The compressive strength of concrete is normally distributed with psi and psi. a random sample of n equals 4 specimens is collected. what is the standard error of the sample mean? round your final answer to three decimal places (e. g. 12.345). the standard error of the sample mean is

explanation:

infrared radiation has wavelength in the range between 700 nm and 1 mm. lets' convert these values into scientific notation, keeping in mind that:

let's start from the lower value, we have:

(we moved the dot two places to the left, so we increased the exponent by 2 units, from -9 to -7)

the higher value is:

so, the range of wavelength of infrared radiation is:

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