Ask Question, Ask an Expert

+1-415-315-9853

info@mywordsolution.com

Ask Statistics and Probability Expert

problem1. The data set lowbwt.sav having information for a sample of 100 low birth weight infants born in two teaching hospitals in Boston. Measurements of the systolic blood pressure are saved under the variable name sbp and indications of gender—with 1 representing a male and 0 a female—under the name sex.

(a) Find a histogram of systolic blood pressure. Based on graph, do you think that blood pressure is approximately normally distributed?

(b) Employ the Shapiro-Wilks test to check for the normality of blood pressure. Carefully describe your conclusion.

(c) Find the mean and standard deviation of blood pressure by sex. prepare a short abstract of these summary statistics.

(d) Test the null hypothesis that among low birth weight infants, the mean systolic blood pressure for boys is equal to the mean for girls.

Use a two-sided test at the 5% level of significance. What do you conclude?

problem2. A number of years ago the American Academy of Pediatrics suggested that tetracycline drugs not be used for children under the age of 8. Prior to this recommendation, a two-year study conducted in Tennessee had investigated the extent to which physicians prescribed this drug in the prior two years. In the study a random sample of 770 family practice physicians were characterized according to whether the county of their practice was urban, suburban, or rural. The numbers of doctors in each of these categories who did and didn’t prescribe tetracycline to at least one child under the age of 8 are given below.

                     Urban       County Suburban    Rural
Tetracycline      65              90                      172
No Tetracycline 149            136                    158

Please use SPSS only for part (i) below.

(a) Identify the illustrative and the response variables in this case.

(b) For each county type, find out the percentage of physicians who prescribed tetracycline.

(c) Based on your percentages in part (b), elucidate the relationship, if any, between the two variables.

(d) find out the expected counts for the six cells under assumption that these two variables are independent.

(e) find out the value for the test statistic associated with the Chi-square test for independence.

(f) Use the Vassar applet to evaluate the p-value associated with this test.

(g) Find the odds of prescribing tetracycline for physicians in each of three county types.

(h) Find two odds ratio using urban counties as the reference. Put the odds for urban counties as the denominator in each case. Interpret your two values.

(i) You will find the raw data for this problem in the data set tetracycline.sav. Use SPSS to get your values in parts (b), (d), (e), and (f). Paste your output here.

Statistics and Probability, Statistics

  • Category:- Statistics and Probability
  • Reference No.:- M91145

Have any Question? 


Related Questions in Statistics and Probability

At a university the average cost of books per student has

At a university, the average cost of books per student has been $400 per student per semester. The Dean of Students believes that the costs are increasing and that the average is now greater than $400. He surveys a sampl ...

A random sample of 1260 adults living innbspnew york

A random sample of 1,260 adults living in New York city was asked (among other things) to name their favorite sports (to watch). Of the 670 females in the survey, 375 indicated that baseball was their favorite sport. Of ...

Net exports are calculated by subtracting imports from

Net Exports are calculated by subtracting Imports from Exports. Assume Exports and Imports are independent of one another.  If mean exports are $25M with a standard deviation of $3.5M and mean imports are $30M with a sta ...

There are 1000 students in a high school among the 1000

There are 1000 students in a high school. Among the 1000 students, 150 students take AP Statistics, and 300 students take AP French. 100 students take both AP courses. Let S be the event that a randomly selected student ...

A hospital emergency room analyzed n17665 hourly

A hospital emergency room analyzed n=17,665 hourly observations on its average occupancy rates using six binary predictor variables representing days of the week and two binary predictors representing the 8 hour work shi ...

What main effects and interaction could you test with the

What main effects and interaction could you test with the design you developed for Question 1? Are you predicting that you will obtain an interaction? Question 1 Build on the design you created in Question 2 to test the ...

A buyer suspects that the factorys claimed life of mean is

A buyer suspects that the factory's claimed life of mean is 3000 hours for these light balls are too high. To check the claim, the factory tests 50 of these light balls and gets a mean lifetime of sample mean = 2988 hour ...

Name and explain the contributions of three abolitionists

Name and explain the contributions of three Abolitionists that supported and helped African Americans before the Civil War fight slavery?

An accounting professor is notorious for being stingy in

An accounting professor is notorious for being stingy in giving out good letter grades. In a large section of 140 students in the fall semester, she gave out only 5% As, 23% Bs, 42% Cs, and 30% Ds and Fs. Assuming that t ...

A researcher studying correctional treatment on 192 sex

A researcher studying correctional treatment on 192 sex offenders composed of 10 females and 182 males finds that 11 males along with 1 female had reoffended. He then calculates the percentages and finds that 10% of fema ...

  • 4,153,160 Questions Asked
  • 13,132 Experts
  • 2,558,936 Questions Answered

Ask Experts for help!!

Looking for Assignment Help?

Start excelling in your Courses, Get help with Assignment

Write us your full requirement for evaluation and you will receive response within 20 minutes turnaround time.

Ask Now Help with Problems, Get a Best Answer

Section onea in an atwood machine suppose two objects of

SECTION ONE (a) In an Atwood Machine, suppose two objects of unequal mass are hung vertically over a frictionless

Part 1you work in hr for a company that operates a factory

Part 1: You work in HR for a company that operates a factory manufacturing fiberglass. There are several hundred empl

Details on advanced accounting paperthis paper is intended

DETAILS ON ADVANCED ACCOUNTING PAPER This paper is intended for students to apply the theoretical knowledge around ac

Create a provider database and related reports and queries

Create a provider database and related reports and queries to capture contact information for potential PC component pro

Describe what you learned about the impact of economic

Describe what you learned about the impact of economic, social, and demographic trends affecting the US labor environmen