User Account

All Pages

Estimate the standard deviation of iq scores

Assignment Help Basic Statistics
Reference no: EM131180820

Confidence interval for the population standard deviation

A psychologist wants to estimate the standard deviation of IQ scores. It is widely believed that IQ scores follow a normal distribution. Her random sample of 30 IQ scores has a mean of 102.3 and a standard deviation of 19.5 . Find the 90% confidence interval for the population standard deviation based on this sample. Then complete the table below. Need to find the upper and lower 90% CI. Please show all your work.

THanks a BUNCH!!!

Carry your intermediate computations to at least three decimal places. Round your answers to at least two decimal places

Reference no: EM131180820

Questions Cloud

Determine the required minimum diameter d of the post : determine the required minimum diameter d of the post to the nearest 1/8 in. so that it will not yield when it is struck by the block.
Expected rate of return on the market portfolio : 1. What is the beta of a portfolio if E(RP ) = 16%, µf = 5.5%, and E(RM ) = 11%? 2. Suppose that the risk-free rate of interest is 0.03 and the expected rate of return on the market portfolio is 0.14. The standard deviation of the market port..
Have the roses acted ethically in alleging : Have the Roses acted ethically in alleging that the demand note should not be enforced against them because they had not read the note?
Perform a strategic audit of tesla motors : Perform a strategic audit of Tesla Motors, Inc. A good starting point is the company's investor relations website at: http://ir.teslamotors.com/
Estimate the standard deviation of iq scores : A psychologist wants to estimate the standard deviation of IQ scores. It is widely believed that IQ scores follow a normal distribution. Her random sample of 30 IQ scores has a mean of 102.3 and a standard deviation of 19.5.
What are the four domains of emotional intelligence : Discuss the Formula for Credibility and write about the key aspects of Competence, Caring, and Character. Explain the FAIR approach to evaluating ethical business communications. Why is emotional intelligence so important in logical business tasks?
Discuss your ideas for this type of program : Discuss your ideas for this type of program. What does it need to include? What does the program need to offer employees? How would you communicate this to your employees
What was the prediction : It is not only men who spend massive sums online, but also women, in direct contradiction ofTime's prediction.- what was the prediction.
Construct a scatter plot : 1. Construct a scatter plot 2. Find the value of the linear correlation coefficient r. 3. Find the critical values of r from attached table (see attachment).  Use α = 0.05

Reviews

Write a Review

Basic Statistics Questions & Answers

  Does correlation equal causation

Does correlation equal causation? Does the strength of correlation depend on the direction of the relationship? What is the meaning of a zero correlation? Explain your answers.

  Difference in fractions of men suffering from heart disease

Estimate with 90% confidence the difference in the fractions of men suffering from heart disease between smokers and nonsmokers.

  Probability that none will have returns audited

20% of their income tax returns are audited. Of five randomly chosen individuals, what is the probability that none will have their returns audited?

  Statistical reasoning

Please explain by using the traditional methods for testing hypotheses and showing the results of all steps in the process.

  Each private locker in the gym building is labeled with

each private locker in the gym building is labeled with three upper-case alpha characters followed by two base 16

  Link and other vendors of biometrics

Enter on link and other vendors of biometrics. Find the devices they make that can be used to control access into information systems. Prepare a list of products and major capabilities of each vendor.

  Cnstruct x and s charts to show that the process in

parts manufactured by an injection molding process are subjected to a compressive strength test. twenty samples of

  Duality gap of the knapsack problem

(Duality Gap of the Knapsack Problem) Given objects i = 1,...,n with positive weights wi and values vi, we want to assemble a subset of the objects so that the sum of the weights of the subset does not exceed a given T > 0, and the sum of the valu..

  Supply a suitable definition of a non-homogenous compund

a supply a suitable definition of a non-homogenous compund poisson process xt t in 0 infinity b does xt have

  Estimating the standard error of the mean

When using the distribution of sample means to estimate the population mean, what is the benefit of using larger sample sizes?

  Estimation of the parameters for the normal and lognormal

estimation of the parameters for the normal and lognormal distributions.data set a 2 14 23 45 67 75 89 99 101 123 138

  Using p-value approach-interpret the value of p-value

(A) At the 0.05 level of significance, use the six step critical value approach to hypothesis testing to try and prove that the 2004 proportion has increased. (B) Use the 5 step p-value approach. Interpret the meaning of the p value.

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