Suppose a random sample of 150 universites is used to test the null hypothesis that the average number of spam emails economics graduate students receive in a month is 30.48. The value of the test statisticis found to be 1.02If the null is tested against the alternative hypothesis that the number of spam emails is not 30.48, the smallest significance level at which you can reject the null hypothesis is(Round your answer to four decimal places)If the null is tested against the alternative hypothesis that the number of spam emais is more than 30.48, the smallest significance level at which you can reject the null hypothesis is(Round your answer to four decimal places)If while conducting a hypothesis test you reject the null hypothesis when in fact it was true, you would have made a

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Description: Suppose a random sample of 150 universites is used to test the null hypothesis that the average number of spam emails economics graduate students receive in a month is 30.48. The value of the test statisticis found to be 1.02If the null is tested ag

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Suppose a random sample of 150 universites is used to test the nul hypothesis that the average number of spam emails economics graduate students receive in a month is 30.48. The value of the test statisti: is found to be 1.02 #f the nut is tested against the altemative hypothesis that the number of spam emalis is not 30.48, the smallest significance level at which you can reject the nuli hypothesis isO (Round your answer to four decimal places) If the nulis sested against the atemative hypothesis that the number of spam emais is more than 30.48, the smallest signifcance level at which you can reject the null hypothesis isO (Round your answer to four decimal places.) If while conducting a hypothesis test you reject the null hypothesis when in fact it was true, you would have made a

Suppose a random sample of 150 universites is used to test the nul hypothesis that the average number of spam emails economics graduate students receive in a month is 30.48. The value of the test statisti: is found to be 1.02 #f the nut is tested against the altemative hypothesis that the number of spam emalis is not 30.48, the smallest significance level at which you can reject the nuli hypothesis isO (Round your answer to four decimal places) If the nulis sested against the atemative hypothesis that the number of spam emais is more than 30.48, the smallest signifcance level at which you can reject the null hypothesis isO (Round your answer to four decimal places.) If while conducting a hypothesis test you reject the null hypothesis when in fact it was true, you would have made a

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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Assume that matched pairs of data from a poll of Internet users who were asked if they make travel plans through the Internet result in 304 positive signs, 278 negative signs, and 35 ties when the value of the secon variable is subtracted from the corresponding value of the first variable. Use the sign test with a 0.05 significance level to test the null hypothesis of no difference. Let ₁ denote the median of the first variable and 12 denote the median of the second variable. What are the null and alternative hypotheses? O A. Ho: 1₁2 112 H₁:1₁ <1₂ OC. Ho: 11₁ 112 H₁: 1₁ <12 O B. Ho: 11 #11₂ H₁:1₁ =1₂ O D. Ho: 111 112 H₁:1₁ #1₂ Find the test statistic. Test statistic = Find the P-value. P-value= (Round to four decimal places as needed.) Does the null hypothesis of no difference hold? (Round to two decimal places as needed.) O A. Since the P-value is less than the significance level, reject the null hypothesis of no difference. O B. Since the P-value is greater than the significance…
Suppose 218 subjects are treated with a drug that is used to treat pain and 54 of them developed nausea. Use a 0.10 significance level to test the claim that more than 20% of users develop nausea. identify the null and alternative hypotheses for this test test statistic pvalue conclusion
A manufacturer wants to test the claim that more than 5% of widgets coming of the manufacturing line are defective. In random sample of 1200 widgets it is found that 69 of those are defective. Use a significance level of 0.05 to test the manufacturers claim.
The average January temperatures for popular tourist cities on selected continents is listed. Is there enough evidence at the 0.1 significance level to conclude a difference in temperatures for these three regions? Write a conclusion statement for your results. Asia: 89, 35, 83, 67, 48 Europe: 41, 38, 36, 56, 50 South America: 87, 75, 66, 84, 75
Suppose 225 subjects are treated with a drug that is used to treat pain and 55 of them developed nausea. Use a 0.01 significance level to test the claim that more than 20% of users develop nausea The test statistic for this hypothesis test is____ p-value___
S A 9-year-old girl did a science fair experiment in which she tested professional touch therapists to see if they could sense her energy field. She flipped a coin to select either her right hand or her K left hand, and then she asked the therapists to identify the selected hand by placing their hand just under her hand without seeing it and without touching it. Among 275 trials, the touch therapists were correct 115 times. Use a 0.01 significance level to test the claim that touch therapists use a method equivalent to random guesses. Do the results suggest that touch therapists are effective? docx @ Identify the null and alternative hypotheses for this test. Choose the correct answer below. 2 OA. Ho: p*0.5 H₁: p=0.5 View an example Get more help. D W Identify the test statistic for this hypothesis test. The test statistic for this hypothesis test is (Round to two decimal places as needed.) S C. Ho: p=0.5 H₁: p*0.5 Monroe's Temp....docx Removed X command H # 3 8.0 F3 E D C $ 4 Q R F…
A student wants to see if the number of times a book has been checked out of the library in the past year and the number of pages in the book are related. She guesses that the number of times a book has been checked out of the library in the past year will be a predictor of the number of pages it has. She randomly sampled 15 books from the library, test her claim at a 0.05 level of significance. number of times checked out number of pages 13 223 45 350 49 377 30 371 3 343 7 280 17 218 7 265 20 382 23 287 1 313 30 388 20 358 2 311 40 421 The correlation coefficient: r= (round to 3 decimal places) The equation y=a+bx is: (round to 3 decimal places) y=+ x The hypotheses are: H0:ρ=0H0:ρ=0 (no linear relationship)HA:ρ≠0HA:ρ≠0 (linear relationship) (claim) Since αα is 0.05 the critical value is -2.16 and 2.16 The test value is: (round to 3 decimal places) The p-value is: (round to 3 decimal places) The decision is to reject H0H0 do not reject…
US Universities found that 72% of people are concerned about the possibility that their personal records could be stolen over the internet. If a random sample of 300 college students at a Midwestern university were taken and 228 of them were concerned about the possibility that their personal records could be stolen over the Internet, could you conclude at the 0.025 level of significance that a higher proportion of the university’s college students are concerned about Internet theft than the public at large? Report the p-value for this test. Z0.025 = 1.96
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A pharmaceutical company claims that the mean time it takes for their new pain relief medication to take effect is 20 minutes. A sample of 12 patients is randomly selected and given the medication. The time it takes for each patient to feel the effects of the medication (in minutes) is recorded as follows: 23, 19, 17, 22, 22, 23, 20, 23, 19, 21, 18, 25 a) Conduct a hypothesis test with a significance level of 0.05 to determine if there is evidence to support the company's claim. b) Calculate a 95% confidence interval for the true mean time it takes for the medication to take effect.
When she was 9 years of age, a girl did a science fair experiment in which she tested professional touch therapists to see if they could sense her energy field. She flipped a coin to select either her right hand or her left hand, and then she asked the therapists to identify the selected hand by placing their hand just under her hand without seeing it and without touching it. Among 241 trials, the touch therapists were correct 104 times. Use a 0.10 significance level to test the claim that touch therapists use a method equivalent to random guesses. Do the results suggest that touch therapists are effective? Let p denote the population proportion of correct hand selections by touch therapists. Identify the null and alternative hypotheses to test the claim that touch therapists use a method equivalent to random guesses. Họ:P V H:p (Type integers or decimals. Do not round.) Identify the test statistic. (Round to two decimal places as needed.) Identify the P-value. P-value = (Round to…
14. In 2005, Health Canada claimed that 16.7% of Canadian adults are obese. A researcher wanted to check whether this percentage has changed in 2009. He randomly selected 200 Canadian adults and found 29 of them are obese. Use9% significance level. Null and alternative hypothesis are a) H0: p = 0.167, H1: p not equal to 0.167 b) H0: mu not equal to 16.7, H1: mu = 16.7 c) H0: p not equal to 0.167, H1: p = 0.167 d) H0: mu = 16.7, H1: mu not equal to 16.7