**Transcription for Educational Purposes**---**Find the P-value. Round the answer to at least four decimal places.****P-value =** [Input box][Buttons: Check (X), Retry ( **Sick Days in Bed**A researcher wishes to see if the average number of sick days a worker takes per year is less than 5. A random sample of 29 workers at a large department store had a mean of 4.7. The standard deviation of the population is 1.3. Is there enough evidence to support the researcher's claim at \( \alpha = 0.10 \)? Assume that the variable is normally distributed. Use the P-value method with tables.### Part: 0 / 5### Part 1 of 5State the hypotheses and identify the claim.- \( H_0: \) [Choose one]- \( H_1: \) [Choose one]- [Symbols for comparison: <, >, ≠, =, ≤, ≥] - \( \mu \)This hypothesis test is a [Choose one] test.---### Part: 1 / 5### Part 2 of 5Compute the test value. Always round z score values to at least two decimal places.\[ z = \] [Input box with options to clear or reset]

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Answered: Sick Days in Bed A researcher wishes to…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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In a study on running and happiness, runners indicated the number of miles they ran in a day and their subsequent score on a Happiness Survey (higher score = greater happiness). Runner # of miles (x) Happiness Score (y) 1 16 12 2 4 3 12 14 4 2 8 For these data: The mean of miles run is: 8.50 The mean of the Happiness scores is: 10.00 The standard deviation of the Miles scores is: 5.72 The standard deviation of the Happiness scores is: 3.16 In your submission, please include a copy of the SPSS or Excel output and answer the following: A. What is the r and r? value? B. Based on Pearson's r and r2 value, describe the relationship (direction/strength) that exists between # of miles run and Happiness scores. C. Create a scatterplot for the data using Excel or SPSS (include output in your submission). D. Insert the prediction line from Excel/SPSS on your scatterplot.
A random sample of 76 eighth-grade students' scores on a national mathematics assessment test has a mean score of 273. This test result prompts a state school administrator to declare that the mean score for the state's eighth graders on this exam is more than 270. Assume that the population standard deviation is 33. At α=0.02, is there enough evidence to support the administrator's claim? Complete parts (a) through (e). Part 1 (a) Write the claim mathematically and identify H0 and Ha. Choose the correct answer below. A.) H0: μ≥270 (claim) Ha: μ<270 B.) H0: μ≤270 (claim) Ha: μ>270 C.) H0: μ=270 (claim) Ha: μ>270 D.) H0:μ≤270 Ha: μ>270 (claim) E.) H0: μ<270 Ha: μ≥270 (claim) F.) H0: μ=270 Ha: μ>270 (claim) (b) Find the standardized z, and its coresponding area z=_____ (c) Find the P-value P-value =_____ (d) Decide whether to reject or fail the null…
The mean GPA for 50 students was 3.02 and the standard deviation was 0.3. Assume that the distribution of GPAs is unimodal and symmetric.The percentage of data that occurs within one standard deviation of the mean should be Select an answer 99.7% 68% 95% The percentage of data that occurs within two standard deviations of the mean should be Select an answer 99.7% 68% 95% The percentage of data that occurs within three standard deviations of the mean should be Select an answer 95% 99.7% 68%
Telephone Calls A researcher knew that before cell phones, a person made on average 2.9 calls per day. He believes that the number of calls made per day today is higher. He selects a random sample of 28 individuals who use a cell phone and asks them to keep track of the number of calls that they made on a certain day. The mean was 3.1. At =α0.10, is there enough evidence to support the researcher's claim? The standard deviation for the population found by a previous study is 0.7. Assume that the variable is normally distributed. Use the critical value method with tables. State the hypotheses and identify the claim with the correct hypothesis. :H0 =μ2.9 ▼not claim :H1 >μ2.9 ▼claim This hypothesis test is a ▼one-tailed test. Part 2 of 5************************************************************* Find the critical value(s). Round the answer to two decimal places. If there is more than one critical value, separate them with commas. Critical…
In a normally distributed data set a mean of 31 where 95% of the data fall between 27.4 and 34.6, what would be the standard deviation of that data set? Homework Help: 4VG. Empirical Rule with examples > (4:38) 4DE. Standard scores and the Empirical Rule (DOCX) 2.6 O 7.6 1.8 3.1
Wheaties cereal is claimed to have an average of 3 grams of dietary fiber per serving. We want to test this hypothesis and to see whether we believe that is true or that the mean amount of fiber is significantly different from 3 grams. A random sample of 25 servings was taken and it yielded a sample mean of 3.4 grams with the sample standard deviation in the amount of fiber, s = .8 grams. %3D Assume that software has determined the p-value to be.02. Carry out the test at the 5% level of significance. Be sure to state your decision rule and your decision for the test. O Fail to Reject the null hypothesis since the p-value is .05 O Fail to Reject the null hypothesis since the p-value is > .05
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How do you find (b.)?
Consider a value to be significantly low if its z score less than or equal to minus−2 or consider a value to be significantly high if its z score is greater than or equal to 2. A test is used to assess readiness for college. In a recent year, the mean test score was 21.5 and the standard deviation was 5.1. Identify the test scores that are significantly low or significantly high. What test scores are significantly low? What test scores are significantly high?
The lengths of pregnancies in a small rural village are normally distributed with a mean of 260 days and a standard deviation of 13 days. In what range would you expect to find the middle 50% of most pregnancies? Between________ and _________. If you were to draw samples of size 53 from this population, in what range would you expect to find the middle 50% of most averages for the lengths of pregnancies in the sample? Between _________and_______ . Enter your answers as numbers. Your answers should be accurate to 1 decimal places.
A company that develops an automated customer service model is interested in knowing whether two versions, Version A and Version B, will get different ratings from customers. Participants in a focus group are taken through samples from both versions, then take a survey to rate each version. A summary of the data obtained from the study is given below. Assume ratings from the different surveys generally have the same standard deviation. Mean Observations Pearson Correlation Hypothesized Mean Difference df t Stat P(T<=t) one-tail t Critical one-tail P(T<=t) two-tail t Critical two-tail Confidence Level Version A Version B 33.133 28.67 15 15 -0.325 0.00 14 n = Ex: 9 -1.426 0.088 -1.345 0.176 -1.761 95% Degrees of freedom: df Point estimate for Version A: XA = Ex: 1.234 Point estimate for Version B: x B = 1 = من t = −1 Ex: 1.234 0 1 t = P = = Ex: 1.234 2 3 2
A standardized exam's scores are normally distributed. In a recent year, the mean test score was 1539 and the standard deviation was 315. The test scores of four students selected at random are 1940, 1290, 2240, and 1420. Find the z-scores that correspond to each value and determine whether any of the values are unusual. The z-score for 1940 is. (Round to two decimal places as needed.) The Z-score for 1290 is. (Round to two decimal places as needed.) The Z-score for 2240 is. (Round to two decimal places as needed.) The Z-score for 1420 is. (Round to two decimal places as needed.) Which values, if any, are unusual? Select the correct choice below and, if necessary, fill in the answer box within your choice. OA. The unusual value(s) is/are. CD (Use a comma to separate answers as needed.) OB. None of the values are unusual.

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