Answer:
80
Step-by-step explanation:
thank you so much for the points, have a great day.
Step-by-step explanation:
Total songs = 193
Probability of pop song = 39/193 = 0.202
Using the z-distribution, it is found that she should take a sample of 46 students.
<h3>What is a z-distribution confidence interval?</h3>
The confidence interval is:

The margin of error is:

In which:
is the sample mean.
is the standard deviation for the population.
In this problem, we have a 95% confidence level, hence
, z is the value of Z that has a p-value of
, so the critical value is z = 1.96.
Scores on the math portion of the SAT are believed to be normally distributed and range from 200 to 800, hence, by the Empirical Rule the standard deviation is found as follows:



The sample size is n when M = 29, hence:





n = 45.67.
Rounding up, a sample of 46 students should be taken.
More can be learned about the z-distribution at brainly.com/question/25890103
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2 3/4 divided by 7=0.39285714285
Hello.
k / 8 + 7 = 19, The value of k is 96.