Dr Nick

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About Dr Nick

Levels Tought:
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Teaching Since: May 2017
Last Sign in: 339 Weeks Ago, 5 Days Ago
Questions Answered: 19234
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Education

  • MBA (IT), PHD
    Kaplan University
    Apr-2009 - Mar-2014

Experience

  • Professor
    University of Santo Tomas
    Aug-2006 - Present

Category > Social Science Posted 30 Jul 2017 My Price 11.00

The 99% confidence interval for the population mean (rounded to two decimal places) is

Question 9

The mean IQ score of a sample of 54 students selected from a high school is 89. Suppose the standard deviation of IQ's at this school is σ = 8.6. The 99% confidence interval for the population mean (rounded to two decimal places) is:

The lower limit is 

The upper limit is 

Question 2

A sample of size 118 from a population having standard deviation σ = 9 produced a mean of 42. The 99% confidence interval for the population mean (rounded to two decimal places) is:

The lower limit is 

The upper limit is 

Question 3

The mean federal income tax paid last year by a random sample of 35 persons selected from a city was $4311. Suppose the standard deviation of tax paid in this city is σ = $898. The 95% confidence interval for the population mean (rounded to two decimal places) is:

The lower limit is $

The upper limit is $

Question 8

A random sample of 96 customers, who visited a department store, spent an average of $75 at this store. Suppose the standard deviation of expenditures at this store is σ = $16. The 98% confidence interval for the population mean (rounded to two decimal places) is:

The lower limit is $

The upper limit is $

Answers

Dr Nick
(4)
Status NEW Posted 30 Jul 2017 11:07 AM My Price 11.00

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