The speed of certain light waves in the outer space can be I
measured by the equation L(I) = 1000 log , where L(I)
Io
is measured in km/s, Io is the intensity of a barely detectable
light radiation, and I is the actual radiation we get from the
light waves.
If the light's radiation is doubled, by how many km/s does the
speed increase? Round your answer to the nearest hundredth.
decibels

Arandom sample of 15 observations is used to estimate the population mean. the sample mean and the standard deviation are calculated as 172 and 63, respectively. assume that the population is normally distributed. a. with 99 confidence, what is the margin of error for the estimation of the population mean? b. construct the 99% confidence interval for the population mean. c. construct the 95% confidence interval for the population mean. d. construct the 83% confidence interval for the population mean. hint: you need to use excel function =t.inv.2t to find the value of t for the interval calculation.