A breathalyser test is used by police in an area to determine whether a driver has an excess of alcohol in their blood (blood alcohol level). The device is not totally reliable: 7 % of drivers with a true blood alcohol level below the legal limit will give a reading from the breathalyser as being above the limit, while 10% of drivers with a true blood alcohol level above the legal limit will give a reading below the limit. Suppose that in fact 18 % of drivers have a true blood alcohol level above the legal alcohol limit, and the police stop a driver at random. Give answers to the following to four decimal places. Part a) What is the probability that the driver is incorrectly classified as being over the limit (i.e. classified as over limit AND has a true blood alcohol level below the limit)? 0.0574 Part b) What is the probability that the driver is correctly classified as being over the limit (i.e. classified as over limit AND has a true blood alcohol level over the limit)? 0.018 Part c) Find the probability that the driver gives a breathalyser test reading that is over the limit. 0.0754 Part d) Find the probability that the driver has a true blood alcohol level below the legal limit, GIVEN that the breathalyser reading is below the limit. 0.0603

Q: Winter visitors are extremely important to the economy of Southwest Florida. Hotel occupancy is an…

A: Note: Hey there! Thank you for the question. As you have posted a question with multiple sub-parts,…

Q: A well-known psychologist has established what she calls her Generalized Anxiety (GA) scale. The GA…

A: Number of adults =11Regression equation is

Q: homas wants to compare the mean concentration of carbon monoxide (CO) on residential versus…

A: The data set is:   Neighborhood   A B C Residential 1 0.4 1.1   1.2 0.8 1.4   0.9 0.6 1.5…

Q: A dietician read in a survey that 85.36% of adults in the U.S. do not eat breakfast at least 3 days…

A:

Q: A researcher surveys a group of college students to determine the negative life events that they…

A: The pooled variance for the two samples is obtained as follows:

Q: Suppose you work as a researcher for a local anti-gambling advocacy group. You decide to conduct a…

A: We have given that,  Average (x̄) = 39.64, sample size (n) = 29 and standard deviation (s) = 112.84…

Q: A cigarette manufacturer claims that one-eighth of the US adult population smokes cigarettes. In a…

A: Given: P = 18 = 0.125 n = 100 X = 5 α = 0.05 Formula Used: Test-statistic Z = p-PP(1-P)n

Q: d for dimethyl sulfide (DMS) in trained wine tasters is about 23 consumers may be less sensitive,…

A: Given

Q: The boxplot below shows salaries for CPAS and Actuaries in a town. СРА Actuary 20 30 40 50 60 70 80…

A: Box plot is a graphical representation of five number summary (minimum, first quartile, median,…

Q: In Dr. Potter’s study of ‘Objective Increases in Fear Based on Type of Haunting’, he reported that…

A: a. It is given that, ghosts earned a z-score of 0.93, spirits earned a z-score of -0.75, and…

Q: health officer is trying to study the malaria situation of Zambia. From the records of  seasonal…

A: Given the proportion of people having malaria in Zambia was 3.8% in 2015. The size of the sample…

Q: A manufacturer claims that 10% of women using the "pill" suffer from side effects. The Federal Drug…

A: It was found that 103 out of 900 women had side effects. Let p-cap be the sample proportion.

Q: A sample of 124 kissing couples were observed, with 44 of them leaning their heads to the left. Use…

A: The test statistic for One sample proportion test is as follows…

Q: The well-known psychologist Dr. Elbod has established what he calls his Generalized Anxiety Scale…

A: Using the linear regression line:y^​=8.62−0.31x a) When the gas score x= 6.3y^​=8.62−0.31∗6.3=6.67…

Q: A researcher hypothesized that children's cholesterol levels may be affected by educating their…

A: Solution: Let X be the cholesterol level. From the given information, x-bar = 185, S=19.5 and n=40.

Q: A reader wrote in to the opinion column of a sports magazine to say that his grandfather told him…

A: From the given information, the claim is the proportion of the winning team scores more runs in one…

Q: A researcher tests the effectiveness of an anti-anxiety drug by recruiting 500 participants and…

A:

Q: a. Is there is significant reduction in mental alertness after consuming tryptophan versus before?…

A: Let  be the population mean difference between before and after the treatment.Given that,No. of…

Q: Sleep apnea is a condition in which the sufferers stop breathing momentarily while they are asleep.…

A: From the provided information, Sample size (n) = 339 From which 7 suffer from sleep apnea that is…

Q: The table below shows the number of deaths in the U.S. in a year due to a variety of causes. For…

A: We have to find we can support claim or not.

Q: The well-known psychologist Dr. Elbod has established what he calls his Generalized Anxiety Scale…

A: Given regression equation:=>   ŷ = 8.48-0.29xwhere, x= GAS score ; ŷ= predicted sleep time,…

Q: Doctors claim that sticking to a low-fat diet is not enough to lower cholesterol levels of…

A: In order to test the Doctor's claim which states that the average cholesterol levels remain the same…

Q: A developmental psychologist would like to determine how much impulsivity changes for children from…

A: The hypothesis test are used when we have to study a larger population by taking sample from the…

Q: A statistician wants to determine if there is a difference in the fuel efficiency of cars between…

A: Given info: The claim of the test is there is a difference in the fuel efficiency of cars between…

Q: One doctor claims that a person's diastolic blood pressure can be lowered if, instead of taking…

A: The random variable person's diastolic blood pressure follows normal distribution. There are two…

Q: This is an Epidemiology problem.  Cataracts of the eye may be difficult to diagnose in the early…

A: The diagnoses made by the two physicians might not be reliable necessarily.

Q: The volumnes of soda in quart soda bottles can be described by a normal model with a mu of 32.3 oz…

A:

Q: Suppose we want to know the impact of air quality on crime. To perform this study, we collect air…

A: Suppose we want to know the impact of air quality on crime. To perform this study, we collected air…

Q: results from a scholastic assessment test are sent to test makers, the percentiles associated with…

A: Provided information is, results from a scholastic assessment test are sent to test makers, the…

Q: A researcher has participants expecting to receive either painful or mild electrical shocks during a…

A: Usually in survival analysis studies we can use both parametric and non-parametric statistics. For…

Q: A researcher would like to examine how the chemical tryptophan, contained in foods such as turkey,…

A: Given - sample size, n = 9, mean difference in score, M = 14, sum of squares of difference scores,…

Q: Suppose we want to study the effect of smoking on lung capacity in women. Match the study to…

A: The observational studies are the one in which we only observe but not interfere or introduce…

Q: Soon after the pandemic hit, some retailers (e.g. Trader Joe's) limited the number of customers that…

A: X be the waiting time for customers lined up outside one of these retailer. X follows Normal…

Q: A psychologist assumes that playing gentle music during an exam will alter the outcomes. The…

A:

Q: For a population with u =80 and 0 = 12, what is the z-score corresponding to x = 92?

A:

Q: To illustrate the effects of driving under the influence of alcohol, a police officer brought a DUI…

A: It is given that the reaction times in an emergency was measured with unimpaired vision and also…

Q: A researcher would like to examine how the chemical tryptophan, contained in foods such as turkey,…

A: (a) State the hypotheses. That is, there is no significant difference in performance before eating…

Q: Roy ‘s Texaco wants to keep the price of its unleaded gasoline competitive with that of other…

A:

Q: Since the level of significance is 0.10 the critical value is 1.282 The test statistic is: (round to…

A: It is given that  Population proportion, p = 0.6922 Favourable cases, X = 46 Sample size, n = 71…

Q: ng no walking device, a standard walker, and a rolling walker. In addition, the cadence was measured…

A: When a treatment is applied to a group and results are obtained after the treatment, the method is…

Q: Say Dr. Callahan measures her students' levels of narcissism. Her findings reveal that narcissism…

A: Given information: Her findings reveal that narcissism rates are higher in her male students versus…

Q: Thomas wants to compare the mean concentration of carbon monoxide (CO) on residential versus…

A: The hypothesis is, H0: There is no difference between the mean of residential and commercial…

Q: datasets, shown in Figures 3 and 4 below. 2 1- 270 275 280 285 290 295 300 305 310 315 Figure 3

A: From the given data set, firstly make a frequency table and then make a histogram with the help of…