3. Fernanda runs a large bowling league. She suspects that the league average score is greater than 155 per game. She takes a random sample of 40 game scores from the
league data. The scores in the sample have a mean of 158 and a standard deviation of
30. Fernanda wants to use these sample data to conduct a t-test on the mean. Assume
that all conditions for inference have been met. Calculate the t-test statistic.
Answer the following:
a. (1 pt) population mean,
b. (1 pt) sample mean, X
c. (1 pt) sample standard error, sx
d. (1 pt) sample size, n
e. (2 pts) calculate the t-test statistic

Jeffery conducted a survey in his school and found that 30 of the 50 eighth grade students' favorite subject is mathematics. based on the results, jeffery concluded that out of the 200 students in his school, 120 students' favorite subject is mathematics. select the statement that is true about jeffery's conclusion. a. jeffery's conclusion is not valid because the sample was biased since only 200 students were surveyed. b. jeffery's conclusion is valid because the sample was random since all of the students were eighth grade students. c. jeffery's conclusion is valid because the sample was random. d. jeffery's conclusion is not valid because the sample was biased since all of the students were eighth grade students.

Which is f(5) for the function –2x2 + 2x - 3?

If abcde is reflected over the x-axis and then translated 3 units left, what are the new coordinates d?