The piston diameter of a certain hand pump is 0.4 inch. The manager determines that the diameters are normally distributed, with a mean of 0.4 inch and a standard deviation of 0.005 inch. After recalibrating the production machine, the manager randomly selects 26 pistons anddetermines that the standard deviation is 0.0037 inch. Is there significant evidence for the manager to conclude that the standard deviation has decreased at the a= 0.10 level of significance?What are the correct hypotheses for this test?The null hypothesis is Ho: V▼The alternative hypothesis is H₁:▼Calculate the value of the test statistic.x² = (Round to three decimal places as needed.)Use technology to determine the P-value for the test statistic.The P-value is(Round to three decimal places as needed.)What is the correct conclusion at the α = 0.10 level of significance?Since the P-value isthan the level of significance,the null hypothesis. Theresufficient evidence to conclude that the standard deviation has decreased at the 0.10 level of significance.

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Answered: What are the correct hypotheses for…

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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Using the information obtained from a study on heart rate, the following data were obtained for the hypothesis test: • A doctor is testing the claim that the average heart rate of patients is less than 70 bpm. • Assume the significance level is a = 0.05. • The z- test statistic is calculated as -2.01. What is the p-value and conclusion for this hypothesis test? Move the blue dot to choose the appropriate test (left-, right, or two-tailed). Use the graph below to move the slider to he test statistic in order to find the p-value. Then, make a conclusion based on those results.
IDENTIFY THE P VALUE AS WELL
Studies show that the level of anxiety has increased since the pandemic. The average score before the pandemic was mu equal to 10. A sample of 76 individuals surveyed in the past three months produced M=12.8 and s=6.7. Based on the sample, was there a significant increase in the average anxiety level since the pandemic started at the 5% significance level? What hypothesis test is this? (a)Chi-Square Test for Independence (b)One-Sample T-Test for Mean (c)One-Sample Z-Test for Mean (d)Two-Sample T-Test for Mean
Find the P-value for the indicated hypothesis test with the given standardized test statistic, z. Decide whether to reject H0 for the given level of significance α. Right-tailed test with test statistic z=1.85 and α=0.09 P-value=enter your response here (Round to four decimal pla
12 data values randomly collected from a normally distributed population has A sample of n variance s? = 17.2. We wish to test the null hypothesis Họ:o? = 9.9 against the alternative hypothesis H1 :0? > 9.9 at a significance of a = 0.05. What is the value of the test statistic? Write your answer rounded to 3 decimal places. What is the critical value? Write your answer rounded to 3 decimal places. Do we reject the null hypothesis? O we fail to reject the null hypothesis. O we reject the null hypothesis.
Test of independence between X and Y. Does it reject or not the null hypothesis if chi-squared test statistic (0.009) is lower than the significance level (1%)? Would the variables be independent or not?
- 1.80 Starbucks Coffee Co. uses a data-based approach to improving quality and customer satisfaction. An experiment was conducted to determine the factors in the bag-sealing equipment that might be affecting the ease of opening the bag without tearing the inner liner of the bag. Among the factors that could affect the rating of the ability of the bag to resist tears were the viscosity, pressure, and plate gap on the bag-sealing equipment. The accompanying data were collected on 18 bags in which the plate gap was varied. Develop a multiple regression model that uses the viscosity, pressure, and plate gap on the bag-sealing equipment to predict the tear rating of the bag. Do you think that you need to use all three independent variables in the model? Explain. E Click the icon to view the bag data. State the multiple regression equation that uses the viscosity, pressure, and plate gap on the bag-sealing equipment to predict the tear rating of the bag. Let X, be the viscosity, let X2 be…
Find the P-value for the indicated hypothesis test with the given standardized test statistic, z. Decide whether to reject H, for the given level of significance a. Two-tailed test with test statistic z = - 1.69 and a = 0.07 P-value = (Round to four decimal places as needed.)
The display provided from technology available below results from using data for a smartphone carrier's data speeds at airports to test the claim that they are from a population having a mean less than 6.00 Mbps. Conduct the hypothesis test using these results. Use a 0.05 significance level. Identify the null and alternative hypotheses, test statistic, P-value, and state the final conclusion that addresses the original claim. Assuming all conditions for conducting a hypothesis test are met, what are the null and alternative hypotheses? A. Ho: μ = 6.00 Mbps H₁: μ 6.00 Mbps Display from Technology T-Test μ < 6.00 t= 3.608327 p = 0.000361 x = 5.39 Sx = 1.195388 n = 50
Some people seem to believe that you can fix anything with duct tape. Even so, many were skeptical when researchers announced that duct tape may be a more effective and less painful alternative than liquid nitrogen, which doctors routinely use to freeze warts. An article described a study conducted at a medical center. Patients with warts were randomly assigned to either the duct tape treatment or the more traditional freezing treatment. Those in the duct tape group wore duct tape over the wart for 6 days, then removed the tape, soaked the area in water, and used an emery board to scrape the area. This process was repeated for a maximum of 2 months or until the wart was gone. Data consistent with values in the article are summarized in the following table. Number with Wart Treatment Successfully Removed Liquid nitrogen freezing 102 60 Duct Tape 103 88
You are conducting a study to see if the probability of a true negative on a test for a certain cancer is significantly more than 0.86. You use a significance level of α-0.01. Ho:p = 0.86 H1:p > 0.86 You obtain a sample of size n = 323 in which there are 290 successes. What is the test statistic for this sample? (Report answer accurate to three decimal places.) test statistic = What is the p-value for this sample? (Report answer accurate to four decimal places.) p-value = %3D
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