The U.S. Department of Transportation, National Highway Traffic Safety Administration, reported that 77% of all fatally injured automobile drivers were intoxicated. A random sample of 54 records of automobile driver fatalities in a certain county showed that 34 involved an intoxicated driver. Do these data indicate that the population proportion of driver fatalities related to alcohol is less than 77% in Kit Carson County? Use ? = 0.01. (a) What is the level of significance? State the null and alternate hypotheses. (b) What sampling distribution will you use? What is the value of the sample test statistic? (c) Find the P-value of the test statistic. Sketch the sampling distribution and show the area corresponding to the P-value. (d) Based on your answers in parts (a) to (c), will you reject or fail to reject the null hypothesis? Are the data statistically significant at level ?? (e) Interpret your conclusion in the context of the application.

Q: A study was conducted to determine the proportion of people who dream in black and white instead of…

A: n₁= 317 x₁= 69 n₂= 296 x₂= 15 α = 0.05

Q: a) What is the level of significance? State the null and alternate hypotheses. H0: ? = 13.5; H1: ?…

A: Let μ be the population mean average mileage driven. Given that, Population mean (μ) = 13.5…

Q: In a random sample of 580 people aged 20-24, 110 owned an iPad. In a random sample of 450 people…

A:

Q: Past studies have indicated that the percentage of smokers is estimated to be about 33%. Given the…

A:

Q: In 2005, Health Canada claimed that 16.8% of Canadian adults are obese. A researcher wanted to check…

A: Given, The sample proportion is,

Q: summarized below in thousands. 1992: mean = 13,126; stdev = 675.3; n = 20 2012: mean = 14,197;…

A: The pooled standard deviation can be calculated as:

Q: A study was conducted to determine the proportion of people who dream in black and white instead of…

A: a.   Denote p1, p2 as the true population proportions of people over the age 55 and under the age 25…

Q: Professors collected data consisting of eye color and gender of statistics students. Among 950 male​…

A: Given that, For males:  X1= 372 and sample size n1= 950  p1^ = X1/n1 = 372/950 =0.3916 For females:…

Q: Past studies have indicated that the percentage of smokers was estimated to be about 33%. Given the…

A: Answer: From the given data, Population proportion (P) = 33% = 0.33 Sample size (n) = 1875 x = 436…

Q: You    want    to    test    whether    the    proportion    of    men    who    smoke    is…

A: Given that  Male  Female  Sample size (n1) = 200 Sample size (n2) = 200 Smoke (x1) = 62 Smoke…

Q: 8. Is there a doctor in the house? The Bureau of Labor Statistics reported that in May 2009, the…

A:

Q: a study was conducted to determine the proportion of people who dream in black and white instead of…

A: The objective of this question is to test the claim that the proportion of people over 55 who dream…

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A: The claim of the test is there is sample evidence that the birth of boys is more common than the…

Q: The accompanying data set includes volumes (ounces) of a sample of cans of regular Coke. The summary…

A: Sample size, n=36 Sample mean, x¯=12.194 Sample standard deviation, s=0.117

Q: article in the Archives of Internal Medicine reported that in a sample of 244 men, 73 had elevated…

A: Given that  Sample size n1=244 , n2=232 Favorable cases x1=73, x2=44

Q: The average one-ounce chocolate chip cookie contains 128 calories. A random sample of different…

A:

Q: An SMR over 100% ( i.e.,171 %) indicates that the "healthy worker effect" may be an issue in the…

A: Given::- An SMR over 100% (i.e., 171%) indicates that the "healthy worker effect" may be an issue in…

Q: A company executive claims that employees in his industry get 100 junk emails per day. To further…

A: Given Information: Consider the given dataset: 125, 101, 109, 94, 122, 92, 119, 90, 118, 122. The…

Q: Identify the null and alternative hypotheses. Hoμ H₁μ 12.00 # 12.00 (Type integers or decimals. Do…

A: Step 1:     Step 2:   Step 3: State the conclusion about the null hypothesis.Since the P-value is…

Q: The U.S. Department of Transportation, National Highway Traffic Safety Administration, reported that…

A: From the provided information, Sample size (n) = 54 Out of which 35 involved an intoxicated driver.…

Q: In a survey of 1150 adult males, 805 said they use the Internet. In a survey of 1050 females, 746…

A: Let x1=The number of male internet users. And x2=The number of female internet users. With the usual…

Q: score A credit score is used by credit agencies (such as mortgage companies and banks) to assess the…

A: Given:Mean(x)=716.2Standard deviation(s)=81.1Sample size(n)=34α=0.05

Q: tor for a medical assistance program wishes to test the hypothesis that her students score higher…

A: As the population standard deviation is not known, we will use a t-test. The null and alternative…

Q: a study was conducted to determine the proportion of people who dream in black and white instead of…

A: The objective of this question is to conduct a hypothesis test to determine if the proportion of…

Q: The Congressional Budget Office reports that 36% of federal civilian employees have a bachelor's…

A: Given : Mean = μ = 0.36  Level of significance = 0.05 p^ = xn    = 31118    = 0.2627

Q: A study was conducted to determine the proportion of people who dream in black and white instead of…

A: Dear student as per guidelines we answer the first three subparts only. Please post other subparts…

Q: 2. (Table: TV and Aggressiveness) In a fictional study, a pretest-posttest design was used to…

A: The data for the number of aggressive responses before and after the television show is given with…

Q: Based on information from the Federal Highway Administration web site, the average annual miles…

A: Consider that μ is the national average of the mileage.

Q: 52% of students entering four-year colleges receive a degree within six years. Is this percent…

A: Solution: Given information: n= 231 Sample size  x= 129 success  p^=xn= 129231=0.5584   Sample…

Q: reporter has claimed that the majority of Colleges in the United States are Private For-Profit…

A:

Q: o dream in black and white is greater than the proportion for those under 25. Complete parts (a)…

A: We have given that  Sample size n1 = 320 , n2= 306  Favorable cases x1= 74 , x2= 15…

Q: A marketing manager for a cell phone company claims that more than 35% of children aged 10-11 have…

A: Assume that p is the true proportion of all children aged 10-11 that have cell phones.

Q: Six hundred adult Americans were asked by telephone poll, "What do you think constitutes a…

A: a.The relative frequency distribution of salaries is given.Salary ($)Relative Frequency<…

Q: in october 1947 the gallup organization surveyed 1000 adult americans and asked are you a total…

A: We have given thatn1 = 1000 , x1 = 378n2 = 1000 , x2 = 333Significance level (α) = 0.05Now,p̂1 =…

Q: According to the Energy Information Administration (official energy statistics from the U.S.…

A: Mean()=3.16standard deviation()=0.90sample size(n)=30significance level()=0.01

Q: A study was conducted to determine the proportion of people who dream in black and white instead of…

A: Denote p1, p2 as the proportions of all people who dream in black and white instead of color under…

Q: Based on information from the Federal Highway Administration web site, the average annual miles…

A: Determine the statement of the hypothesis. Here, testing whether average miles driven per vehicle in…

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.