Hypothesis: A popular survey says the mean number of clients who use the organization website is 424. You want to prove it is less. Your sample of 100 shows a mean of 420 clients use the website with a standard deviation of 20. Use a 99% confidence level a)What is your alternative hypothesis? b)What is the decision rule? C)What is the test statistic? d) Do you reject the null hypothesis? Please. type the answer in front of each question
Added by Richard L.
Step 1
a) What is your alternative hypothesis? Show more…
Show all steps
Close
Your feedback will help us improve your experience
Adi S and 77 other Intro Stats / AP Statistics educators are ready to help you.
Ask a new question
Labs
Want to see this concept in action?
Explore this concept interactively to see how it behaves as you change inputs.
Key Concepts
Recommended Videos
A user survey is completed by 40 individuals testing a new interface. They each score the interface on a scale of 1 to 100. The average score is 72 with a standard deviation of 10. The designer wants to test the hypothesis that the rating is above 70 with 95% confidence. Which of these is the appropriate null hypothesis? (Ho: μ ≤ 70, Ho: μ ≥ 70, Ho: μ < 72, or Ho: μ ≥ 72) What z-value is calculated as the test statistic for this hypothesis? What is the p-value associated with this z? What is the decision? (fail to reject null hypothesis or reject null hypothesis) With 95% confidence, is the mean greater than 70? (yes or no)
Madhur L.
A random sample of 100 observations from a population with a standard deviation of 23.99 yielded a sample mean of 94.1. 1. Given that the null hypothesis is μ=90 and the alternative hypothesis is μ>90, using α=0.05, find the following: (a) Test statistic = (b) P-value: (c) The conclusion for this test is: A. There is insufficient evidence to reject the null hypothesis B. Reject the null hypothesis C. None of the above 2. Given that the null hypothesis is μ=90 and the alternative hypothesis is μ≠90, using α=0.05, find the following: (a) Test statistic = (b) P-value: (c) The conclusion for this test is: A. Reject the null hypothesis B. There is insufficient evidence to reject the null hypothesis C. None of the above
Adi S.
Consider the following hypothesis test. The following results are for two independent samples taken from two populations. Excel File: data10-03.xlsx Sample 1 Sample 2 n1 = 80 n2 = 70 x̄1 = 104 x̄2 = 106 σ1 = 8.4 σ2 = 7.6 Enter negative values as negative numbers. a. What is the value of the test statistic? (to 2 decimals) b. What is the p-value? (to 4 decimals) c. With α = 0.05, what is your hypothesis testing conclusion? - Select your answer - Reject the null hypothesis Do not reject the null hypothesis
Rashmi S.
Recommended Textbooks
Elementary Statistics a Step by Step Approach
The Practice of Statistics for AP
Introductory Statistics
Transcript
18,000,000+
Students on Numerade
Trusted by students at 8,000+ universities
Watch the video solution with this free unlock.
EMAIL
PASSWORD