Answer: 1.9166
Step-by-step explanation:
Let be the population mean.
By considering the given description, we have
n=20
s=7
Since, the population standard deviation is unknown , so we use t-test.
Test statistic :
i.e .
[Rounded to four decimal places.]
Hence, the value of the t-test statistic : 1.9166
Answer:
x=20
Step-by-step explanation:
Because all angles of a triangle add up to 180, by adding all the values that your given and setting it equal to 180, you get the value of x.
3x+2x+20+4x-20=180
9x=180
x=20
Answer:
Scalene, right angle, and what again you want me to say?
Answer:
0.118 is the probability someone will spend no more than 30 minutes reading online national news reports.
Step-by-step explanation:
We are given the following information in the question:
Mean, μ = 49 minutes
Standard Deviation, σ = 16 minutes
We are given that the distribution of time an individual reads is a bell shaped distribution that is a normal distribution.
Formula:
P(no more than 30 minutes)
Calculation the value from standard normal z table, we have,
0.118 is the probability someone will spend no more than 30 minutes reading online national news reports.