A manufacturer claims that the calling range (in feet) of its 900-MHz cordless telephone is greater than that of its leading competitor. A sample of 1313 phones from the manufacturer had a mean range of 10901090 feet with a standard deviation of 2121 feet. A sample of 99 similar phones from its competitor had a mean range of 10301030 feet with a standard deviation of 4242 feet. Do the results support the manufacturer's claim? Let μ1�1 be the true mean range of the manufacturer's cordless telephone and μ2�2 be the true mean range of the competitor's cordless telephone. Use a significance level of α=0.05�=0.05 for the test. Assume that the population variances are equal and that the two populations are normally distributed. Step 2 of 4 : Compute the value of the t test statistic. Round your answer to three decimal places.
A manufacturer claims that the calling
Compute the value of the t test statistic. Round your answer to three decimal places.
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