Bb Homeworks - BUAD3355e- Liferay+Bb Syllabus v 8.21- BUAD335Free Introductory BusinessIntroductoryBusinessS XLGhttps://d3bxy9euw4e147.cloudfront.net/oscms-prodcms/media/documents/IntroductoryBusinessStatistics-OP_MxkHmqw.pdfOptions98No resultsC. HCCUrumg LU dn dlLICle TVewSweeK, uie ldlurdi TdLIO OI giTIS (O DOYS is TuU.IUJ. TIT C ma, LITE DmT Tatio IS TO0. IT4(46.7% girls). Suppose you don't believe the reported figures of the percent of girls born in China. You conduct a study.In this study, you count the number of girls and boys born in 150 randomly chosen recent births. There are 60 girls and 90boys born of the 150. Based on your study, do you believe that the percent of girls born in China is 46.7?66. A poll done for Newsweek found that 13% of Americans have seen or sensed the presence of an angel. A contingentdoubts that the percent is really that high. It conducts its own survey. Out of 76 Americans surveyed, only two had seenor sensed the presence of an angel. As a result of the contingent's survey, would you agree with the Newsweek poll? Incomplete sentences, also give three reasons why the two polls might give different results.67. The mean work week for engineers in a start-up company is believed to be about 60 hours. A newly hired engineerhopes that it's shorter. She asks ten engineering friends in start-ups for the lengths of their mean work weeks. Based on theresults that follow, should she count on the mean work week to be shorter than 60 hours?Data (length of mean work week): 70; 45; 55; 60; 65; 55; 55; 60; 50; 55.68. Sixty-eight percent of online courses taught at community colleges nationwide were taught by full-time faculty. Totest if 68% also represents California's percent for full-time faculty teaching the online classes, Long Beach City College(LBCC) in California, was randomly selected for comparison. In the same year, 34 of the 44 online courses LBCC offeredwere taught by full-time faculty. Conduct a hypothesis test to determine if 68% represents California. NOTE: For moreaccurate results, use more California community colleges and this past year's data.69. According to an article in Bloomberg Businessweek, New York City's most recent adult smoking rate is 14%. Supposethat a survey is conducted to determine this year's rate. Nine out of 70 randomly chosen N.Y. City residents reply that theysmoke. Conduct a hypothesis test to determine if the rate is still 14% or if it has decreased.Oo e9:46 PMType here to search11/25/2019hpCo

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Asked Nov 26, 2019
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Help with #67

Bb Homeworks - BUAD3355
e- Liferay
+
Bb Syllabus v 8.21- BUAD335
Free Introductory Business
IntroductoryBusinessS X
LG
https://d3bxy9euw4e147.cloudfront.net/oscms-prodcms/media/documents/IntroductoryBusinessStatistics-OP_MxkHmqw.pdf
Options
98
No results
C. HCCUrumg LU dn dlLICle TVewSweeK, uie ldlurdi TdLIO OI giTIS (O DOYS is TuU.IUJ. TIT C ma, LITE DmT Tatio IS TO0. IT4
(46.7% girls). Suppose you don't believe the reported figures of the percent of girls born in China. You conduct a study.
In this study, you count the number of girls and boys born in 150 randomly chosen recent births. There are 60 girls and 90
boys born of the 150. Based on your study, do you believe that the percent of girls born in China is 46.7?
66. A poll done for Newsweek found that 13% of Americans have seen or sensed the presence of an angel. A contingent
doubts that the percent is really that high. It conducts its own survey. Out of 76 Americans surveyed, only two had seen
or sensed the presence of an angel. As a result of the contingent's survey, would you agree with the Newsweek poll? In
complete sentences, also give three reasons why the two polls might give different results.
67. The mean work week for engineers in a start-up company is believed to be about 60 hours. A newly hired engineer
hopes that it's shorter. She asks ten engineering friends in start-ups for the lengths of their mean work weeks. Based on the
results that follow, should she count on the mean work week to be shorter than 60 hours?
Data (length of mean work week): 70; 45; 55; 60; 65; 55; 55; 60; 50; 55.
68. Sixty-eight percent of online courses taught at community colleges nationwide were taught by full-time faculty. To
test if 68% also represents California's percent for full-time faculty teaching the online classes, Long Beach City College
(LBCC) in California, was randomly selected for comparison. In the same year, 34 of the 44 online courses LBCC offered
were taught by full-time faculty. Conduct a hypothesis test to determine if 68% represents California. NOTE: For more
accurate results, use more California community colleges and this past year's data.
69. According to an article in Bloomberg Businessweek, New York City's most recent adult smoking rate is 14%. Suppose
that a survey is conducted to determine this year's rate. Nine out of 70 randomly chosen N.Y. City residents reply that they
smoke. Conduct a hypothesis test to determine if the rate is still 14% or if it has decreased.
Oo e
9:46 PM
Type here to search
11/25/2019
hp
Co
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Bb Homeworks - BUAD3355 e- Liferay + Bb Syllabus v 8.21- BUAD335 Free Introductory Business IntroductoryBusinessS X LG https://d3bxy9euw4e147.cloudfront.net/oscms-prodcms/media/documents/IntroductoryBusinessStatistics-OP_MxkHmqw.pdf Options 98 No results C. HCCUrumg LU dn dlLICle TVewSweeK, uie ldlurdi TdLIO OI giTIS (O DOYS is TuU.IUJ. TIT C ma, LITE DmT Tatio IS TO0. IT4 (46.7% girls). Suppose you don't believe the reported figures of the percent of girls born in China. You conduct a study. In this study, you count the number of girls and boys born in 150 randomly chosen recent births. There are 60 girls and 90 boys born of the 150. Based on your study, do you believe that the percent of girls born in China is 46.7? 66. A poll done for Newsweek found that 13% of Americans have seen or sensed the presence of an angel. A contingent doubts that the percent is really that high. It conducts its own survey. Out of 76 Americans surveyed, only two had seen or sensed the presence of an angel. As a result of the contingent's survey, would you agree with the Newsweek poll? In complete sentences, also give three reasons why the two polls might give different results. 67. The mean work week for engineers in a start-up company is believed to be about 60 hours. A newly hired engineer hopes that it's shorter. She asks ten engineering friends in start-ups for the lengths of their mean work weeks. Based on the results that follow, should she count on the mean work week to be shorter than 60 hours? Data (length of mean work week): 70; 45; 55; 60; 65; 55; 55; 60; 50; 55. 68. Sixty-eight percent of online courses taught at community colleges nationwide were taught by full-time faculty. To test if 68% also represents California's percent for full-time faculty teaching the online classes, Long Beach City College (LBCC) in California, was randomly selected for comparison. In the same year, 34 of the 44 online courses LBCC offered were taught by full-time faculty. Conduct a hypothesis test to determine if 68% represents California. NOTE: For more accurate results, use more California community colleges and this past year's data. 69. According to an article in Bloomberg Businessweek, New York City's most recent adult smoking rate is 14%. Suppose that a survey is conducted to determine this year's rate. Nine out of 70 randomly chosen N.Y. City residents reply that they smoke. Conduct a hypothesis test to determine if the rate is still 14% or if it has decreased. Oo e 9:46 PM Type here to search 11/25/2019 hp Co

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Expert Answer

Step 1

67.

The hypotheses are given below:

Null hypothesis: H 60
Alternative hypothesis: H 60
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Null hypothesis: H 60 Alternative hypothesis: H 60

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Step 2

Here, the test is one-tailed test.

The degrees of freedom is obtained as follows:

п-1%10—1
9
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п-1%10—1 9

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Step 3

Step-by-step procedure to obtain the critical value using MINITAB:

  • Choose Graph > Probability Distribution Plot choose View Probability > OK.
  • From Distribution, choose ‘t’ distribution.
  • In Degrees of freedom, enter 9.
  • Click the Shaded Area
  • Choose Probability and Left Tail for the region of the curve to shade.
  • Enter the Proba...
Distribution Plot
T, df 9
0.4
0.3
0.2
0.1
0.05
0.0
1.833
0
Density
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Distribution Plot T, df 9 0.4 0.3 0.2 0.1 0.05 0.0 1.833 0 Density

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