3. Hypothesis: College students sleep less than the recommended 8 hours. Sample Data: mean = 7.25, standard deviation = 2.1, N = 25.

Q: The height of women ages 20-29 is normally distributed, with a mean of 64 inches. Assume a 2.7…

A: Mean (μ) = 64Standard deviation(σ)=2.7Sample size(n) = 27

Q: What's the standard deviation for the sample data set to 2 decimal places {6.65,10.82,15.83,20.76}

A: It is an important part of statistics. It is widely used.

Q: The amount of corn chips in a 16 - ounce bag by the dispensing machine has a normal distribution…

A: It is given that mean is 16.5 and standard deviation is 0.2.

Q: according to chebyshev's theorem, at least 88.9% of data will be between   Mean=15.4  Standard…

A: Chebyshev's theorem gives the minimum proportion of the data which must lie within a given number of…

Q: Medical research suggests that systolic blood pressure in adults is approximately normally…

A: Denote X as the blood pressure in adults. It is given that X is approximately normally distributed,…

Q: determine the percentile ranks (from their respective z-scores) using the normal curve for Teachers…

A: We want to find z value for given data

Q: professor at a local university noted that the exam grades of her studer istributed with a mean of…

A: Given that.   X~N( μ , ?)   μ=68 , ?=17   Z-score =( x - μ )/?

Q: What does the F-statistic represent in ANOVA? a. The ratio of between-group variability to…

A: The F-statistic in Analysis of Variance (ANOVA) is a key part of this statistical analysis tool.…

Q: 2. The average time spent sleeping (in hours) for a group of medical residents at a hospital can be…

A: Given that  X~N(μ= 6.1 , σ= 1) μ= 6.1 , σ= 1 Formula for Z-score Z=(X-μ)/σ

Q: In a mid-size company, the distribution of the number of phone calls answered each day by each of…

A: Answer: X ~ Normal distribution X~ N (μ, σ) The given values are Mean = μ = 40 Standard deviation= σ…

Q: Five samples of halo halo vendors un barangay uno have a standard deviation of 20 pesos. What is the…

A:

Q: Describe the distribution of sample means (i.e., shape, measure of central tendency and variability)…

A:

Q: Which measure(s) would not be used when you calculate the standard error of the mean? p-values…

A: The standard error measures, roughly, the average difference between the statistic and the…

Q: Determine if the class BMI is significantly higher than the cutoff for a healthy BMI which is 25.

A:

Q: The patient recovery time from a particular surgical procedure is normally distributed with a mean…

A: We have given that.    X~N( μ , ?^2 )    μ = 5.1      , ? = 1.8   Z-score =( x - μ )/?

Q: Calculate the distance for a Sunday skate that would put it in the shortest 1.5% (bottom 1.5%) or…

A:

Q: Renal Disease The mean serum-creatinine level measured in 13 patients 24 hours after they received a…

A: The z test are used to determine the mean significance between the mean and population. It is…

Q: A sample contains years to maturity for 20 corporate bonds. The sample mean years to maturity for…

A: The margin of error tell us how much the estimated value will differ from the real population…

Q: distribution,The average sales = 225. Standard  deviation = 40 The  upper limit for  the  middle…

A: According to the empirical rule, for normal distribution, approximately 68% of the observations fall…

Q: What is the average score for those who are good with time management with the standard deviation?

A:

Q: Determine the minimum sample size needed if we want to estimate the mean age of Camden County…

A: Obtain the required sample size: The given confidence level 100*(1–α)% = 95%. The critical value is…

Q: What is the advantage of considering standard error instead of standard deviation?

A: Standard Deviation: Squared Deviations taken from the mean from each observation is referred to as…

Q: The average time taken for your Internet service provider to remotely resolve a trouble ticket has a…

A: Let X denote the time to remotely resolve a trouble ticket. Given that X follows N(mean = 4.3, SD =…

Q: Among health care workers at a local hospital, the average number of vacation days taken per year is…

A: The mean is 5 and the standard deviation is 2.5.

Q: The patient recovery time from a particular surgical procedure is normally distributed with a mean…

A: Normal distributionPopulation mean : Population standard deviation : Median recovery time = ?

Q: The shaded region under a Normal distribution with mean 50 and standard deviation 2 is shown. Which…

A: Given Data: The graph is of Normal Distribution   Mean=50 Standard deviation=2

Q: Under the normal curve, approximately what percent of scores fall between -2 to -3 standard…

A: The mean and standard deviation of the standard normal distribution are 0 and 1, respectively.

Q: For the given set of data: (98, 56, 59, 56, 73, 67, 67, 67, 70, 64} Determine: (a) Mean (b) Median…

A: Given data is 98,56,59,56,73,67,67,67,70,64Arrange the data in ascending…

Q: c= 0.90 sample mean = 65.36 sample standard deviation =2.3658 find out the confidence…

A: Answer -Given,   c= 0.90          then         α = 1-0.90          ⇒       Zα2 = 1.645…

Q: Resting pulse rates for healthy adults are found to have approximately a Normal distribution with a…

A:

Q: 6-The mean number of hours an American worker spends on the computer is 3.1 hours per workday.…

A: Mean(μ)=3.1 Standard deviation(σ)=0.5

Q: The waist girth of 2,500 employees in a large company follows the normal distribution with mean of…

A:

Q: Assume that adults have IQ scores that are normally distributed with a mean of 100.3 and a standard…

A: Assume that adults have IQ scores that are normally distributed with a mean of 100.3 and a standard…

Q: Response time is an important statistic for measuring the effectiveness of a fire department, and is…

A: Given data,Mean μ=4.5sd σ=1.2P(4<X<6)=?

Q: The Trial Urban District Assessment (TUDA) measures educational progress within participating large…

A: The reading test scores of fourth graders by TUDA. The basic level of reading is 208 for fourth…

Q: given that the sample mean=105, pop standard deviation=27, n=44, a=0.01 what is the critical s-score

A: Note: In this question it has mentioned that we have to find the s – score but it seems that it is a…

Q: The amount of time it takes an athlete to complete a Ninja warrior course is normally distributed…

A: Given that.   X~N( μ , ?)   μ=8.25     , ?=0.4   Z-score =( x - μ )/?

Q: vg canadian worker spends 29.88 minutes driving to work each day. Assume the distribution of driving…

A: Given Information: On average Canadian worker spends 29.88 minutes driving to work each day. i.e.,…

Q: What is the other term for the standard deviation of the sampling distribution of the sample means O…

A: We have given that the statement about to the standard deviation of sampling distribution of sample…

Q: Below are the ages of randomly selected customers in a fast food chain 46 48 29 27 30 31 35 28 29 27…

A:

Q: The admission committee of AUCA enrolls 60% of those who took the exam. If the scores follow a…

A:

Q: What effect does increasing the sample size have on the population standard deviation? I know that…

A: The increase in the size of the sample, decreases the population standard deviation. This happens…

Q: Home prices in a city have mean = $194,000 and standard deviation = $20,000. For n = 25 randomly…

A: population mean ()=194000standard deviation()=20000sample size(n)=25Mean()=198000

Q: The population average for SAT scores is known to be 500 with a standard deviation of 100. This…

A: Null Hypothesis: A hypothesis which is tested for plausible rejection is called the Null Hypothesis…