Question

A study was recently conducted to estimate the mean cholesterol for adult males over the age of 55 years. The following random sample data were observed: 245 304 135 202 300 196 210 188 256 390 Given this information, what is the point estimate for the population mean? Question 2 options: About 242.6 ±102 About 73.35 Can't be determined without knowing the confidence level.

Answer 1

The point estimate for the population mean cholesterol level for adult males over the age of 55 years is 242.6 mg/dL, calculated by averaging the values from the given sample data.

Step-by-step explanation:

The point estimate for the population mean is the average of the sample data. Here are the steps to calculate it:

• Add all the sample values together to get the sum: 245 + 304 + 135 + 202 + 300 + 196 + 210 + 188 + 256 + 390 = 2,426.
• Divide the sum by the number of data points to find the mean: 2,426 / 10 = 242.6.

So, the point estimate for the population mean cholesterol level for adult males over the age of 55 years is 242.6 mg/dL. This value is the best estimate for the mean cholesterol level based on the sample given.

Answer 2

Answer: point estimate = 242.6

Step-by-step explanation:

From the information given,

Number of adults sampled = 10

Mean = sum of the ages/number of adults sampled

Mean = (245 + 304 + 135 + 202 + 300 + 196 + 210 + 188 + 256 + 390)/10 = 242.6

The sample mean is the point estimate for the population mean

The confidence level is required to determine the margin of error between the point estimate and the population mean