Question

2.6 SW A local youth service agency has begun a sex education program for teenage girls who have been referred by the juvenile courts. The girls were given a 20-item test for general knowledge about sex, contraception, and anatomy and physiology upon admission to the program and again after completion of the program. The scores of the first 15 girls to complete the program are as follows. Case Pretest Posttest Case Pretest Posttest A 8 12 I 5 7 B 7 13 J 15 12 C 10 12 K 13 20 D 15 19 L 4 5 E 10 8 M 10 15 F 10 17 N 8 11 G 3 12 O 12 20 H 10 11 Construct frequency distributions for the pretest and posttest scores. Include a column for percent- ages. (HINT: There were 20 items on the test, so the maximum range for these scores is 20. If you use 10 class intervals to display these scores, the interval size will be 2. Since there are no scores of 0 or 1 for either test, you may state the first interval as 2-3. To make comparisons easier, both frequency distri- butions should have the same intervals.)

          2.6 SW A local youth service agency has begun a
sex education program for teenage girls who have
been referred by the juvenile courts. The girls were
given a 20-item test for general knowledge about
sex, contraception, and anatomy and physiology
upon admission to the program and again after
completion of the program. The scores of the first
15 girls to complete the program are as follows.
Case Pretest Posttest Case Pretest Posttest
A 8 12 I 5 7
B 7 13 J 15 12
C 10 12 K 13 20
D 15 19 L 4 5
E 10 8 M 10 15
F 10 17 N 8 11
G 3 12 O 12 20
H 10 11
Construct frequency distributions for the pretest
and posttest scores. Include a column for percent-
ages. (HINT: There were 20 items on the test, so the
maximum range for these scores is 20. If you use 10
class intervals to display these scores, the interval
size will be 2. Since there are no scores of 0 or 1 for
either test, you may state the first interval as 2-3.
To make comparisons easier, both frequency distri-
butions should have the same intervals.)

Show more…

2.6 SW A local youth service agency has begun a
sex education program for teenage girls who have
been referred by the juvenile courts. The girls were
given a 20-item test for general knowledge about
sex, contraception, and anatomy and physiology
upon admission to the program and again after
completion of the program. The scores of the first
15 girls to complete the program are as follows.
Case Pretest Posttest Case Pretest Posttest
A 8 12 I 5 7
B 7 13 J 15 12
C 10 12 K 13 20
D 15 19 L 4 5
E 10 8 M 10 15
F 10 17 N 8 11
G 3 12 O 12 20
H 10 11
Construct frequency distributions for the pretest
and posttest scores. Include a column for percent-
ages. (HINT: There were 20 items on the test, so the
maximum range for these scores is 20. If you use 10
class intervals to display these scores, the interval
size will be 2. Since there are no scores of 0 or 1 for
either test, you may state the first interval as 2-3.
To make comparisons easier, both frequency distri-
butions should have the same intervals.)

Added by Aaron W.

Elementary Statistics a Step by Step Approach

Allan G. Bluman 9th Edition

Instant Answer

Solved by Expert Paul A.

03/05/2022

Step 1

The lowest score is 10 and the highest score is 20. So, the range is 10. Show more…

Show all steps

lock

Thanks for your feedback!

A local youth service agency has begun a sex education program for teenage girls who have been referred by the juvenile courts. The girls were given a 20-item test for general knowledge about sex, contraception, and anatomy and physiology upon admission to the program and again after completion of the program. The scores of the first 15 girls to complete the program are as follows. Construct frequency distributions for the pretest and posttest scores. Include a column for percentages. (HINT: There were 20 items on the test, so the maximum range for these scores is 20. If you use 10 class intervals to display these scores, the interval size will be 2. Since there are no scores of 0 or 1 for either test, you may state the first interval as 2–3. To make comparisons easier, both frequency distributions should have the same intervals.)

Play audio

Feedback

Powered by NumerAI

Paul A. and 93 other subject Intro Stats / AP Statistics educators are ready to help you.

Ask a new question

Labs

Want to see this concept in action?

NEW

Explore this concept interactively to see how it behaves as you change inputs.

View Labs

Key Concepts

Recommended Videos

Recommended Textbooks

Transcript

00:02 Once again, welcome to a new problem.

00:06 This time we're dealing with frequencies and frequency distributions.

00:12 So when you think about a frequency distribution, you always want to have it in tabular form, either in tables or graphs.

00:22 So you're going to have a list of frequencies and specific outcomes.

00:29 The frequencies can be transformed into.

00:32 Decimals or they can also be transformed into percentages.

00:37 So you could have them as decimals or percentages.

00:43 And remember the frequency is the number of times an event happens.

00:50 So we have a youth center in the youth center.

00:53 It's a local youth center and it develops a sex education program for teenage girls.

01:01 And so the girls are given.

01:03 An 20 item test, a bunch of questions to respond to for the juvenile courts.

01:10 And the questions test their general knowledge on sex, contraception, anatomy, or physiology.

01:20 So these are the different areas that they're being tested on.

01:25 Of course, we have the pre -test and the post -test results, listed from a to o, so you have 1, 2, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15.

01:48 So this is the sample size.

01:49 These are the guys that you're dealing with.

01:52 And these are their responses...

Ace is your personal tutor. It breaks down any question with clear steps so you can learn.

Start Using Ace

Continue solving this problem

Create a free account to:

View full step-by-step solution
Ask follow-up questions with Ace AI
Save progress and study later