Does a statistics course improve a student's mathematics skills,as measured by a national test? Suppose a random sample of 13 students takes the same national mathematics exam prior to enrolling in a stats course and just after completing the course. At a 1% level of significance determine whether the scores after the stats course are significantly higher tha scores before. Take the differences - before - after. Before After 430 465 485 475 520 535 360 410 440 425 500 505 425 450 470 480 515 520 430 430 450 460 495 500 540 530 What type of alternative hypothesis is appropriate for this research question? O two-sided • one-sided Locate student9 in the dataset. What rank will be given to this student? 3 What is the value of the test statistic, T? Give answer to 1 decimal place. -1.9 1x What is the critical value for the study? (Hint: student 10 vill be dropped from the analysis, since the scores are the same before and after the stats class). 2.7 Are the exam scores significantly higher after the stats course? O Yes • No

Question
Does a statistics course improve a student's mathematics skills,as measured by a national test? Suppose a random sample of 13 students takes the same national mathematics exam prior to enrolling in a stats course and just after completing the course. At a 1% level of significance determine whether the scores after the stats course are significantly higher tha
scores before. Take the differences - before - after.
Before After
430
465
485
475
520
535
360
410
440
425
500
505
425
450
470
480
515
520
430
430
450
460
495
500
540
530
What type of alternative hypothesis is appropriate for this research question?
O two-sided
• one-sided
Locate student9 in the dataset. What rank will be given to this student? 3
What is the value of the test statistic, T? Give answer to 1 decimal place. -1.9
1x
What is the critical value for the study? (Hint: student 10 vill be dropped from the analysis, since the scores are the same before and after the stats class). 2.7
Are the exam scores significantly higher after the stats course?
O Yes
• No
Expand
Transcribed Image Text

Does a statistics course improve a student's mathematics skills,as measured by a national test? Suppose a random sample of 13 students takes the same national mathematics exam prior to enrolling in a stats course and just after completing the course. At a 1% level of significance determine whether the scores after the stats course are significantly higher tha scores before. Take the differences - before - after. Before After 430 465 485 475 520 535 360 410 440 425 500 505 425 450 470 480 515 520 430 430 450 460 495 500 540 530 What type of alternative hypothesis is appropriate for this research question? O two-sided • one-sided Locate student9 in the dataset. What rank will be given to this student? 3 What is the value of the test statistic, T? Give answer to 1 decimal place. -1.9 1x What is the critical value for the study? (Hint: student 10 vill be dropped from the analysis, since the scores are the same before and after the stats class). 2.7 Are the exam scores significantly higher after the stats course? O Yes • No

Expert Answer

Want to see the step-by-step answer?

Check out a sample Q&A here.

Want to see this answer and more?

Experts are waiting 24/7 to provide step-by-step solutions in as fast as 30 minutes!*

*Response times may vary by subject and question complexity. Median response time is 34 minutes for paid subscribers and may be longer for promotional offers.
Tagged in
Math
Statistics

Hypothesis Testing

Related Statistics Q&A

Find answers to questions asked by students like you.

Q: Fry Brothers Heating and Air Conditioning, Inc. employs Larry Clark and George Murnen to make servic...

A: Click to see the answer

Q: Let X be a normally distributed random variable with mean= 16 and standard deviation= 3. Find P(11 &...

A: Click to see the answer

Q: You intend to estimate a population mean with a confidence interval. You believe the population to h...

A: Solution: From the given information, n=13. The confidence level is 0.921.  

Q: A basketball player has a 0.52 probability of making a three-point shot. What is the probability tha...

A: Geometric distribution In series of Bernoulli trials, the random variable X denotes number of trials...

Q: Suppose a batch of metal shafts produced in a manufacturing company have a standard deviation of 1.3...

A: Given information Mean Diameter(µ) = 202 inches Standard deviation(σ) = 1.3 No of samples (n) = 70

Q: 4–38. If X is a normally distributed random variable with mean 120 and standarddeviation 44, find a ...

A: Click to see the answer

Q: ​In a test for significance of a Pearson correlation for a sample of n = 30 individuals, you determi...

A: Click to see the answer

Q: Questions 7-11. An online poll of 810 adults found that 53% of the respondents think critical thinki...

A: Click to see the answer

Q: You intend to estimate a population mean μ from the following sample. 35.9 51 45.2 56.2 56.1 48...

A: Obtain the 90% confidence interval to estimate the population mean.   The 90% confidence interval to...

Q: A botanist wishes to estimate the typical number of seeds for a certain fruit. She samples 66 specim...

A: Click to see the answer

Q: The percentage of adult users of the Internet who use Facebook has increased over time(Pew Research ...

A: Click to see the answer

Q: The average income of 15 randomly selected families who reside in a large metropolitan East Coast ci...

A: Step 1: Let µ1 be the true population average income of the families who live in the cities. Let µ2 ...

Q: On three rolls of a single die, you will lose $13 if a 5 turns up at least once, and you will win $6...

A: Click to see the answer

Q: For a random sample of 50 measurements of X1, sample mean x ̄1 = 200, sample standard deviation s1 =...

A: From provided information; n1=50, X̅1=200, σ1=10 n2=50, X̅2=190, σ2=15 1. (i)Assumptions for constru...

Q: A recent survey of 8 social networking sites has a mean of 13.1 million visitors for a specific mont...

A: Click to see the answer

Q: A researcher suspects that the actual prevalence of generalized anxiety among children and adolescen...

A: It is given that, the level of significance (alpha) is 0.05

Q: Please show working outs.

A: Click to see the answer

Q: A two factor research study has 2 levels of factor A and 3 of factor B with n=8 participants in each...

A: The number of levels of factor A is 2.

Q: 2–45. In problem 2–33, are “dividends paid” and “price increase” independent events? 2–33. An invest...

A: Since we only answer up to 3 sub-parts, we’ll answer the first 3. Please resubmit the question and s...

Q: Results from a Chembio test for hepatitis C among HIV-infected patients (based on data from a variet...

A: Click to see the answer

Q: 66% of students at one college drink coffee, and 13% of people who drink coffee suffer from  insomni...

A: Given: Probability of students who drink coffee = 0.66 Probability of students who drink coffee suff...

Q: An energy company wants to choose between two regions in a state to install​ energy-producing wind t...

A: a) The claim is that B) the wind speed in Region A is less than the wind speed in Region B.

Q: Express the confidence interval 210.5±104.1 in the form of a trilinear inequality.<μ<

A: Express the confidence interval in the form of tri-linear inequality. From the information, the give...

Q: The population mean and standard deviation are given below. Find the required probability and determ...

A: Click to see the answer

Q: Karen wants to advertise how many chocolate chips are in each Big Chip cookie at her bakery. She ran...

A: Obtain the 80% confidence interval for the number of chocolate chips per cookie for Big Chip cookies...

Q: In the 1992 presidential election, Alaska's 40 election districts averaged 2118 votes per district f...

A: Click to see the answer

Q: 6) The​ P-value for a hypothesis test is shown. Use the​ P-value to decide whether to reject H0   wh...

A: Given: P value = 0.0501 Level of significance a) α=0.01 b) α=0.05 c) α=0.10  

Q: A biologist found the wingspans of a group of monary butterflies to be normally distributed with a m...

A: Click to see the answer

Q: 41% of US asks have very little confidence in newspapers. you randomly select 10 US adults. find the...

A: Click to see the answer

Q: How many separate samples would be needed for a two-factor, independent-measures research study with...

A: Given, Level of factor A=3 Level of factor B=3   No of separate samples= Level of fator A * Level of...

Q: Find the critical​ value(s) and rejection​ region(s) for the indicated​ t-test, level of significanc...

A: Click to see the answer

Q: Please show working outs.

A: Click to see the answer

Q: Assume a population of 48, 52, 54, and 57. Assume that samples of size n=2 are randomly selected wit...

A: a.   From the given information,   Sample Median for each sample 48 48 48 54 48 ...

Q: Sarah Biele is a salesperson. During the last year she has kept records of her sales for last 200 da...

A: From the given information,   Sales 0 1 2 3 and 4   frequency 40 30 60 40 ...

Q: Express the confidence interval (0.037,0.091)in the form of ^p−E<p<^p+E.

A: Given information confidence interval (0.037,0.091)

Q: Assume a population of 2, 6, and 7. Assume that samples of size n=2 are randomly selected with repla...

A: From the provided information, n = 3 for population and n = 2 for sample. a) The required value of t...

Q: A certain beverage company provides a complete line of beer, wine, and soft drink products for distr...

A: Therefore, Item Price relative Beer 108.92 Wine 117 Soft Drink 110

Q: Using data from an actual study thát looked at the pulse rate for nearly 800 people to see whether i...

A: Part a: To compute the 95% confidence interval for the difference between the two means using the Ti...

Q: The lengths of pregnancies in a small rural village are normally distributed with a mean of 265 days...

A: Click to see the answer

Q: Help please

A: Click to see the answer

Q: In a two‑factor analysis of variance a main effect is defined as _____. Group of answer choices th...

A: In a two‑factor analysis of variance a main effect is defined as the mean differences among all trea...

Q: Assume that a sample is used to estimate a population mean μ. Find the margin of error M.E. that cor...

A: Click to see the answer

Q: Three randomly selected households are surveyed. The numbers of people in the households are 4, 5, a...

A: a.   From the given information,   Sample Number Sample Median for each sample 4 (4,4)...

Q: A department store has daily mean sales of $ 28,372.72. The standard deviation of sales is $2000. On...

A: Given information- Mean sales, μ = $ 28,372.72 Population standard deviation, σ = $2000 Tuesday’s sa...

Q: 1. A student earned grades of 84, 78, 84, and 72 on her four regular tests. She earned a grade of 78...

A: The number of grades scores is 4.

Q: Express the confidence interval 148.9±50.9 in interval form.Express the answer in either decimal for...

A: Express the confidence interval in the interval form. From the information, the given confidence int...

Q: A set of n = 15 pairs of scores (X and Y values) has SSX = 4, SSY = 25, and SP = 6. What is the Pear...

A: Click to see the answer