Using traditional methods, it takes 11.5 hours to receive a basic flying license. A new license training method using Computer Aided Instruction (CAI) has been proposed. A researcher used the technique with 2020 students and observed that they had a mean of 11.6 hours with a standard deviation of 1.6. A level of significance of 0.1 will be used to determine if the technique performs differently than the traditional method. Assume the population distribution is approximately normal. Make the decision to reject or fail to reject the null hypothesis. Is it a reject null hypothesis or is it a fail to reject null hypothesis

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A: We have given that  Sample sizes n1=13      , n2=12        Sample means X̄1= 1.76      , X̄2= 2.27…

Q: A study finds that the carapace length of an adult spider is normally distributed with a mean of…

A:

Q: Many people consider their smart phone to be essential! Communication, news, Internet,…

A: Given information Mean µ = 12.75 hours Standard deviation σ = 2.1 hours

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A: 1. From the given information, the claim of the test is the mean age of entering prostitution in…

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A: Given that: Population mean, μ=5 Population standard deviation, σ=1.3 Sample mean, x¯=5.6 Sample…

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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,

Q: A. Missouri has an inmate suicide rate of 12. How many standard deviations from the national mean is…

A: A. The z score formula is, z=x-μσ In the formula x is defined as random variable, μ is population…

Q: CetaceaNow is a conservationist organization that monitors the health of whale and dolphin…

A:

Q: Studies show that gasoline use for compact cars sold in the United States is normally distributed,…

A: Given that gasoline use for compact cars sold in the United States is normally distributed, Mean =…

Q: The mean annual income of certified welders is normally distributed with a mean of $50,000 and a…

A: Solution: The shipbuilding association wishes to find out whether their welders earn more or less…

Q: Omni Physical Therapy Centers is evaluating two different two different physical conditioning…

A: Given: Program A is taken as group 1. Program B is taken as group  2.…

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Q: Recent recommendations suggest 60 minutes of physical activity per day. A sample of 50 adults in a…

A: State the hypotheses. That is, there is no evidence that the physical activity significantly less…

Q: A study was conducted to determine the effectiveness of hypnotism on reducing pain. Using standard…

A: Sample 1(before hypnosis): n1=8x¯1=8.713s1=2.177 Sample 2(after hypnosis): n2=8x¯2=5.588s2=2.608

Q: Using traditional methods, it takes 9.0 hours to receive a basic flying license. A new license…

A: Given information- Hypothesized mean µ = 9.0 hours Sample size (n) = 17 Mean x̅ = 9.2 hours Standard…

Q: Suppose the average golfer drives the ball around 225.55 yards with a standard deviation of 8.82.…

A: Assume that the random variable x denotes the distance of balls drove by the golfer.

Q: Music streaming services are the most popular way to listen to music. Data gathered over the last 12…

A:

Q: Using traditional methods, it takes 9.7 hours to receive a basic driving license. The new license…

A: Given a sample of 13 students with sample mean 9.8 hours and standard deviation 1.8.level of…

Q: Law enforcement wants to know typical driver speeds in front of a school when children are present.…

A: The given average speeds for a week are: 37, 34, 38, 35, 34. For the distribution of measured speed…

Q: The Weston Rescue Service and the Mid-Valley Ambulance Service are tested for response times. A…

A: Provided information is, the Weston Rescue Service and the Mid-Valley Ambulance Service are tested…

Q: Women's height are normally distributed with a mean of 63.7 inches and a standard deviation of 2.9.…

A:

Q: Suppose the average golfer drives the ball around 259.1 yards with a standard deviation of 9.73.…

A: Solution

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A: Given that, mean(μ)=10.25 standard deviation(σ)=2.3

Q: The Insure.com website reports that the mean annual premium for automobile insurance in the United…

A: Given n=sample size=25x¯ =sample mean= $1425s=sample standard deviation= $170 a) The null and…

Q: An advocacy group claims that the mean braking distance of a certain type of tire is 75 feet when…

A: According to the provided information,

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

Q: Do students who are members of fraternities or sororities have GPAS alfferent from the student body…

A: μ=2.59,s=0.34,x¯=2.47,n=123Decision rule: When p value< level of signicance,then reject the null…

Q: Conservationists working in the Antarctic keep a close eye on the physical characteristics of King…

A: Given information- Population mean, μ = 15.4 kg Sample size, n = 35 Take significance level, α =…

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Q: The historical data of Velvetta Inc., a healthcare products manufacturer, have shown that in a…

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Q: the average reoair cost of a microwave oven is $55, with a standard deviation of $8. the costs are…

A: Solution: Let X be the cost. From the given information, X follows normal distribution with mean…

Q: Women's height are normally distributed with a mean of 64.7 inches and a standard deviation of 3.1.…

A: Given that.   X~N( μ , ?)   μ=64.7     , ?=3.1   Z-score =( x - μ )/?

Q: (b) What is the sample mean in hours per week? xhours per week What is the test statistic? (Round…

A: The data shows the 40 married couples hours per week the husband spends on child care.

Q: Are low-fat diets or low-carb diets more effective for weight loss? A sample of  77  subjects went…

A: Given that  Given that    Sample sizes n1=77      , n2=79        Sample means X̄1= 4.7     , X̄2=2.6…

Q: The average American consumes 82 liters of alcohol per year. Does the average college student…

A: Given,sample size(n)=15sample mean(x¯)=73.1standard deviation(s)=15degrees of…