User Account

All Pages

What is the z critical value of confidence interval

Assignment Help Basic Statistics
Reference no: EM132399888

The Dean of the college of business at the University of Laverne has observed for several years and found that the probability distribution of the salary of the alumni's first job after graduation is normal. the college collected information from 1000alumni and finds at the mean of their salary is $50k. assuming a 95% confidence level please do the following

Suppose the population standard deviation of $9k

  1. What is the Z critical value of 95% confidence interval?
  2. What is the standard error?
  3. Please estimate the confidence interval of the populations average salary?

Reference no: EM132399888

Questions Cloud

What is the standard error of the sample proportion : What is the standard error of the sample proportion for a sample of 100 Netflix consumers? and of 200 Netflix consumers? (to 5 decimal places)
Analyzed for decibel intensity : If this data set is normally distributed, we would expect approximately 95% of the barks to be within what range? Use 68-95-99.7 Rule.
What is the mean of this population : A company has hired 6 students. This is the entire population of new students hired. They have student loans
What is the standard error of the sample proportion : In 2017, 77% of the of the population of Facebook users had a positive opinion of the service.
What is the z critical value of confidence interval : What is the Z critical value of 95% confidence interval? What is the standard error?
Issue management process : Issue management process - Why ethical problems occur in business and Key reasons business should be ethical - what is right and wrong acceptable.
Huyen runs a regression with 4 explanatory variables : 1. Huyen runs a regression with 4 explanatory variables (excluding the intercept) and 10 observations. Her R2 is 0.9. What's her adjusted R2?
What is the probability that one of the marbles is white : You have a bag of 5 white marbles, 8 blue marbles and 10 yellow marbles. You draw three marbles from the bag, without replacement:
DSCI 352 –Analytics I-Predictive Models- Assignment Problem : DSCI 352 – Analytics I: Predictive Models Assignment Help and Solutions, University of Mary Washington, US-Create an R function which will take in a vector.

Reviews

Write a Review

Basic Statistics Questions & Answers

  Testing the difference of proportions

In testing the difference of proportions (is the proportion of flyers delivered by the new company higher than the proportions delivered by the existing

  What conclusion would be reached in given situation

The average U.S. household has $178,600 in life insurance.- Using a nondirectional hypothesis test and a level of significance of your choice, what conclusion would be reached?

  What percent of total applicants were admitted

Graduate admissions. A 1975 article in the magazine Science examined the graduate admissions process at Berkeley for evidence of sex discrimination.

  Minimum expected annual return

What would be the minimum expected annual return for Stock C to achieve the overall investment requirement?

  Compute probabilities for the compound events

Knowing that your friend Angella studies for her tests only 40 percent of the time, you place an even bet with a third party that Angella will not study.

  The growth of icicles starting at length

How fast do icicles grow? We have data on the growth of icicles starting at length 10 centimeters (cm) and at length 20 cm. An icicle grows at the same rate, 0.15 cm per minute, starting from either length.

  Reject the null hypothesis

The Z calculated value (2.35) is greater than the Z critical value (1.96) and thus we reject the null hypothesis

  Test the hypothesis that the sample distribution was normal

Test the hypothesis that the sample distribution was normal.

  Which observation is the median

Which observation is the median: 1, 2, or 3?- Move the observations around a bit. How does the median change?- What do you conclude from this exercise?

  Find the expected number of failures due to a problem

Find the expected number of failures due to a problem with the inside wiring. Find the probability that at least 10 failures are due to a problem with inside

  Use the orthogonality principle to find the mmse estimator

Suppose we are allowed to observe a random process Z(r) at two points in time, ro and ri . - Use the orthogonality principle to find the MMSE estimator.

  Notice of the problems within the family

Engaging compassionately means that, the parent must take notice of the problems within the family and pay attention to the distresses of each member while show

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