A nationwide job recruiting firm wants to compare the annual incomes for childcare workers in Arizona and Nevada. Due to recent trends in the childcare industry, the firm suspects that the mean annual income of childcare workers in Arizona is less than the mean annual income of childcare workers in Nevada. To see if this is true, the firm selected a random sample of 10 childcare workers from Arizona and an independent random sample of 10 childcare workers from Nevada and asked them to report their mean annual income. The data obtained were as follows. Annual income in dollars Arizona 35597, 44349, 30210, 47473, 36689, 41493, 30410, 29736, 31880, 39582 Nevada 32082, 46198, 42198, 31466, 44105, 37025, 40391, 37193, 54640, 38686 Send data to calculator Send data to Excel The population standard deviation for the annual incomes of childcare workers in Arizona and in Nevada are estimated as 6300 and 6500, respectively. It is also known that both populations are approximately normally distributed. At the 0.05 level of significance, is there sufficient evidence to support the claim that the mean annual income, u,, of childcare workers in Arizona is less than the mean annual income, l,, of childcare workers in Nevada? Perform a one-tailed test. Then complete the parts below. Carry your intermediate computations to at least three decimal places. (If necessary, consult a list of formulas.)

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.3: Measures Of Spread
Problem 1GP
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Question
(a) State the null hypothesis 
H0
 and the alternative hypothesis 
H1
.
H0:
H1:
(b) Determine the type of test statistic to use.
  ▼(Choose one)
 
(c) Find the value of the test statistic. (Round to three or more decimal places.)
 
(d) Find the p-value. (Round to three or more decimal places.)
 
(e) Can we support the claim that the mean annual income of childcare workers in Arizona is less than the mean annual income of childcare workers in Nevada?
 
Yes 
 
No
A nationwide job recruiting firm wants to compare the annual incomes for childcare workers in Arizona and Nevada. Due to recent trends in the childcare
industry, the firm suspects that the mean annual income of childcare workers in Arizona is less than the mean annual income of childcare workers in Nevada. To
see if this is true, the firm selected a random sample of 10 childcare workers from Arizona and an independent random sample of 10 childcare workers from
Nevada and asked them to report their mean annual income. The data obtained were as follows.
Annual income in dollars
Arizona 35597, 44349, 30210, 47473, 36689, 41493, 30410, 29736, 31880, 39582
Nevada 32082, 46198, 42198, 31466, 44105, 37025, 40391, 37193, 54640, 38686
Send data to calculator
Send data to Excel
The population standard deviation for the annual incomes of childcare workers in Arizona and in Nevada are estimated as 6300 and 6500, respectively. It is also
known that both populations are approximately normally distributed. At the 0.05 level of significance, is there sufficient evidence to support the claim that the
mean annual income, u,, of childcare workers in Arizona is less than the mean annual income, u, of childcare workers in Nevada? Perform a one-tailed test.
Then complete the parts below.
Carry your intermediate computations to at least three decimal places. (If necessary, consult a list of formulas.)
Transcribed Image Text:A nationwide job recruiting firm wants to compare the annual incomes for childcare workers in Arizona and Nevada. Due to recent trends in the childcare industry, the firm suspects that the mean annual income of childcare workers in Arizona is less than the mean annual income of childcare workers in Nevada. To see if this is true, the firm selected a random sample of 10 childcare workers from Arizona and an independent random sample of 10 childcare workers from Nevada and asked them to report their mean annual income. The data obtained were as follows. Annual income in dollars Arizona 35597, 44349, 30210, 47473, 36689, 41493, 30410, 29736, 31880, 39582 Nevada 32082, 46198, 42198, 31466, 44105, 37025, 40391, 37193, 54640, 38686 Send data to calculator Send data to Excel The population standard deviation for the annual incomes of childcare workers in Arizona and in Nevada are estimated as 6300 and 6500, respectively. It is also known that both populations are approximately normally distributed. At the 0.05 level of significance, is there sufficient evidence to support the claim that the mean annual income, u,, of childcare workers in Arizona is less than the mean annual income, u, of childcare workers in Nevada? Perform a one-tailed test. Then complete the parts below. Carry your intermediate computations to at least three decimal places. (If necessary, consult a list of formulas.)
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