Scenario: A teacher asked his students how much time they spent studying for their statistics exam....

Scenario: A teacher asked his students how much time they spent studying for their statistics exam. The results (in minutes) were: 222 161 239 135 209 179 222 201 228 222 235 228 179 47 238 150 99 201 10. Was the median equal to one of the times that was included in the data? Why. 11. For this example, which measure of central tendency would be the most appropriate measure to report? Why. 12. What is the standard abbreviation for the mean when reporting the findings in an article? 13. What is a standard abbreviation for the median when reporting the findings in an article? 14. What is the relationship between the standard deviation and variance? 15. What is a standard abbreviation to the standard deviation? 16. Write a statement as it might appear in an article that reports the measures of central tendency and variability.

Expert Solution

orchestra answered 1 year ago

A teacher is interested in the relationship between the time spent studying for an exam and...

A teacher is interested in the relationship between the time spent studying for an exam and exam score. The table lists scores for 5 students. The value of b0 = 67.91 and the value of b1 = 0.75 Hours studied 5 18 3 15 17 Exam score 63 87 79 72 82 . Step 4 of 6 : Calculate the Coefficient of Determination (R2). Round answer to four decimal places.

A sample of college students was asked how much they spent monthly on coffee. Approximate the...

A sample of college students was asked how much they spent monthly on coffee. Approximate the standard deviation for the cost. Monthly coffee cost ($) Number of students 10.00-19.99 6 20.00-29.99 20 30.00-39.99 . 23 40.00-49.99 18 50.00-59.99 . 6 The sample standard deviation for the cost is (Round to the nearest cent as needed.)

A sample of college students was asked how much they spent monthly on pizza. Approximate the...

A sample of college students was asked how much they spent monthly on pizza. Approximate the standard deviation for the cost. Monthly pizza cost. total number of students 10.99-19.99 7 20.99-29.99 20 30.99-39.99 23 40.99-49.99 20 50.99-59.99 5 The sample standard deviation for the cost is (round to nearest cent)

A study was conducted to determine if the number of hours spent studying for an exam...

A study was conducted to determine if the number of hours spent studying for an exam is associated with the exam score. The following are the observations obtained from a random sample of 5 students: Number of Hours Spent Studying (X) 8 2 6 4 2 Exam Score (Y) 98 74 87 82 72 The average number of hours spent studying for an exam is _____. Part A: A) 82.6 B) 22 C) 4.4 D) 413 The average exam score...

A statistics teacher believes that the final exam grades for her business statistics class have a...

A statistics teacher believes that the final exam grades for her business statistics class have a normal distribution with a mean of 82 and a standard deviation of 8. (1)Find the score which separates the top 10% of the scores from the lowest 90% of the scores. (2) The teacher plans to give all students who score in the top 10% of scores an A. Will a student who scored a 90 on the exam receive an A? Explain. (3)...

We have a class of 10 students who all spent different amounts of time studying for...

We have a class of 10 students who all spent different amounts of time studying for a quiz. The number of minutes each student studied is listed in the table below. Calculate the standard deviation of the class study time. Remember this is a population, not a sample. Round your answer to the nearest whole minute. Student Minutes of Studying Student 1 82 Student 2 110 Student 3 103 Student 4 106 Student 5 108 Student 6 80 Student 7...

A teacher is comparing the mean study time of his freshmen and senior students. he believes...

A teacher is comparing the mean study time of his freshmen and senior students. he believes that his senior students spend more time studying per week than his freshmen students and decides to perform a hypotheses test on this belief. a. suppose the decision of the hypothesis test is to reject the null hypothesis. If in reality freshmen study for a mean of 10 hours per week and seniors study for a mean of 15 hours per week, was an...

Scenario A. A professor is interested in studying how sleep influences exam performance. She instructs her...

Scenario A. A professor is interested in studying how sleep influences exam performance. She instructs her students to sleep for 8 hours before exam 1, to sleep for 4 hours before exam 2, and to not sleep at all before exam 3 and then compares exam scores. 1. What is the independent variable? 2. How many levels are there for the independent variable? 3. What is the dependent variable? 4. What is the confound? Scenario B. A researcher is interested...

The number of hours 10 students spent studying for a test and their scores on that...

The number of hours 10 students spent studying for a test and their scores on that test is represented in the table below. Hours spent studying, x 0 2 4 5 5 5 6 7 8 9 Test scores, y 40 51 64 69 73 75 93 90 95 95 7) What amount of the variance in test score (y) do the hours spent studying (x) account for this sample? (r2 =?) Interpret the result in the context of the...

The number of hours 1010 students spent studying for a test and their scores on that...

The number of hours 1010 students spent studying for a test and their scores on that test are shown in the table. Is there enough evidence to conclude that there is a significant linear correlation between the data? Use alphaαequals=0.050.05. Hours, x 00 11 22 44 44 55 55 66 77 88 Test score, y 4141 4040 5555 5656 6464 6666 7575 7878 8181 9797 LOADING... Click here to view a table of critical values for Student's t-distribution. Setup...

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