Question

Use the information below for the next set of questions. In the following study, a single...

Use the information below for the next set of questions.

In the following study, a single sample's mean is being compared to a population with a known mean but an unknown variance. Decide whether the result is significant.

Sample size (N)=16

Population mean (μ)= 100.31

Estimated Population Standard Deviation (S)= 2.00

Sample Mean (M)=100.98

Tails= 1 (high predicted)

Significance level (α)=.05

1. What is the null hypothesis for this​ test?

A. The mean for the first population (the population from which the sample is​ taken) is the same​ as, or greater​ than, the mean for the second (known) population​.

B. The mean for the first population (the population from which the sample is​ taken) is different than the mean for the second (known) population​

C. The mean for the first population (the population from which the sample is​ taken) is the same​ as, or less​ than, the mean for the second (known) population.​

D. The mean for the first population (the population from which the sample is​ taken) is the same as the mean for the second (known) population.​

2. What is the research hypothesis for this​ test?

A. The mean for the first population (the population from which the sample is​ taken) is greater than the mean for the second (known) population​.

B. The mean for the first population (the population from which the sample is​ taken) is different than the mean for the second (known) population​.

C. The mean for the first population (the population from which the sample is​ taken) is the same​ as, or greater​ than, the mean for the second (known) population​.

D. The mean for the first population (the population from which the sample is​ taken) is less than the mean for the second (known) population​.

3. Determine the cutoff sample​ score(s).

The cutoff sample​ score(s) is(are) ______.

4. Determine the t score.

(write you answer to two decimal places).

t = _____.

5. Decide whether the result is significant. Choose the correct answer below.

A. The result is not significant because the t score is more extreme than the cutoff sample score.

B. The result is significant because the t score is less extreme than the cutoff sample score.

C. The result is significant because the t score is more extreme than the cutoff sample score.

D. The result is not significant because the t score is less extreme than the cutoff sample score.

Homework Answers

Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
Which of the following is different for a t test for a single sample compared to...
Which of the following is different for a t test for a single sample compared to a Z test for a single sample (hypothesis testing with a population with a known μ and σ2)? Group of answer choices: The way you restate the problem as a research hypothesis and a null hypothesis about the populations. The way you determine the mean of the known population. The way you determine the variance of the known population. The way you decide whether...
A hospital administrator finds that the mean hospital stay for a sample of 86 women after...
A hospital administrator finds that the mean hospital stay for a sample of 86 women after childbirth is 2.9 days. She claims that the mean stay at her hospital is greater than the national average of 2.4 days. Assuming that the average at her hospital is the same as the national​ average, the probability of observing a sample with a mean of 2.9 days or more is 0.17 Formulate the null and alternative hypotheses. Then discuss whether the sample provides...
A hospital administrator finds that the mean hospital stay for a sample of 86 women after...
A hospital administrator finds that the mean hospital stay for a sample of 86 women after childbirth is 2.9 days. She claims that the mean stay at her hospital is greater than the national average of 2.4 days. Assuming that the average at her hospital is the same as the national​ average, the probability of observing a sample with a mean of 2.9 days or more is 0.17 Formulate the null and alternative hypotheses. Then discuss whether the sample provides...
For each of the single sample t-tests below (problem 1-3), please include: 1) The null and...
For each of the single sample t-tests below (problem 1-3), please include: 1) The null and alternative hypotheses (can be written in notation or as a sentence) 2) Calculate (show all work): a) The estimated population variance b) The variance of the distribution of means c) The standard deviation of the distribution of means 3) Degrees of freedom 4) The cutoff sample score on the comparison distribution at which the null hypothesis should be rejected (cutoff scores) 5) The sample’s...
Use the following information for the next 7 questions: A simple random sample of 50 adults...
Use the following information for the next 7 questions: A simple random sample of 50 adults is obtained and each person's red blood cell count (in cells per microfilter) is obtained. The sample mean in 4.63. The population standard deviation for all blood cell counts is assumed to be 0.54. Test at the .05 level whether the population mean blood count is less than 5. Question 8: The data summary here is n=50 and x= 4.63 A. s= 0.54 B....
2. The researchers then decide to investigate whether employees working under sub-standard conditions experience greater workplace...
2. The researchers then decide to investigate whether employees working under sub-standard conditions experience greater workplace cohesion than the population of all workers (whose mean score is 73). Test your hypothesis and interpret your result.                                           Sub-standard   Above average       Difference (sub-above) x 88.00 69.00     19.00                s 7.00 12.00     4.00                n   58.00 70.00     58.00 Type of test: __Independent sample, paired sample, or one sample t test?___________________________________________________________ Null & alternative hypotheses (either words or symbols is fine): H1:           ...
The following two samples were collected as matched pairs. Complete parts? (a) through? (d) below. Pair...
The following two samples were collected as matched pairs. Complete parts? (a) through? (d) below. Pair 1 2 3 4 5 6 7 Sample 1 4 5 8 5 7 6 7 Sample 2 5 3 4 3 4 5 4 a. State the null and alternative hypotheses to test if a difference in means exists between the populations represented by Samples 1 and 2. Let mud be the population mean of? matched-pair differences for Sample 1 minus Sample 2....
Question1: It is known the population IQ score follows a normal distribution with mean as 100,...
Question1: It is known the population IQ score follows a normal distribution with mean as 100, SD as 10. A researcher is interested in studying if the average IQ of students from statistics courses on average has a higher IQ score than the population IQ score. To test this hypothesis, the researcher randomly collected a sample of 25 students from statistic class, the mean IQ score for this sample is 110. Compete for the hypothesis test at significant level. Step...
Do students at various universities differ in how sociable they​ are? Twenty-five students were randomly selected...
Do students at various universities differ in how sociable they​ are? Twenty-five students were randomly selected from each of three universities in a region and were asked to report on the amount of time they spent socializing each day with other students. The result for University X was a mean of 7 hours and an estimated population variance of 3 hours; for University​ Y, M=6, S2=2; and for University​ Z, M=8, S2=1.5. What should you​ conclude? Use the 0.05 level....
FOR NEXT 5 QUESTIONS USE THE FOLLOWING DIRECTION: The average life of light bulbs produced by...
FOR NEXT 5 QUESTIONS USE THE FOLLOWING DIRECTION: The average life of light bulbs produced by SABA Electric Co. is expected to be normally distributed with the mean service life of 950 hours and standard deviation of 100 hours. A random sample of 100 bulbs is tested and it has a mean life of 910 hours. Can researcher conclude that the mean service life of the bulbs is less than the expectation? H0 is null hypothesis, and Ha is alternative...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT