A study was done by an online retail store to determine the rate at which users used its website. A graph of the data that was c
ollected is shown:
A. The range represents the 54 month time period of the study.
B. The range represents the 36 month time period of the study.
C. The range represents the number of users each month for 36 months.
D. The range represents the number of users each month for 54 months.
A. The range represents the 54 month time period of the study.
B. The range represents the 36 month time period of the study.
C. The range represents the number of users each month for 36 months.
D. The range represents the number of users each month for 54 months.
1 answer:
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Total hours of hiking is 15.12 miles
Time taken is 6.3 hours
The number of miles hiked per hour would be
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=2.4 miles
So Megan has hiked 2.4 miles every hour
Answer:
The critical value of <em>z</em> for 99% confidence interval is 2.5760.
The 99% confidence interval for population mean number of lightning strike is (7.83 mn, 8.37 mn).
Step-by-step explanation:
Let <em>X</em> = number of lightning strikes on each day.
A random sample of <em>n</em> = 23 days is selected to observe the number of lightning strikes on each day.
The random variable <em>X</em> has a sample mean of, and the population standard deviation,
.
The (1 - <em>α</em>)% confidence interval for population mean <em>μ</em> is:
Compute the critical value of <em>z</em> for 99% confidence interval is:
*Use a <em>z</em>-table.
The critical value of <em>z</em> for 99% confidence interval is 2.5760.
Compute the 99% confidence interval for population mean number of lightning strike as follows:
Thus, the 99% confidence interval for population mean number of lightning strike is (7.83 mn, 8.37 mn).
The 99% confidence interval for population mean number of lightning strike implies that the true mean number of lightning strikes lies in the interval (7.83 mn, 8.37 mn) with 0.99 probability.