User Account

All Pages

Estimate the true proportion of all teenagers

Assignment Help Basic Statistics
Reference no: EM131099508

Suppose that medical researchers want to estimate the true proportion of all teenagers with high blood pressure whose blood pressure would decrease if they took calcium supplements. To test this, they plan a clinical trial in which n = 120 teenagers with high blood pressure will be given calcium supplements. Suppose the clinical trial is completed, and 80 of the 120 participants experienced a decrease in blood pressure.

What is the value of the sample proportion (also called the point estimate) for this sample?  Using the result found in part a, determine the value of the standard error of . Note that in many situations we will not know the true parameter, p, and thus will substitute our sample proportion for p in the calculation of the SE. This formula then for the SE() when p is unknown is: 

  • What is the z score for the given sampling proportion of 0.68 (i.e., the distribution of sample proportions has a mean of your results in a and a standard error of your results in b)?

Reference no: EM131099508

Questions Cloud

Evaluate a proposed equipment acquisition indicated : A net present value analysis used to evaluate a proposed equipment acquisition indicated a $7,900 net present value. What is the meaning of the $7,900 as it relates to the desirability of the proposal?
Salaries of assistant professors : According to a recent survey, the salaries of assistant professors have a mean of $41750 and a standard deviation of $7000. Assuming that the salaries of assistant professors follow a normal distribution, find the proportion of assistant professors..
The harmonization and adoption of ifrs by hkicpa : ABC Ltd. began trading on 1 January 2016 with capital of $200,000, all of which was immediately spent on buying inventories. On 31 January 2016, 75% of the inventories were sold for $237,500 in cash. There were no other transactions in January 201..
Correlation does not imply causation : There is a famous saying in statistics that "Correlation does not imply causation". Please address the following questions:
Estimate the true proportion of all teenagers : Suppose that medical researchers want to estimate the true proportion of all teenagers with high blood pressure whose blood pressure would decrease if they took calcium supplements.
Determine the condition for stability : We wish to apply negative feedback with K = 1 around the three-stage amplifier shown in Fig. 12.67(a). Neglecting other capacitances and assuming identical stages, plot the frequency response of the circuit and determine the condition for stabilit..
Normal approximation-correction for continuity : He chooses a random sample of 200 seeds and plants them with the aid of the fertilizer. Assuming his belief to be true, approximate the probability that at least 148 of the 200 seeds will germinate. Use the normal approximation to the binomial with..
Calculate the payback period for each project : Calculate the payback period for each project. Which, if either, of these projects should be chosen? What is the NPV for each project if the appropriate discount rate is 15 percent? Which, if either, of these projects should be chosen if the appro..
Determine the maximum tensile and compressive stresses : Determine the maximum tensile and compressive stresses in portion BC of the beam and determine the final length, width, and thickness.

Reviews

Write a Review

Basic Statistics Questions & Answers

  Every normal model is defined by its parameters the mean

every normal model is defined by its parameters the mean and the standard deviation.suppose that the mean ? 20 and that

  Determining the proof of the equivalence theorem

If x has infinitely many ancestors, then how is h(x ) chosen according to the proof of the equivalence theorem (1.4.1)?

  Find mean of number of cars recovered after stolen

If 300 stolen cars are randomly selected, what is the mean and standard deviation of the number of cars recovered after being stolen?

  Draw a scatter plot of arm span x versus height y and the

a draw a scatter plot of arm span x versus height y and the regression line.b obtain the correlation coefficient r the

  Interquartile range of the quarterly range of the group

In the last quarter of 2007 a group of 64 mutual funds had a mean return of 0.9% with a standard deviation of 5.2%. Consider the normal model N(0.009.052) for the returns of these mutual funds.

  Calculating the utility for pay off

Paul has calculated the indifference probability for the lottery having a payoff of $160K with probability p and -$80K with probability (1-p) as follows:

  Information about basic statistics and probability

A manufacturer of batteries for "kids' toys" wishes to investigate the length of time a battery will last. Tests results on a sample of 10 batteries indicated a sample mean of 5.67 and a sample standard deviation of 0.57.

  Compute which assembly time using the new method is faster

The management of White companies considering a new method of assembling its golf cart. Compute which assembly time using the new method is faster.

  Testing for population mean

Testing for Population mean - Based on this sample evidence, is Joan's supervisor correct? Use a = .05.

  The following artificial data record the length of stay in

question 1the following artificial data record the length of stay in days spent on a psychiatric ward for 28

  Determining probability of heads on the fifth trial

If "fair" coin is tossed four times and comes up heads all four times, probability of heads on the fifth trial is?

  A bank recorded the number of atm transactions made by its

q1. a multiple-choice test has 6 questions. there are 4 choices for each question. a student who has not studied for

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!

Submit Assignment

Academics

Major Subjects

Majors

Get In Touch

whatsapp: +1-415-670-9521

Phone: +1-415-670-9521

Email: [email protected]

TERMS & POLICIES

HELP & SUPPORT

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