How many students must be randomly selected to estimate the mean monthly income of students at a university? Suppose we want 95% confidence that x is within $132 of u, and the o is known to be $524. ..... O A. 43 ОВ. 524 O C. 7 O D. none of the other answers O E. 60 OF. 0 O G. 105 О Н. 132

Q: Suppose that the average spending of all customers of a local shop follows a normal distribution…

A: Computation of critical value: 1-α=0.95α=0.05α2=0.0251-α2=0.975 The critical value of z-distribution…

Q: 1. The heights of 200 plants in a garden follow a normal distribution with a mean of 72.3 cm with a…

A: Solution

Q: with a mean of µ = 70 and a standard deviation of σ = 10, what is the probability of obtaining a…

A: Given Data : Population Mean,μ = 70 Population Standard Deviation,σ = 10

Q: The quarterly returns for a group of 68 mutual funds with a mean of ​2.8% and a standard deviation…

A: Given data: Mean =  ​2.8% and standard deviation = 6.8% can be modeled by a Normal model. Based on…

Q: Assuming that the group of students with a grade arithmetic mean of 70 and a standard deviation of…

A:

Q: Considering a c chart with LCL=0.513 & UCL=19.487, what is the probability of detecting the mean…

A: Given LCL=0.513 UCL=19.487 Find The probability of detecting the mean number of nonconformities…

Q: According to the Chebyshev's rule, the proportion of observations within 2.5 standard deviations of…

A:

Q: Suppose that the mean chest size of certain soldiers is 39.8 inches with a standard deviation of 2.2…

A: (d)   Determine the value of chest size measured at least as large as 75% of all Scottish…

Q: Jumbo shrimp are those that require 10 to 15 shrimp to make a pound. Suppose that the number of…

A: From the provided information, Mean (µ) = 12.5 Standard deviation (σ) = 1 X~N (12.5, 1) Here X be a…

Q: Suppose an experiment is run with a sample of 64 items from a population with a mean of 10.2 and a…

A: Here, mean µ = 10.2, the standard deviation, σ = 0.12, and n = 64.

Q: In a distribution with o = 5, a z-score of z = +2.00 corresponds to a location that is 10 points…

A:

Q: 4. The scores on a standardized mathematics test for 8th-grade children in New York State form a…

A:

Q: Suppose samples of size 100 are drawn randomly from a normal population that has a mean of 20 and a…

A: Solution: Let X be the random variable. From the given information, X follows normal distribution…

Q: According to a college survey, 22% of all students work full time. Find the standard deviation for…

A:

Q: For a population with a mean of u=40 and a standard deviation of o=6, find the z-score corresponding…

A:

Q: Suppose a random sample of n = 100 measurements is selected from a population with meanu and…

A: Note: According to Bartleby expert guidelines, we can answer only first question with their three…

Q: In a large population of college-educated adults, the mean IQ is 112 with standard deviation 25.…

A: According to the given information in this question There are two questions according to bartleby we…

Q: A population with u = 85 and o = 12 is transformed into z-scores. After the transformation, what is…

A: When the raw scores are transformed to z-scores the mean will be always equal to 0 and the standard…

Q: If an entire population with μ = 60 and s = 8 is transformed into z-scores, then the distribution of…

A: Given X~N(μ,σ) population mean μ=60 population standard deviation σ=8 The formula for a…

Q: Suppose a population is known to be normally distributed with a mean, µ, equal to 116 and a standard…

A:

Q: Suppose that the mean and standard deviation of plants height are 130 and 42, respectively, if a…

A: We have given that,  X be the random variable from normal distribution with mean (μ) = 130, standard…

Q: 19. What is the standard deviation, o, in the heights of tenth grade girls shown in the table below?…

A:

Q: If the average grade on an exam was 75% and the standard deviation was 4%, what would the three…

A: The mean is 75% and the standard deviation is 4%.

Q: A population of scores has u=55 and o=15.  if 5 points are subtracted from every score in the…

A: The given data is μ = 55σ = 15 Suppose x1, x2, x3, x4, ..., xn are the data points…

Q: This is confusing

A: (a) Convert the given percentages in to probabilities: The below graph shows histogram of the…

Q: chickens follow a normal distribution with a mean of ? kg and a standard deviation of ? kg. It is…

A: *Answer:

Q: Suppose the mean height of Grade 11 male students in a certain school is 170 cm, and that the…

A:

Q: A population has a mean of 80 and a standard deviation of 8. Ai ralue is ndom sa O A. None of the…

A: As the sample size is higher than 30 it can be said that the distribution follows a normal…

Q: The volume of cracker boxes are normally distributed, with a mean of 7 oz and a standard deviation…

A: It is given that:

Q: A research worker wants to determine the average time it takes a mechanic to rotate the tires of a…

A: Given  alpha=0.05, sigma=1.5 MOE=0.3

Q: A sample with M = 85 and s = 12 is transformed into z-scores. After the transformation, what are the…

A:

Q: Suppose the people living in a city have a mean score of 35 and a standard deviation of 9 on a…

A: A normal distribution has a bell shaped which is centred at mean. The standard normal distribution…

Q: It is known that the distribution of the Wechsler Adult Intelligence test is n 130, and the standard…

A: Given, Mean (μ)= 130 Standard deviation (σ)=15

Q: Assume that the monthly food expenditures of families of a certain size in one economic group are…

A: We have to find out given probabiity..

Q: Suppose that the daily intake of an adult follows a uniform distribution from 40 to 65 micrograms.…

A: Solution

Q: According to the Chebyshev's rule, the approximate proportion of observations within 3 standard…

A:

Q: 2) For each group create the 95% confidence interval for the mean grade on the Midterm. How do these…

A: Given: Confidence level = 95% Significance level = 0.05 Formula Used: Confidence interval = X ± tsn

Q: A survey of 1000 women ages 20 to 30 found that their heights were normally distributed, with a mean…

A: (a) From the given information The mean is 65 in. and a standard deviation is 2.5 in. The mean x¯ of…

Q: For a population with a mean of μ= 40 and a standard deviation of σ= 6, find the z-score…

A: From the provided information, Population mean (µ) = 40 Standard deviation (σ) = 6 a) Sample size…

Q: Suppose an experiment is run with a sample of 64 items from a population with a mean of 10.2 and a…

A: The given values are, μ=10.2,σ=0.12,n=64

Q: If an entire population with μ = 60 and o = 8 is transformed into z-scores, then the distribution of…

A: 3. The provided information is  µ=60 σ=8 After normal to  standard normal distribution the mean and…

Q: e that the heights of women are normally distributed with a mean of 63.6 inches and a standard…

A: Mean =63.6Standard deviation = 2.5Sample size = 100

Q: Suppose that the mean and standard deviation of plants height are 130 and 32, respectively, if a…

A:

Q: Suppose that a plaque in an elevator contains the following statement: Maximum weight 3500 pounds or…

A: with a mean of 179.2 pounds and a standard deviation of 29.6 pounds?Suppose that a plaque in an…

Q: A population has a standard deviation of 8. What is the minimum sample size needed to estimate a…

A: Given : Margin of error, ME = 2.0 population standard deviation, σ = 8.0…

Q: A survey of 1000 men ages 20 to 30 found that their heights were normally distributed, with a mean…

A: From the provided information, Mean (µ) = 65 inches Standard deviation (σ) = 2.5 inches

Q: For a normally distributed population with a mean of u = 70 and a standard deviation of o = 10, what…

A: According to the given information, we have Mean = 70 Standard deviation = 10 Sample size, n = 64

Q: 5. In a population with m = 65 and s = 6, Fred is 1 ½ standard deviations above the mean, John's…

A: Hi there! Thanks for posting the question. Since there are multiple questions, we will solve one…

Q: How many students must be randomly selected to estimate the mean monthly income of students at a…

A: Margin of error within population mean (E) = $130, population standard deviation (σ) = $ 520 and…