2 19.2. If the standard deviation of pulse rate in adul- ts of the age group of 20-25 is 9.9, and the normal pulse rate is 69, would you conclude a significant difference at 2% level of significance if a group of 81 people of the same age group suffering from a disease were found tn haye an average pulse rate of 742

Q: o=58. From sample sizes of 36 adults find the proportion of sample means having values of at least…

A: here , sample size  = 36 population  mean = 162 population standard deviation = 58

Q: A sample of n=25 scores has a mean of 68. Find the z-score for this sample. If it was obtained from…

A:

Q: uppose that the resting h stributed with mean 80 a /hat heart rate would a m

A: Let X be a random variable with mean 80 and s.d. 15 that follows a normal distribution. So,…

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A: Given that mean =180 ,s.d =40 P ( 100 <X < 260) = ?

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A: If mean score of 85 ans standard deviation of 5, then Z-score corresponding to given raw score is…

Q: Age at onset of dementia was determined in the general population to be 70 and standard deviation…

A: Given Information: Age at onset of dementia was determined in the general population to be mean 70…

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A:

Q: A simple random sample of 100 observations was taken from a large population. The sample mean and…

A: Given that ,                    sample size n=100                    Mean u=80…

Q: Suppose that pulse rates among healthy adults are normally distributed with a mean of  79…

A: It is given that Mean = 79Standard deviation = 8

Q: we assume the average number of teeth lost in the 5−9 group is 7 teeth and the average number of…

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Q: Suppose 170 geology students measure the mass of an ore sample. Due to human error and limitations…

A: n=170 Mean=86 Standard deviation=3

Q: The t-value of t = fall between -to.95 and to.95 because to.95

A: given that n = 13  sample mean =  1195 sample standard deviation = 169.3  population mean = 1016

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Q: A simple random sample of 64 observations was taken from a large population. The sample mean and the…

A:

Q: A normal population has the mean m=70 and standard deviation 20. what proportion of the population…

A: Obtain the proportion of the population is greater that 95. The proportion of the population is…

Q: Suppose that pulse rates among healthy adults are normally distributed with a mean of 80 beats…

A: Given data  Normal distribution μ = 80σ= 10P(x≤72) = ?

Q: The score on a test have a mean of 100 and standard deviation of 15. If a personnel manager wishes…

A: From the given information we find the cut off score.

Q: A population has a mean of 250 and a standard deviation of 24. What value from the population has a…

A: Solution

Q: A normal population has a mean μ = 40 and standard deviation  of 11. What proportion of the…

A:

Q: Suppose that pulse rates among healthy adults are normally distributed with a mean of 79…

A: Based on the provided information, Mean=79 beats/minute Standard deviation=10 beats/minute

Q: Suppose that pulse rates among healthy adults are normally distributed with a mean of 80…

A: From the given information Mean (µ) = 80 beats/minute Standard deviation (σ) = 10 beats/minute…

Q: The difference in the population means divided by the population standard deviation of a study is…

A: Given that The difference in the population means divided by the population standard deviation

Q: Suppose that pulse rates among healthy adults are normally distributed with a mean of 79…

A: Mean (µ) = 79 beats/minute Standard deviation (σ) = 8 beats/minute Let X be a random variable which…

Q: According to Chebyshev's Teorem, at least what percentage of snake lengths are within K= 2.9…

A: The Chebyshev’s rule states that, for any quantitative data set and any real number greater than k,…

Q: A population has a mean of u=50 and a standard deviation of 0=10. If 3 points were added to every…

A: The properties of mean are:E(X + a) = E( X ) + a * E(X+a)=E(X)+aE(aX)=aE(X)The property of variance…

Q: Suppose the mean and standard deviation of the GPAs of all currently registered students at a…

A: Given data,Mean μ=2.70sd     σ=0.50Antionio’s z score = -0.62Beatrice’s z score = 1.28What are their…

Q: A student conducts an experiment on high temperature steel. The student takes an initial set of 20…

A: Given, Sample size = n = 20 Sample mean = x = 660 Sample standard deviation = s = 15.3 x = 600…

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A:

Q: A random sample of 90 observations produced a mean of ?⎯⎯⎯=26.3 from a population with a normal…

A: The given data: Mean, x¯=26.3 Standard deviation,σ=2.08 Sample of observation, n=90  (a) 90%…

Q: The mean age of a random sample 25 people who were playing the slot machines is 48.7 years, and the…

A: That is, there is no evidence to conclude that the mean age of those playing the slot machines is…

Q: sample of n=16 scores is selected from a population with a mean of 60 and a standard deviation of…

A: given data n = 16μ = 60σ = 24M = 66Z = ?