Several years ago, 35% of parents who had children in grades K-12 were satisfied with the quality of education the students receive. A recent poll asked1,195 parents who have children in grades K-12 if they were satisfied with the quality of education the students receive. Of the 1,195 surveyed, 483indicated that they were satisfied. Construct a 99% confidence interval to assess whether this represents evidence that parents' attitudes toward thequality of education have changed.What are the null and alternative hypotheses?Ho: pversus H,: p(Round to two decimal places as needed.)

here given , Several years ago, 35% of parents who had children in grades K-12 were satisfied with…

Answered: indicated that they were satisfied.…

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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Several years ago, 33% of parents who had children in grades K-12 were satisfied with the quality of education the students receive. A recent poll asked 1,125 parents who have children in grades K-12 if they were satisfied with the quality of education the students receive. Of the 1,125 surveyed, 451 indicated that they were satisfied. Construct a 99% confidence interval to assess whether this represents evidence that parents' attitudes toward the quality of education have changed. What are the null and alternative hypotheses? Ho: P ▼ versus H₁: p (Round to two decimal places as needed.)
What happens to the width of a confidence interval as the significance level, a, decreases?
Repairs: A sample of six records for repairs of a component showed the following costs: 95, 87, 20, 75, 90, 96. Construct a 90% confidence interval for the mean cost of a repair for this type of component. Use tables and technology. Round your answers to at least one decimal place.
The Vegetarian Resource Group commissioned Harris Poll in 2016 to conduct a nationally representative online poll of 2,015 adults aged 18 and over. They found that 3.3% of the respondents identified as vegetarian. a. Construct and interpret a 95% confidence interval for the proportion of vegetarians. b. Based on the interval what kind of evidence do you expect to have for the alternative two-sided hypothesis test? explain. I do not understand question b
A learn-to-type software program claims that it can improve your typing skills. To test the claim and possibly help yourself out, you and five of your friends decide to try the program and see what happens. Use the table below to construct a 99% confidence interval for the true mean change in the typing speeds for people who have completed the typing program. Let Population 1 be the typing speed before taking the program and Population 2 be the typing speed after taking the program. Round the endpoints of the interval to one decimal place, if necessary. Typing Speeds (in Words per Minute) Before, After 53 43 45 33 43 32 30 33 44 49 32 40 (See photo)
What is a confidence interval in statistics?
Why are confidence intervals important and what do they mean to a study?
Report an appropriate hypothesis test for a positive linear relationship and use a 5% significance level. Explain the potential error in words, in context. In the answer options below I have used the phrase “a certain relationship” because I don’t want to give away exactly what type of relationship it is. Group of answer choices We would be accepting that there was a certain relationship between Sale amount and Tip when actually there wasn’t. We would not be accepting that there was a certain relationship between Sale amount and Tip when indeed there wasn’t. We would not be accepting that there was a certain relationship between Sale amount and Tip when actually there was. We would be accepting that there was a certain relationship between Sale amount and Tip when indeed there was.
A learn-to-type software program claims that it can improve your typing skills. To test the claim and possibly help yourself out, you and eight of your friends decide to try the program and see what happens. Use the table below to construct an 85%85% confidence interval for the true mean change in the typing speeds for people who have completed the typing program. Let Population 1 be the typing speed before taking the program and Population 2 be the typing speed after taking the program. Round the endpoints of the interval to one decimal place, if necessary. Typing Speeds (in Words per Minute) Before After 42 33 41 54 31 50 30 48 41 31 49 52 34 54 48 49 39 48
A study of 40 English professors showed that they spend, on average, 12.6 minutes correcting a student's term paper. The standard deviation was 2.5 minutes. Construct the 99% confidence interval of the mean for all term papers.

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indicated that they were satisfied. Construct a 99% confidence interval to assess whether this represents evidence that parents' attitudes toward the quality of education have changed.