A new breathalyser is being trialled. When alcohol is present, the breathalyser correctly predicts alcohol in the system 90% of the time, but gives a false positive (indicates alcohol in the systemwhen the individual has not drunk any alcohol) 4% of the time. On 20th December within the adult population 25% of individual have had alcohol. Given you have had an alcoholic drink what is theprobability the breathalyser does not detect this?0.900.100.040.960.25No answer

Answered: Image /qna-images/answer/a38031fe-6ff1-4b07-b383-aab1ec4d84fd.jpg

Answered: A new breathalyser is being trialled.…

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018

18th Edition

ISBN:9780079039897

Author:Carter

Publisher:Carter

Chapter4: Equations Of Linear Functions

Section4.5: Correlation And Causation

Problem 2BGP

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A headache medicine is tested on an experimental group of 50 patients who have headaches. Out of these people, 37 of them say they felt better when taking the medicine. A fake pill (placebo) is given to 50 different patients, of whom 27 say they felt better after taking the "medicine". Is this enough evidence to show that a higher percentage of people in the experimental group were cured, compared to the control group? (Use a = .01) Type of Test: Hypotheses: Test Statistic: P-value: Decision: XC. In a sentence, what can be said about the medicine?
The owner of a food store was concerned about her sales of a yogurt. To help boost sales, she decided to place the product on a different shelf. She kept track of sales (number of containers sold per week) for six months after she made the change. The values are in a stem-and-leaf display, along with the sales numbers for the six months prior to making the change. Do these results suggest that sales are better after the change? Test an appropriate hypothesis and state your conclusion. Be sure to check assumptions and conditions. Assume α = 0.05. Click the icon to view the stem-and-leaf displays. Are the assumptions satisfied? O A. Yes, the assumptions are satisfied because the data values are independent and the data are appropriately paired. B. Yes, the assumptions are satisfied because the data are approximately normal. O C. No, the assumptions are not satisfied because the data are approximately normal. D. No, the assumptions are not satisfied because the data are not a random…
Cindy, a financial analyst is studying the relationship between family decisions to borrow money to finance a child’s education and the child’s expected income after graduation. To aid the study, 440 randomly selected families were surveyed with the results provided below. At alpha =0.01, can you conclude that the decision to borrow money is related to a child’s expected income after graduation? Expected income More Likely Less Likely Did not make a difference Did not consider it Less than $20,000 37 10 22 25 $20,000-$45000 28 12 15 16 $45000-$70000 55 9 65 48 Greater than $70000 36 1 29 32 What is the degrees of freedom? What is the critical value? Leave your answers in 4 decimal places The degrees of freedom is and the P- value is .
A biopsychologist studies the role of the brain chemical serotonin in aggression. One sample of rats serves as a control group and receives a placebo. A second sample of rats receives a drug that lowers brain levels of serotonin. Then the researcher tests the animals by recording the number of aggressive responses each of the rats display. (Hint: Be sure to use the correct test statistic). Low Serotonin Control n = 4 n = 8 M = 22 M = 14 SS = 76 SS = 164 Does the drug have a significant effect on aggression? Use an alpha level of .05, two tails. Be sure to state your conclusion. Use Cohen’s d to measure the effect size. What is the size of effect?
Management of a theater in a large city wants to know whether its popularity increased after it ran a popular musical. According to a previous study, 25% of city residents said they had been to the theater in the past year. A more recent study, conducted after the musical had run for a year, found that 156 of 536 residents sampled said they had been to the theater in the past year. Is there evidence at the ? = 0.05 level that the number of residents who have been to the theater has increased in the last year?
In a study assessing helping behavior among college students on their way to class, you recruit 10 students. You tell some participants that they are late for class and need to rush. You tell others they are right on time. Finally, you tell others they have lots of time before class. As they walk across campus, they come across a man (actually a confederate) who appears to need help. You measure the extent to which the participant noticed that the confederate needed help (1 = did not notice to 9 = really noticed). State the null hypothesis. Ho: µ1 = µ2 = µ3 Ho: X1 ≠ X2 ≠ X3
In a study assessing helping behavior among college students on their way to class, you recruit 10 students. You tell some participants that they are late for class and need to rush. You tell others they are right on time. Finally, you tell others they have lots of time before class. As they walk across campus, they come across a man (actually a confederate) who appears to need help. You measure the extent to which the participant noticed that the confederate needed help (1 = did not notice to 9 = really noticed). Which hypothesis test would you calculate? F test Independent sample t-test z test Dependent sample t-test
In a study assessing helping behavior among college students on their way to class, you recruit 10 students. You tell some participants that they are late for class and need to rush. You tell others they are right on time. Finally, you tell others they have lots of time before class. As they walk across campus, they come across a man (actually a confederate) who appears to need help. You measure the extent to which the participant noticed that the confederate needed help (1 = did not notice to 9 = really noticed). What is the acceptable level of risk? P >.05 p <.05 P = .05 P <.1
Pls specify everything all conditions and all step.
the morgen of error for 95% 63 5. Did the movie "Jaws" scare you out of the water or the movie "Psycho" change your shower habits? According to a University of Michigan study, many adults have experienced lingering "fright" effects from a scary movie or TV show they saw as a teenager. (Tampa Tribune Mar 10, 99). In a survey of 150 college students, 39 said they still experience "residual anxiety" from a scary movie or TV show. Give a point estimate, for the true proportion of college show experience "residual anxiety" from a scary TV show or movie. Find a 95% confidence interval for p. Interpret the interval you found in the previous step
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