QUESTION 3 If a random sample of size 15 is drawn from a normally distributed population with mean 23 minutes. What is the probability that the sample mean exceeds 25.905 minutes, if the sample standard deviation is 6.39 minutes? O 0.95 0.0392 O 0.9608 0.05

Q: se the Normal distribution to compute probabilities about the sample proportion of those who…

A: The sampling distribution of the sample proportion is approximately normal with at least 5 expected…

Q: Question 3: A random sample of 55 observations produced a mean value of 28 and a standard deviation…

A: Given  mean=x̄=28, n=55, s=1.3

Q: The annual rainfall in a city is normally distributed with a mean of 128 cm, and a standard…

A: GivenMean(μ)=128standard deviation(σ)=13

Q: Question 26: resting body temperatures are normally distributed with an average of 98.25 degrees…

A: Let X denote the resting body temperatures are normally distributed with an average of μ=98.25…

Q: Question 1: A random variable X is distributed nomally with mean 508 and standard deviation 32. For…

A:

Q: QUESTION 1 The life of an animal is normally distributed with a mean of 9 years and a standard…

A: Given ,sample size(n)=36mean(μ)=9standard deviation(σ)=1.5

Q: (QUESTION 4) For a certain type of computers, the length of time between charges of the battery is…

A: According to the given information in this question We need to find the probability between…

Q: Question 8.1.25-T Assigned Media v The shape of the distribution of the time required to get an oil…

A: Let, X: The time required to get an oil change at a 20 minutes oil change facility. The shape of the…

Q: QUESTION 14 When engaging in weight-control (fitness/fat burning) types of exercise, a person is…

A:

Q: QUESTION 2 The IQ test has a mean of 100 and a standard deviation of 15. Suppose a simple random…

A: The standard error can be calculated as: SE=σn Here, σ = Standard deviation n = Sample size

Q: Question 1: A random variable Xis distributed nomally with mean 508 and standard deviation 32. For…

A: Given problem is :

Q: Question No. 5 "Chief Grill" is a local restaurant, its annual data shows that the average sale of…

A: Given, Mean μ =1200 Standard deviation σ = 102 a) =P(x< 1000)= P ( x- μ /σ < 1000 - μ /σ )=P(z…

Q: QUESTION 21 The lifetime of a new battery used in a digital clock has a mean of 300 days and a…

A:

Q: A random sample of 8 adults aged 30 years were asked how much they spent on medical costs in the…

A: 43 Use EXCEL Procedure to obtain the value of sample mean. Follow the instruction to obtain the…

Q: Exhibit 6-4 The starting salaries of individuals with an MBA degree are normally distributed with a…

A: Given,mean(μ)=$40,000standard deviation(σ)=$5,000

Q: Question 2 Assume that a human pregnancy has a population mean of 280 days and a population standard…

A: Since you have posted a question with multiple sub-parts, we will solve first three subparts for…

Q: Question 9 Two samples, each with n = 200 scores, have a pooled variance of 25. What is the…

A: Given: n1=200, n2=200 and sp2=25

Q: Assume that a human pregnancy has a population mean of 280 days and a population standard deviation…

A: Hello! As you have posted more than 3 sub parts, we are answering the first 3 sub-parts.  In case…

Q: Question 20: The range of a battery of a newly produced Electric vehicle is normally distributed…

A:

Q: QUESTION 19 A random sample of n = 169 scores is selected from a population whose mean = 195 and…

A:

Q: We study the random variable T, which has a Normal distribution with mean -4.2 and variance 3.61.…

A: GivenA random variable T~Normal(μ=-4.2,σ2=3.61)Mean(μ)=-4.2Variance(σ2)=3.61standard…

Q: Question 7.6.10 The average height of women in the US is 63.8 inches, with a standard deviation of…

A: The random variable X be the height of women in the US. Given that   X ~ N (μ=63.8,σ2=4.22)

Q: QUESTION 25 In a five-number summary, which of the following is NOT used for data summarization? O…

A:

Q: Assume that a human pregnancy has a population mean of 280 days and a population standard deviation…

A: Suppose, X be the number of days human pregnancy stays before giving birth. Given that X follows…

Q: Question 6 – The average starting salary of this year's graduates of a large university (LU) is…

A: Hi, thank you for the question. As per our Honor code, we are allowed to attempt first three sub…

Q: QUESTION 9 Suppose that the average annual revenue of a small business is $150,000 with a standard…

A:

Q: The salaries at a corporation are normally distributed with an average salary of $19,000 and a…

A: Solution: Let X be the salary at a corporation. From the given information, X follows normal…

Q: QUESTION 17 The variance of a binomial random variable's distribution equals 8.40, for given values…

A: Introduction :-  Given that X follows Binomial distribution with n = 40 and p = 0.20 We have to…

Q: QUESTION 15 The standard devation for a sample is most kely larger than the standard deviation of…

A: Hey there! Thank you for posting the question. Since there are multiple questions posted, we will…

Q: A bank's loan officer rates applicants for credit. The ratings are normally distributed with a mean…

A: From the information, the mean is 200 and the standard deviation is 50.

Q: QUESTION 5 The distribution of the number of hours of sleep people get per night is unimodal and…

A: Given:Mean=μ=6Standard deviation=σ=1.5Data point=x=4.5   The formula of z-score is as follows:…

Q: receive or send an average of 41.5 text messages per day. A. How many text message users receive or…

A: (A)   If Patients receive 41.5 text messages in 24 hour then Patients will receive 41.524=1.729 text…

Q: QUESTION 4 The national IQ test has a mean of 100 and a standard deviation of 15. Suppose a simple…

A:

Q: Problem 2. Assume that the height of adult women were normally distributed with a mean of 63 inches…

A: If n=36 P(X<62)=?

Q: QUESTION 10 If a random sample of size 14 is drawn from a normally distributed population with mean…

A: Given data: n = 14 Mean = 43.5 Standard deviation = 2.7 To find: What is the probability that the…

Q: QUESTION 4 A sample of size 40 is taken from an infinite population whose mean and standard…

A: We have to find correct answer..

Q: QUESTION 3 The national IQ test has a mean of 100 and a standard deviation of 15. Suppose a simple…

A:

Q: QUESTION 12 What sample size should be used in a study conducted to estimate the average monthly…

A: From the provided information, Population standard deviation (σ2) = 1.96 Confidence level = 99%…

Q: Question 19: The range of a battery of a newly produced  Electric vehicle is normally distributed…

A:

Q: QUESTION 5 A random sample of size n = 25 is drawn from a normal population with a variance of 16,…

A:

Q: Question 6: If the random variable X has a normal distribution with mean 40 and std. dev. 5,…

A: Hello! As you have posted more than 3 sub parts, we are answering the first 3 sub-parts.  In case…

Q: draw a sample of size 30 from a normally distributed population with a standard deviation of four.…

A: Here Sample of size 30 is drawn from NORMAL POPULATION

Q: Question 1: A random variable is distributed normally with mean 3200 and standard deviation 800.…

A:

Q: Exhibit 6-4 The starting salaries of individuals with an MBA degree are normally distributed with a…

A: Let X be the starting salaries of individuals with an MBA degree X~N(μ=40000, σ=5000)

Q: Question 2: A random variable is distributed normally with mean 3200 and standard deviation 800.…

A:

Q: Question 1 In an election, suppose that 60% of voters support a school levy increase. If we poll…

A:

Q: QUESTION 18 Consider a binomial random variable where the number of trials is 12 and the probability…

A: We have to find mean and standard deviation for binomial experiment.

Q: QUESTION 3 The length of an injection-molded plastic case that holds magnetic tape is normally…

A: Given : μ=90σ=2X~N(μ=90,σ2=(2)2) We want to find,P(X<87 or X>93)=?

Q: Pregnancy Length Question 2 The length of human pregnancies from conception to birth varies…

A: Solution: Let X be the length of human pregnancies from conception to birth. From the given…