Az The sample of size n = 87 Is drawn from a population whose standard deviation 189 Find The margin of ERROV for a 90% Confielence Interat

Q: An article presents the results of a study in which the weights of 295 eggs from 27 week-old…

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Q: The time required for a patient to get COVID19 test is normally distributed with a mean of 20…

A: Given,mean (μ)=20standard deviation (σ)=5

Q: Assume that weights of adult females are normally distributed with a mean of 76kg and a standard…

A: normal distribution μ = 76σ = 22 n = 100

Q: The average age of dogs owned by residents in a small retirement community is 7.5 years with a…

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Q: Question 5. (CHILDHOOD NEVER COMES BACK) Bubba bought a bubble blower machine which produced 3125…

A: Question 5. The symmetric bell shaped curve is, The proportion of bubbles have age more than 17…

Q: 4.14 Find the proportion X of individuals who can be expected to respond to a certain mail-order…

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Q: A random sample of 78 eighth grade students scores on a national mathematics assessment test has a…

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Q: Suppose a geyser has a mean time between eruptions of 69 minutes. Let the interval of time between…

A: According to the answering guidelines, we can answer only three subparts of a question and the rest…

Q: A fast food outlet claims that the mean waiting time in line is less than 3.4 minutes. A random…

A: Hypothesis, Ho: the mean waiting time in line is less than 3.4 minutes. (mu<3.4) H1: the mean…

Q: A sample of 64 observations was taken from a population with a variance of 14,4000. From the sample…

A: The standard deviation is a measure of dispersion, which is used to test the variation in the data.…

Q: hich bell curve would have a wider width? A bell curve with a standard deviation of 20 or a bell…

A: Given:First curve- SD=20Second curve- SD=1 Curve with wider width=?

Q: The mean age of a random sample of 35 people who were playing the slot machines is 48.7 years with a…

A: We have written given information with usual notation, Let xs denotes the playing the slot machine…

Q: Find the standard error of the sample mean such that we have 50 random samples with mean 30 and…

A: Number of random samples,  Mean=30 Standard deviation,

Q: Find a 95% CI on the population standard deviation of speeds of drivers ticketed in a 55 mph zone…

A: Confidence interval population standard deviation :  A confidence interval is an statistical…

Q: The standard error of the mean will change among mutliple samples even if the standard deviation and…

A: The standard error of the sample mean is given as follows  SEM = σn

Q: A random sample of size 36 drawn from the population of a known mean of 50 and standard deviation of…

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Q: At ? = 0.10, can it be concluded that there is a difference in means of hours spent for studying…

A: When we assumed population variances are unequal then the two sample t- test formula is defined as…

Q: An applicant must have a systolic blood pressure in the 50% of the metal range. If the systolic…

A: The objective of this question is to find the upper and lower limits of blood pressure for a person…

Q: The mean and standard deviation of the tax value of all vehicles registered in NCR are u=550,000 and…

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Q: At ? = 0.10, can it be concluded that there is a difference in means of time spend for studying…

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Q: a random sample of 100 medical shool applicants at a university has a mean total score of 502 on the…

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Q: Find the standard error of the sample mean such that we have 60 random samples with mean 25 and…

A: Sample size(n)=60mean=25standard deviation(s)=13

Q: Find the standard error of the sample mean such that we have 70 random samples with mean 40 and…

A: Sample size (n) = 70mean = 25standard deviation (s)

Q: An SRS of size 10 is drawn from a population that has a normal distribution. The sample has a mean…

A: Define a random variable X, is the variable of interest.

Q: Suppose the sediment density (g/cm) of a randomly selected specimen from a certain region is…

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Q: Birth weights at a local hospital have a Normal distribution, with a mean of 110 oz and a standard…

A: The Z-score of a random variable X is defined as follows: Z=(X–µ)σ Here, µ and σ are the mean and…

Q: Which have a small standard deviation here ?

A: Standard deviation is the square root of variance of data

Q: The average age of trees in a large local park is 60 years with a standard deviation of 2.2 years A…

A: Given data,μ=60σ=2.2If n=4P(X<60.1)=?

Q: a series of 20 samples of size 4 has been drawn from a project. the measure of interest has an…

A: From the provided information, A series of 20 samples of size 4 has been drawn from a project.…

Q: The mean age of a random sample of 70 adults is 55yrs with SD=7yrs •Find a 95%CI, 90% & a 99%

A: Given,sample size(n)=70sample mean(x¯)=55standard deviation(s)=7degrees of freedom(df)=n-1df=70-1=69

Q: A certain type of thread is manufactured wen a mean tensile strength of 75.3 klograms and a standard…

A: For a derived population with mean (i.e., the mean tensile strength) μ and standard deviation (i.e.,…

Q: The average local cell phone call length was reported to be 2.27 minutes. A random sample of 10…

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Q: A random sample of 10 subjects have weights with a standard deviation of 10.9654 kg what is the…

A: It is given that the standard deviation is 10.9654 kg.

Q: A random sample of sizen=20 has the mean 20 and standard deviation 5. What is the standard error of…

A: It is given that, Standard deviation,σ=5 Sample size, n=20

Q: samples with sample size of 5 are drawn form a normal population with a mean of 100 and standard…

A: given data  normal distribution μ = 100σ = 1.5sample size n = 5Mean of the sample means = ? Standard…