Question

A school psychologist was interested in whether the 12 students in the chess club had a...

A school psychologist was interested in whether the 12 students in the chess club had a higher or lower mean grade point average (GPA) than the other students at a school. The overall GPA at the school was 2.55 with a standard deviation of 0.5; the distribution of GPAs was approximately normal. The average GPA of students in the chess club was 2.76. Using the .05 significance level, did the chess club represent a population that was different from students in general at this school?

Math   Statistics-And-Probability   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
A psychologist was interested in whether eccentric students scored above or below the mean grade point...
A psychologist was interested in whether eccentric students scored above or below the mean grade point average (GPA) at a high school. She figured the average GPA at the school to be 2.55 with a standard deviation of .5 and noted that the distribution was approximately normal. She then figured the average GPA for 15 students regarded as eccentric by their classmates. Their mean GPA was 2.76. Use the 5 steps of hypothesis testing at the .01 significance level. Assuming...
Suppose grade point averages are normally distributed. We are interested in whether smokers have different gpa’s...
Suppose grade point averages are normally distributed. We are interested in whether smokers have different gpa’s than non-smokers. We know that non-smokers have a mean gpa of 3.1. You take a sample of 16 smokers and find they have a mean gpa of 3.38 with standard deviation of .021. a. Suppose you wanted to test whether the gpas of the two groups different. • write down the null and alternative hypotheses • Construct the test statistic. What is the distribution...
Suppose grade point averages are normally distributed. We are interested in whether smokers have different gpa’s...
Suppose grade point averages are normally distributed. We are interested in whether smokers have different gpa’s than non-smokers. We know that non-smokers have a mean gpa of 3.1. You take a sample of 16 smokers and find they have a mean gpa of 3.38 with standard deviation of .021. a. Suppose you wanted to test whether the gpas of the two groups different. • write down the null and alternative hypotheses • Construct the test statistic. What is the distribution...
You are a school psychologist interested in whether a new educational program, Go4It, improves SAT scores...
You are a school psychologist interested in whether a new educational program, Go4It, improves SAT scores in senior high school students. After implementing the educational program in an SAT course at Park High School, you obtain the students’ SAT scores (n = 10). You want to know whether SAT scores from your sample of students, who were enrolled in the Go4It program, are different from the population of SAT scores. You have access to SAT scores for all senior high...
A dean of a business school is interested in determining whether the mean grade point average...
A dean of a business school is interested in determining whether the mean grade point average (GPA) of students is different from 3.04. The population standard deviation is 0.41. A random sample of 200 students indicates a sample mean GPA of 2.94. A test is conducted at the 0.05 level of significance to determine whether the mean grade point average (GPA) of students is different from 3.04. What is the test statistic value in this test? Select one: a. -0.244...
A school psychologist is interested in whether time has changed the problem with student parking that has been discussed for a few years.
A school psychologist is interested in whether time has changed the problem with student parking that has been discussed for a few years. As the student population has grown the psychologist fully suspects that the time to find parking has become worse rather than better for the student body. Over the past decade the average amount of time to find parking for students is 15 minutes (µ=15). The current sample’s information is as follows: M=19 minutes and a S= 6...
1. A dean of a business school is interested in determining whether the mean grade point...
1. A dean of a business school is interested in determining whether the mean grade point average (GPA) of students is less than 3.04. The population standard deviation is 0.41 A random sample of 200 students indicates a sample mean GPA of 2.94. A test is conducted at the 0.05 level of significance to determine whether the mean grade point average (GPA) of students is less than 3.04. What are the most appropriate null and alternative hypotheses for this test?...
You are interested in whether a study intervention significantly affects students’ grades on a statistics exam....
You are interested in whether a study intervention significantly affects students’ grades on a statistics exam. You recruit a sample of 36 students from a normally distributed population with µ = 75 and s = 7.5. You chose an alpha level of .05 and perform a two-tailed hypothesis test. After participating in the study intervention, the students’ statistics exam average is 79. Perform a z-test to determine whether the study intervention significantly affected students’ exam grades. (0.5 points) a) After...
A researcher wants to determine whether high school students who attend an SAT preparation course score...
A researcher wants to determine whether high school students who attend an SAT preparation course score significantly different on the SAT than students who do not attend the preparation course. For those who do not attend the course, the population mean is 1050 (? = 1050). The 16 students who attend the preparation course average 1150 on the SAT, with a sample standard deviation of 300. On the basis of these data, can the researcher conclude that the preparation course...
A researcher was interested in how students’ Graduate Record Examinations scores (GREQ- Quantitative and GREV-Verbal) predict...
A researcher was interested in how students’ Graduate Record Examinations scores (GREQ- Quantitative and GREV-Verbal) predict college students’ graduate school Grade Point Average (GGPA). He collects data from 30 college students. The GRE Quantitative (X1) and GRE Verbal (X2) scores can range from 400-1600 (Note. This is the old GRE score scale). GGPA (Y) can range from 0.00 to 4.00. f. What proportion of variance in graduate grade point average cannot be accounted by the variability in the quantitative GRE...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT