5. A newspaper article estimated that the mean cost for preventive dental care was $165 They indicated that the estimate was based on a sample of 100 people and that the margin of error was 2.8. Assuming a 95% confidence level was used, calculate the value of the standard per year. error.

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4. We want to estimate the mean of a population. A random sample of subjects is selected and the
sample mean is computed. What is the probability that the sample mean is within 3 units of the
true mean if the standard error is 1.8?
5. A newspaper article estimated that the mean cost for preventive dental care was $165 per year.
They indicated that the estimate was based on a sample of 100 people and that the margin of
error was 2.8. Assuming a 95% confidence level was used, calculate the value of the standard
error.
24°C
acer
00
HUAWEI P30 lite
TRIPLE CAMERA
Transcribed Image Text:4. We want to estimate the mean of a population. A random sample of subjects is selected and the sample mean is computed. What is the probability that the sample mean is within 3 units of the true mean if the standard error is 1.8? 5. A newspaper article estimated that the mean cost for preventive dental care was $165 per year. They indicated that the estimate was based on a sample of 100 people and that the margin of error was 2.8. Assuming a 95% confidence level was used, calculate the value of the standard error. 24°C acer 00 HUAWEI P30 lite TRIPLE CAMERA
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