Write the number 33×10^-3 in scientific notation

Mathematics

1 answer:

cluponka [151]3 years ago

4 0

Answer:

Step-by-step explanation:

33×10^-3 is equivalent to 33/1000, or 0.033.

This, in turn, is equivalent to 3.3×10^(-2) (which is in scientific notation)

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In a recent study of 42 eighth graders, the mean number of hours per week that they watched television was 19.6. Assume the popu

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And the best option for this case would be:

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Step-by-step explanation:

Information given

$\bar X= 19.6$ represent the sample mean

$\mu$ population mean

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n=42 represent the sample size

Confidence interval

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The degrees of freedom, given by:

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Since the Confidence is 0.98 or 98%, the significance would be $\alpha=0.02$ and $\alpha/2 =0.1$ , and the critical value would be $t_{\alpha/2}=2.42$