The level of lead in the blood was determined for a sample of 152 male hazardous-waste workers age 20-30 and also for a sample of 86 female workers, resulting in a mean ± standard error of 5.4 ± 0.3 for the men and 3.1 ± 0.2 for the women. calculate an estimate of the difference between true average blood lead levels for male and female workers in a way that provides information about reliability and precision. (use a 95% confidence interval. round your answers to two decimal places.)

   = ( 1.39, 2.80) blood level for male is greater than female worker by a figure within confidence interval.

Step-by-step explanation:

From the data given:

Difference between average blood lead levels for male and female is calculated as

standard deviation for men is

standard deviation for women is

The degree of freedom calculated as

   = 152+86-2 = 236

The t critical value for alpha 0.05 and 236 degree of freedom is 1.97

   = ( 1.39, 2.80)

  answer:

  write 548 as 500 + 40 + 8. multiply each addend by 5. then add the three products to get 2,740.

really your just stupid if you don't know this

step-by-step explanation: