The national average on a reading test is 72. The average for a sample of 80 students in a certain geographical region who took the exam is 70. Is the average test score for students in this region statistically different from the national average? Find the P-value for the test. Assume a population standard deviation of 13.
Group of answer choices
0.0210
0.0419
0.1676
0.0838
0.3352
In: Statistics and Probability
In: Statistics and Probability
find the following critical t-scores
Near the beginning of the semester, you administered a survey to 10 students. Suppose we wanted to use your sample to calculate the mean age of college students. What are the critical t-scores for the mean age using your sample?
80% CI: t =
90% CI: t =
99% CI: t =
In: Statistics and Probability
When 500 college students were surveyed, 30% said that they own their car. Construct a 95% confidence interval for the proportion of college students who say they own their cars. DON'T JUST GIVE THE ANSWER - SHOW WORK AND EXPLAIN YOUR PROCESS EACH STEP OF THE WAY SO THAT I CAN FOLLOW WHAT YOU DID AND CHECK YOUR WORK
In: Statistics and Probability
Perform a common analysis used to compare means for Exam Anxiety in students: Once you have retrieved your data set, go to Analyze, then Compare Means, then Independent Samples t-test. Conduct a compare means analysis using an independent samples t-test in SPSS. The grouping variable for Exam Anxiety in students will be gender, grouped as (1, 2).
In: Statistics and Probability
Professor Harde assumes that test scores are normally distributed and wants to grade "on the curve." The mean score was 58, with a standard deviation of 14. (Round your answers to the nearest whole number.)
(a) If she wants 15% of the students to receive an A, find the
minimum score to receive an A.
(b) If she wants 22% of the students to receive a B, find the
minimum score to receive a B.
In: Statistics and Probability
1. Assume that female students’ heights are normally distributed with a mean given by µ = 64.2 in. and a standard deviation given by σ =2.6 in.
a) If one female student is randomly selected, find the probability that her height is between 64.2 in. and 66.2 in.
b) If 25 female students are randomly selected, find the probability that they have a mean height between 64.2 in. and 66.2 in.
In: Statistics and Probability
At a high school, past records indicate that the MSAT scores of students have a mean of 510 and a standard deviation of 90. One hundred students in the high school are to take the test. What is the probability that the sample mean score will be (a) within 10 of the population mean? (b) less than 500? (c) between 495 and 515 (d) more than 530?
In: Statistics and Probability
A. The average SAT score of students is 1110, with a standard deviation ≈ 120.
If a sample of n = 25 students is selected, what is the probability that the sample mean would be > 1150? That is, what is p(M>1150)?
B. Which of the following will decrease statistical power? SELECT ALL THAT APPLY.
a smaller sample size
a larger effect size
a larger standard deviation
a larger alpha
In: Statistics and Probability
In problem-based learning, the teachers present the problem to the students and encourages them to investigate and find solutions on their own. An atmosphere of intellectual freedom is fostered and students must be active participants in solving the problem. Why do you think more teachers do not use this approach to teaching social studies in their classroom? Post must be between 400-500 words
In: Operations Management