The standard deviation in the pressure required to open a certain valve is known to be a = 0.6 psi. Due to changes in the manufacturing process, the quality-control manager feels that the pressure variability has increased.(a) State the null and alternative hypotheses in words.(b) State the null and alternative hypotheses symbolically.(c) Explain what it would mean to make a Type I error.(d) Explain what it would mean to make a Type Il error.(a) State the null hypothesis in words. Choose the correct answer below.O A. The standard deviation in the pressure required to open a certain valvegreater than 0.6 psi.O B. The standard deviation in the pressure required to open any valve is 0.6 psi.O C. The standard deviation in the pressure required to open a certain valve is 0.6 psi.O D. The standard deviation in the pressure requiredopen a certain valve is different from 0.6 psi.Clear allTutoringHelp me solve thisGet more help -MacBook ProG Search or type URLesc2$&@2389134PQWEYtab

Given : The standard deviation in the pressure required to open a certain valve is known to be sigma…

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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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The director of research and development is testing a new drug. She wants to know if there is evidence at the 0.025 level that the drug stays in the system for more than 370 minutes. For a sample of 7 patients, the average time the drug stayed in the system was 380 minutes with a standard deviation of 21. Assume the population distribution is approximately normal. Step 1 of 6: State the null and alternative hypotheses. Step 2 of 6: Find the value of the test statistic. Round your answer to two decimal places. Step 3 of 6: Specify if the test is one-tailed or two-tailed. Step 4 of 6: Find the P-value of the test statistic. Round your answer to four decimal places. Step 5 of 6: Identify the level of significance for the hypothesis test. Step 6 of 6: Make the decision to reject or fail to reject the null hypothesis.
Statistically Graph appropriately with each problem.
Is there a difference between men and women when it comes to seeking preventative healthcare? At the a = 0.01 level of significance, test the claim that the proportion of those who have had a wellness visit with their physician in the past year is the same for men and women. Let pp represent the proportion of females who have had a wellness visit with their physician in the past year and pM represent the proportion of males who have done the same. Which would be correct hypotheses for this test? O Ho:PF = PM, H1:PF > PM O Ho:PF + PM, H1:PF > PM O Ho:PF = pM, H1:pF < pM O Ho:PF = PM, H1:PF # PM In a random sample of 331 females, 306 have had a wellness visit with their physician in the past year. In a random sample of 272 males, 237 have had a wellness visit with their physician in the past year. Find the test statistic (2 decimal places): Give the P-value (4 decimal places - if less than 0.001 answer 0): Which is the correct result: O Reject the Null Hypothesis O Do not Reject the Null…
1. Identify the parameter and set up null and alternative hypotheses. A drug company says their brand of over the counter pain medicine contains on average 1.25 grams of acetaminophen in each tablet. A consumer wants to find evidence against the drug company's claim. 1. Identify the parameter: 2. Null hypothesis: 3. Alternative Hypothesis: а. b. Social scientists suspects the median age of women at the birth of the first child is more than 25 years. 1. Identify the parameter: 2. Null hypothesis 3. Alernative Hypothesis: c. A consumer advocacy group wants to prove there is no difference between regular unleaded and premium unleaded average gas mileage. 1. Identify the parameter: 2.Null hypothesis: 3.Alternative Hypothesis:
. Interpret your result from part (a) if the assumptions for regression inferences hold. Choose the correct interpretation below. A. Presuming that the variables age and price for Corvettes satisfy the assumptions for regression inferences, the standard error of the estimate provides an estimate for the common population standard deviation, σ, of ages for all Corvettes of any particular price. B. Presuming that the variables age and price for Corvettes satisfy the assumptions for regression inferences, the standard error of the estimate provides an estimate for the slope, β1, of the population regression equation for ages for all Corvettes of any particular price. C. Presuming that the variables age and price for Corvettes satisfy the assumptions for regression inferences, the standard error of the estimate provides an estimate for the common population standard deviation, σ, of prices for all Corvettes of any particular age. D. Presuming that…
You want to obtain a sample to estimate a population mean. Based on previous evidence, you believe the population standard deviation is approximately o = 23.8. You would like to be 98% confident that your estimate is within 2.5 of the true population mean. How large of a sample size is required? Do not round mid-calculation. However, you are encouraged to use a critical value accurate to three decimal places – this is important for the system to be able to give hints for incorrect answers.
True or false: if we want to know whether two qualitative variables with many possible outcomes are related, this is impossible to test because statistics deals with quantitative data only. a. False: we can just arbitrarily assign numbers to those outcomes and do regression b. True: we cannot safely do regression on qualitative variables in any circumstances c. False: we can conduct a chi-square test on the independence of these two variables d. True: in general, we don’t use qualitative variables in statistics
A social worker notes that in a population of psychiatric inpatients the ethnic mix seems out of balance with what she has understood to be the ratios in the general population. Respond to the prompts below to show how she might determine whether the inpatient ethnic mix varies from the mix in the general population. Write an example of how the null and alternative hypotheses for this test could be stated. What would the researcher need to know in order to calculate the appropriate test statistic? I.e., what values need to be known or calculated in order to complete the calculation of the test statistic?
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State the null and alternative hypotheses that would be used to test the following claims. 1. (a) There is a difference between the mean ages of employees at two different large companies. (b) The mean of population A is less than 50 more than the mean of population B. (c) The average length of the workweek in mining is longer than that in manufacturing.
11.

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