan to buy Lakeside Farm, a property they hope to develop as a bed-and-breakfast operation, the prospective owners have projected:

  Fixing null and alternate hypotheses for single proportion

In terms of  p , the researcher should test which of the following null and alternative hypotheses?

  Suppose we drew a histogram

Suppose we drew a histogram of these 18 death rates using class intervals 1 — 1.9, 2 — 2.9, 3 — 3.9, 4 — 4.9 and 5 — 5.9. Using the histogram, we would

  Random selection from the sophomores

Mr. Connors philosophy class has 99 students, classified by academic year and gender, as illustrated in the table below. Mr. Connor randomly chooses one student to collect yesterday's work. What is the probability that he selects a male, given tha..

  Normal distributions-distribution of sums

A straight rod is formed by connecting three sections A, B and C, each of which is manufactured on a different machine. The length of section A, in inches has a normal distribution with mean 20 and variance 0.04.

  Standardized to normal model with mean

Some IQ tests are standardized to normal model with mean of 100 and the standard deviation of 16. Draw a model for these IQ scores, clearly label it , showing what the 65-95-99.7 rule predicts about the score.

  Value of the sample mean

A random sample has been taken from a normal distribution and the following confidence intervals constructed using the same data: (38.02, 61.98) and (39.95, 60.05). What is the value of the sample mean?

  Elucidate this data use an appropriate statistical test

Elucidate this data use an appropriate statistical test to explain whether the population mean TV "on" time has declined in the past decade.

  Chi-square test for independent of attributes

Chi-square test for independent of attributes - A random sample of students is interviewed to determine if there is an association between class and attitude toward corporations?

  Computing probability values for the given data

A random sample of 100 students at Southern University was collected. The mean age was found to be 24.2 years, with a standard deviation of 3.4 years.

  Calculation of percentage based on z value

Women's heights are normally distributed with mean 63.6 and standard deviation of 2.5 in. A social organization for tall people has a requirement that women must be at least 70 in tall.

Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd