Approximately 59% of films are rated R. if 930 films were recently rated, how many were rated R?
2 answers:
Answer:
About 549
Step-by-step explanation:
You have to set it up as a proportion, setting the percent and the number of movies equal.
X - Number of R-Rated movies.
Now, cross multiply, multiplying the numerator of the left and the denominator to the right, and vice versa.
Now, solve the inequality.
Now, round up.
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Answer:
Option B)
Step-by-step explanation:
We are given the following in the question:
Hypothesis:
The doctors and u=instructor claims that practicing yoga reduces blood pressure and hence is beneficial to people.
Population mean, μ = 140 mm
Sample mean, = 139 mm
Sample size, n = 51
Sample standard deviation, s = 5 mm
Thus, we can design the null hypothesis and alternate hypothesis as
The null hypothesis states that the population have a blood pressure of 140 mm. The alternate hypothesis states that yoga reduces the blood pressure and the sample has a blood pressure less than 140 mm.
Thus, the correct answer is
Option B)