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Not sure about question f-j . looking to confirm my answers with someone Health spending per...

Not sure about question f-j . looking to confirm my answers with someone

Health spending per person from a random sample of 20 countries is shown below.

Country

Per capita health expenditure in 2010

Bahrain

868

Belarus

324

Belize

243

Brunei Darussalam

886

Colombia

476

Congo, Rep.

76

Cote d’Ivorie

64

Cuba

611

Finland

3988

Germany

4672

Guinea-Bissau

51

Guyana

184

Jamaica

247

Lesotho

113

Malta

1701

Morocco

152

Namibia

365

Phillipines

81

Qatar

1493

Saudi Arabia

684

  1. Create a histogram by hand for the frequencies of the per capita health expenditure data.
  2. What feature or features of this distribution indicate that the data are likely not from a population having a normal distribution?
  3. What features of this distribution make it a good candidate to try a log transformation?
  4. Calculate the natural log transformation for each data point of the sample. Create a new histogram with this transformed data, by hand.
  5. What is the sample size?
  6. What is the mean of the log health expenditure?
  7. What is the standard deviation of the mean log health expenditure?
  8. Calculate the standard error of the mean log health expenditure.
  9. Calculate the 95% confidence interval for the mean log health expenditure and interpret it in full sentences.
  10. What are the 95% confidence intervals on the non-log scale? Convert back the two values in your confidence interval.

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