The cell phone bill recorded that Jeremiah sent 532 text messages last week. On average
2 answers:
Answer:
76 sent text messages per day.
Step-by-step explanation:
The question above is answered below.
Average of a dataset is obtained by the ratio of total sum of dataset and number of observations.
In this case, average text messages sent equals total sent text messages divide by number of days in a week. Thus:
Having recorded 532 sent text messages last week; on average, Jeremiah sent 76 text messages each day.
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Answer:
A. 491.775
B. 488.37
C. 484.55
Step-by-step explanation:
A. 100-95 = 5
thus
using the formula;
where X = 500
μ = mean
σ = 5 (standard deviation)
= 500 - 1.645(5)
= 491.775
(please note that = 1.645 from the standard normal distribution table )
B. similarly, following the above method we have
100 - 99 = 1
1/100 = 0.01
from the standard normal distribution table
μ = X - σ
= 500 - 2.326(5)
= 488.37
C. 100 - 99.9 = 0.1
0.1/100 = 0.001
from the standard normal distribution
μ = X - σ
= 500 - 3.09(5)
= 484.55