Question

A researcher wants to test to see if a population mean is different from 6. Based...

A researcher wants to test to see if a population mean is different from 6. Based on a sample of size 33 the sample mean is 6.3, and the sample standard deviation is 1.1. Use a 5% significance level to carry out the appropriate hypothesis test.

The critical values of the test statistic that divide the rejection and non-rejection regions are ± what value?

What is the value of the test statistic for the previous problem?   Round your answer to 2 decimal places.

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 wants to test to see if a population mean is different from 6. Based...
A researcher wants to test to see if a population mean is different from 6. Based on a sample of size 33 the sample mean is 6.3, and the sample standard deviation is 1.1. Use a 5% significance level to carry out the appropriate hypothesis test. The critical values of the test statistic that divide the rejection and non-rejection regions are plus-or-minus what value? What is the value of the test statistic?   Round your answer to 2 decimal places.
A researcher wants to test if the mean annual salary of all lawyers in a city...
A researcher wants to test if the mean annual salary of all lawyers in a city is different from $110,000. A random sample of 51 lawyers selected from the city reveals a mean annual salary of $105000. Assume that σ=$20000, and that the test is to be made at the 2% significance level. What are the critical values of z? -1.645 and 1.645 -1.28 and 1.28 -2.33 and 2.33 -2.05 and 2.05 What is the value of the test statistic,...
The average cholesterol level in the general US population is 189 mg/dL. A researcher wants to...
The average cholesterol level in the general US population is 189 mg/dL. A researcher wants to see if the average cholesterol for men in the US is different from 189 mg/dL. She takes a sample of 81 American males and finds a sample mean of 194 mg/dL and a sample standard deviation of 10.4 What is the 90% confidence interval? What is the correct interpretation of the confidence interval from question 11? Are the assumptions met? Explain. Conduct a hypothesis...
To test H0: μ=100 versus H1: μ≠100, a simple random sample size of n=24 is obtained...
To test H0: μ=100 versus H1: μ≠100, a simple random sample size of n=24 is obtained from a population that is known to be normally distributed. A. If x=105.8 and s=9.3 compute the test statistic. B. If the researcher decides to test this hypothesis at the a=0.01 level of significance, determine the critical values. C. Draw a t-distribution that depicts the critical regions. D. Will the researcher reject the null hypothesis? a. The researcher will reject the null hypothesis since...
The management of ABC Ltd. wants to determine whether there is a significant difference in the...
The management of ABC Ltd. wants to determine whether there is a significant difference in the average length of time (in minutes) employees spent on social media every day within its two regions. The following data has been accumulated for this test: Region 1 Region 2 Sample Mean 22.5 16.4 Sample Standard Deviation 10.5 12.3 Sample Size 44 43 1.   What are the null and alternative hypothesis if we want to determine whether the average length of time employees spent on...
A medical researcher wants to compare the pulse rates of smokers and non-smokers. He believes that...
A medical researcher wants to compare the pulse rates of smokers and non-smokers. He believes that the pulse rate for smokers and non-smokers is different and wants to test this claim at the 0.05 level of significance. A sample of 72 smokers has a mean pulse rate of 75, and a sample of 81 non-smokers has a mean pulse rate of 72. The population standard deviation of the pulse rates is known to be 6 for smokers and 9 for...
A researcher wants to test H 0 : σ = 1.45 versus H 1 : σ...
A researcher wants to test H 0 : σ = 1.45 versus H 1 : σ > 1.45 for the standard deviation in a normally distributed population. The researcher selects a simple random sample of 20 individuals from the population and measures their standard deviation as s = 1.57. Find the test statistic: (round to 3 decimal places) χ 0 2 = Find the critical value(s) for a 0.01 significance level: (round to 3 decimal places) χ α 2 =...
Previous studies claimed that the population mean DailyReadTime among subjects is 145 minutes, with a population...
Previous studies claimed that the population mean DailyReadTime among subjects is 145 minutes, with a population standard deviation of 25 minutes. Based on the data, conduct a hypothesis test BY HAND (with a 1% significance level) to see if there is evidence that the population mean DailyReadTime is greater than 145 minutes. Sample size is 150. Write down your null and alternative hypotheses. Be sure to use appropriate notation. Calculate the test statistic and give the probability statement for the...
We have a left tail one sample test for the population mean. Assume the null hypothesis...
We have a left tail one sample test for the population mean. Assume the null hypothesis is true. Use 4% for the significance level. The sample size is 27, the sample mean is 32.8, the sample standard deviation is 4.1, and the null mean is 35. The test result is (a) a correct decision (b) a Type I error (c) a Type II error 3. The test statistic value for the previous problem is
A medical researcher wants to compare the pulse rates of smokers and non-smokers. He believes that...
A medical researcher wants to compare the pulse rates of smokers and non-smokers. He believes that the pulse rate for smokers and non-smokers is different and wants to test this claim at the 0.1 level of significance. A sample of 76 smokers has a mean pulse rate of 79, and a sample of 62 non-smokers has a mean pulse rate of 76. The population standard deviation of the pulse rates is known to be 7 for smokers and 8 for...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT