Determine confidence interval for the population mean
A local health care company wants to estimate the mean weekly elder day care cost. A sample of 10 facilities shows a mean of $250 per week with a standard deviation of $25. What is the 90 percent confidence interval for the population mean?
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What is the probability that the difference between the sample mean and the population mean is less than 0.01? What is the likelihood the sample mean is greater than $3.60?
Nile Superstore is conducting a survery of consumer preferences for a new wireless, e-book reader. 160 people reveals that 120 would buy the new reader. What is the 99 percent confidence interval population proportion?
The input signal at the antenna input of a digital radio receiver is 1 microvolt rms. Assume the receiver input impedance is 50 ohms and purely resistive (Z=50+j0), and the gain of the receiver from antenna to output is 120 dB or a voltage gain of
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Find critical value show problem. Compute the Z ot t value of the sample test statistic showing problem
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