Answer:
49
Step-by-step explanation:
48+ 5 = 53 divided by = 49
Answer:
The tabulated value is less than the calculated value, therefore we accept the null hypothesis and It show that there is a difference in the mean overall distance of brands.
Step-by-step explanation:
Answer:
c ???
Step-by-step explanation:
(Credit to guy/girl above) 63 miles 10 1/2 x 6 is 63.
Answer:
And the best option for this case would be:
a. (17.5, 21.7)
Step-by-step explanation:
Information given
represent the sample mean
population mean
represent the population deviation
n=42 represent the sample size
Confidence interval
The confidence interval for the mean is given by the following formula:
(1)
The degrees of freedom, given by:
Since the Confidence is 0.98 or 98%, the significance would be and , and the critical value would be
Replacing we got:
And the best option for this case would be:
a. (17.5, 21.7)