Question

During a given year, high school students earned a mean of $1359. Assume that a sample...

During a given year, high school students earned a mean of $1359. Assume that a sample consisting of 45 students at a school was found to have earned a mean of $1382 with a standard deviation of $210. Would a hypothesis test at the 0.01 significance level suggest that the average earnings of this school were significantly higher than the national mean? Formulate the alternative and null hypotheses and do the necessary steps for hypothesis testing. Use critical values to obtain a conclusion.

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 researcher claims that high-school students exercise an average (mean) of 8 hours per week. (You...
A researcher claims that high-school students exercise an average (mean) of 8 hours per week. (You think that the number is actually higher.) From a sample of 40 students, you find a mean of 9 hours with a sample standard deviation of 1 hour. Conduct a hypothesis test using a 5% significance level. a) What are the null and alternative hypotheses? b) What is the test statistic? c) What is the p-value? d) Do your reject the null hypothesis? Explain...
E-Cigs According to the Centers for Disease Control and Prevention, 2.8% of high school students currently...
E-Cigs According to the Centers for Disease Control and Prevention, 2.8% of high school students currently use electronic cigarettes. A high school counselor is concerned the use of e-cigs at her school is higher. (a) Determine the null and alternative hypotheses. (b) If the sample data indicate that the null hypothesis should not be rejected, state the conclusion of the school counselor. (c) Suppose, in fact, that the proportion of students at the counselor’s high school who use electronic cigarettes...
Is it true that the mean age of students at North Campus is 25 year old?...
Is it true that the mean age of students at North Campus is 25 year old? In a survey of 70 students at North Campus, the sample mean age was found to be 24.96, with a standard deviation s = 8.04. Using a .03 significance level, test the claim that mean age of students at North Campus is equal to 25. Show all steps in the hypothesis testing procedure. Clearly enumerate the null and alternative hypotheses. Show calculation of test...
A standardized test for high school students is given to a random sample of 16 students....
A standardized test for high school students is given to a random sample of 16 students. The average time required to finish the test for the students in the sample is recorded as 48 minutes with a standard deviation of 6 minutes. We want to evaluate the null hypothesis that the time required to finish the test for the whole population of high school students is at most 45 minutes on average.
A random sample of 100 students at a high school was asked whether they would ask...
A random sample of 100 students at a high school was asked whether they would ask their father or mother for help with a financial problem. A second sample of 100 different students was asked the same question regarding a dating problem. If 43 students in the first sample and 47 students in the second sample replied that they turned to their mother rather than their father for help, test the hypothesis of no difference in the proportions. Use α...
A random sample of 100 students at a high school was asked whether they would ask...
A random sample of 100 students at a high school was asked whether they would ask their father or mother for help with a financial problem. A second sample of 100 different students was asked the same question regarding a dating problem. If 43 students in the first sample and 47 students in the second sample replied that they turned to their mother rather than their father for help, test the hypothesis of no difference in the proportions. Use α...
A recent national survey found that high school students watched an average (mean) of 7.6 DVDs...
A recent national survey found that high school students watched an average (mean) of 7.6 DVDs per month with a population standard deviation of 0.5 hours. The distribution of times follows the normal distribution. A random sample of 61 college students revealed that the mean number of DVDs watched last month was 7.0. At the 0.01 significance level, can we conclude that college students watch fewer DVDs a month than high school students? Use α = 0.01. a. State the...
Solve in steps The mean yearly salary for high school teachers in Texas is $48,723. Suppose...
Solve in steps The mean yearly salary for high school teachers in Texas is $48,723. Suppose that a random sample of 50 teachers in a specific district has a mean offer of $49,840 and a standard deviation of $3700. Do the sample data provide strong support for the claim that mean salary for the district is higher than the state average? Test the relevant hypotheses using a = 0.05 Step 1: Null Hypothesis and Alternative Hypothesis Step 2: Value for...
Five years? ago, 10.3?% of high school students had tried marijuana for the first time before...
Five years? ago, 10.3?% of high school students had tried marijuana for the first time before the age of 13. A school resource officer? (SRO) thinks that the proportion of high school students who have tried marijuana for the first time before the age of 13 has increased since then. ?(a) Determine the null and alternative hypotheses. Which of the following is? correct? A. Upper H 0?: pequals0.103?; Upper H 1?: pgreater than0.103 B. Upper H 0?: pequals0.103?; Upper H...
5. Teaching Methods in a High School A high school language course is given in two...
5. Teaching Methods in a High School A high school language course is given in two sections, each using a different teaching method. The first section has 21 students, and the grades in that section have a mean of 82.6 and a standard deviation of 8.6. In the second section, with 43 students, the mean of the grades is 85.2, with a standard deviation of 7.9. At alpha=0.05, test the hypothesis that the method used in second section is more...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT