The heights of American adult males are normally distributed with a mean of 177 cm and a standard deviation of 7.4 cm. Use the Empirical Rule to find the range of heights that contain approximately (a) 68% of the data

Q: A manufacturer of hard safety hats for construction workers is concerned about the mean and the…

A: Given information Population mean, µ = 800 pounds Population standard deviation, σ = 40 pounds…

Q: One year Thomas had the lowest ERA​ (earned-run average, mean number of runs yielded per nine…

A: We have given that  X~N( μ , ?^2 )   Z-score =( x - μ )/?

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A:

Q: Heights of men in America are usually a mean of 69.1 inches, with an SD of 2.67 inches. Women are…

A: Z score is given by,

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A: The claim is that the mean time to sleep is less for the new drug. The hypotheses can be constructed…

Q: chiatrist reads that the average age of someone who’s first diagnosed with schizophrenia is 24…

A: The one-sample z test is used when the population standard deviation is known. The one-sample z-test…

Q: Adult Great Basin rattlesnakes have a mean length of 33.6 inches and a standard deviation of 4.8…

A: GivenFor Adult Great Basin rattlesnakesMean(μ)=33.6standard deviation(σ)=4.8sample size(n)=36For…

Q: In an experiment to test the effectiveness of a new sleeping aid, a sample of 12 patients took the…

A: From the provided information,

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A:

Q: it is claimed that personal vehicle is driven 24500 km per year. would you agree with this claim if…

A:

Q: Hazel and Luna are in different sections of MTH 134, They both took Test 1 and their instructors…

A: We need to find the z score of the both in order to compare there performance Formula for z score is…

Q: Steve believes that his wife’s cell phone battery does not last as long as his cell phone battery.…

A:

Q: One year Sam had the lowest ERA (earned-run average, mean number of runs yielded per nine innings…

A: From the provided information, The mean and standard deviation for the males ERA are as follow: Mean…

Q: Suppose the scores of students on an exam are normally distributed with a mean of 458 and a standard…

A: Using empirical rule of probabilityfor normal distribution.which is  68% data cover by μ±σ 95%…

Q: anufacturer claims that their bulb had a better performance with an average life span of 40 months…

A: Given: China Population mean μ1 =40 Population standard deviation σ1=3.5 x1 = 42 X1 ~ N (40, 3.52)…

Q: A research report claims that mice with an average life span of 32 months will live to be about 41…

A: Null Hypothesis: H0:  μ>=41  Alternative Hypothesis:  H1: μ<41  Given Information:…

Q: The historical reports from two major networks showed that the mean number of commercials aired…

A: Solution: State the hypotheses. Null hypothesis: That is, the average number of commercials aired…

Q: The student academic group on a college campus claims that freshman students study at least 2.5…

A: The provided information are:

Q: A researcher is conducting a study to determine the mean trough dosage of medication for a…

A: The following information is provided that is required to compute the sample size: Required…

Q: The manager of a computer help desk operation in Moncton has collected enough data to conclude that…

A: We have given that,  Let X be the random variable from normal distribution with mean call time μ,…

Q: The quality-control manager at a light bulb factory needs to determine whether the mean life of a…

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Q: seems these days that college graduates who are employed full-time work more than  40 -hour weeks.…

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Q: he producer of a weight-loss pill advertised that people who use the pill lose, after one week, an…

A: Given data,Mean μ=1.85Standard deviation σ=0.95If n=60P(X≥1.9)=?

Q: A national grocery store chain wants to test the difference in the average weight of turkeys sold in…

A: The following information has been given: n1=20             n2=24x¯1=17.53       x¯2=14.89s1=3.2…

Q: Your grandmother claims that the baby boomer generation is thriftier than the millennials and that…

A: Sample Size Sample mean Sample S.D Sample 1 n₁ = 12 x̅₁ = 26.97 s₁ = 14.6 Sample 2 n₂ =17 x̅₂…

Q: It seems these days that college graduates who are employed full-time work more than 40-hour weeks.…

A: Given data is appropriate for testing of hypothesis to test t-test for single mean. because it is a…

Q: A researcher is conducting a study to determine the mean trough dosage of medication for a…

A: From the provided information, Population standard deviation (σ) = 40 mg Margin of error (E) = 10 mg…

Q: A particular brand of tires claims that its deluxe tire averages at least 50,000 miles before it…

A: Null hypothesis: H0: μ ≥ 50,000. Alternative hypothesis: H1: μ <50,000. Here, the sample mean,…

Q: Steve believes that his wife's cell phone battery does not last as long as his cell phone battery.…

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Q: The VP of HR for a large company is interested in the distribution of sick leave hours for employees…

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Q: The scores on the Law School Admissions Test (LSAT) are normally distributed with a mean of 150 and…

A: Determine the lowest LSAT test score that an applicant would have to have to make this cutoff.   The…

Q: It seems these days that college graduates who are employed full-time work more than 40-hour weeks.…

A: The independent variable is respondents. The dependent variable is the number of hours worked per…

Q: The finish times for women in the 25-29 age group of the Hermosa Beach Triathlon in California are…

A: a).Given, For women, μw=5261σw=807 For men, μm=4313σm=583 Using empirical rule, the required middle…

Q: It has been found that with the standard dosage of a drug, the change in people’s uric acid levelis…

A: Given X is normal Distributed with mean µ = 240.0 and standard deviation σ = 60.0 now will using…

Q: The lifetimes of Brand A tires are distributed with mean 43,000 miles and standard deviation 4600…

A: Hi, you have posted multiple question in one time. As, per the guidelines i am obliged to answer…

Q: A manufacturer of hard safety hats for construction workers is concerned about the mean and the…

A:

Q: The manufacturer of a particular brand of tires claims that its deluxe tire averages at least 50,000…

A:

Q: Steve believes that his wife's cell phone battery does not last as long as his cell phone battery.…

A:

Q: The sample mean weight of 100 chimpanzees was measured to be 82.4 pounds, with a standard deviation…

A: The confidence interval is given as x-Zα2sn≤μ≤x+Zα2sn The given constants are…

Q: Supposed the price of paid apps for a certain category is normally distributed with the mean of $3.5…

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Q: If New York City has a mean gasoline price of $307 with a standard deviation of $19; while Hawaii…

A: Given that: Mean and standard deviation of New York City: μ1=307σ1=19 Mean and standard deviation of…

Q: Kurtis is a statistician who claims that the population mean annual salary of an employee in…

A: Test hypothesis:Denote the population mean annual salary of an employee in the city of Yarmouth as…

Q: It seems these days that college graduates who are employed full-time work more than 40-hour weeks.…

A: The claim of the test is that the population of hours worked per week by college graduates employed…

Q: The heights of 10 year old American children are normally distributed with a mean height of 4 feet…

A: From the provided information, Mean (µ) = 53 inches Standard deviation (σ) = 4.5 inches Let X be a…

Q: It is claimed that personal vehicle is driven 24500 km per year. Would you agree with this claim if…

A: Given data: Population mean = 24500 Sample size = 100 Sample mean = 28000 Sample standard deviation…

Q: Suppose that a report by a leading medical organization claims that the healthy human heart beats an…

A: The summary of statistics is, x¯=76,s=13,n=85,μ=72

Q: Are low-fat diets or low-carb diets more effective for weight loss? A sample of 78 subjects went on…

A: Hypotheses for the test is given below: This test is a two-tailed test. The test statistic for…

Q: The Ilfetimes of Brand A tires are distributed with mean 45,000 miles and standard deviation 4500…

A: Given, The Lifetimes of Brand A tires are distributed with mean 45,000 miles and standard deviation…

Q: A survey found that women's heights are normally distributed with a mean of 62.7 inches and a…

A: Given: Let X denotes heights of women then  μx=62.7  &  σx=3.7   and let Y denotes heights of…

Q: A survey in San Diego was given and found that the mean commute time in 2014 was 26.5 minutes. A…

A: