14. Find the pooled estimate of the standard deviation if n1 = 18, n2 = 14, S1= 3.3, and S2= 2.5. (Write two decimal places)
Q: A dish contains 4 blue and 3 red M&Ms. You grab 4 M&Ms from the dish. X is the number of red M&Ms…
A: Given : A dish contains : 4 blue and 3 red M&Ms
Q: Which of the following is the value of x if in a normal distribution the z – score is -1.25, the…
A: According to the given information, we have Z score = -1.25 Mean = 60 Standard deviation = 9
Q: .Suppose a population is known to be normally distributed with a mean, u, equal to 144 and a…
A: Given data,μ=144σ=27P(90<144)=?
Q: The average test score in a particular class is m=30. If you scored a 40 and the class (sample)…
A: Introduction: Denote the score of a randomly selected student in a class as X. It is given that the…
Q: The following data are the distance from the workplace (in miles) for the 6 employees of a small…
A: XX220400864151441936124525∑x=66∑x2=998
Q: A sample consists of the following n = 5 scores: 10 4 3 7 3 Compute the mean and standard deviation…
A:
Q: In this problem, we explore the effect on the standard deviation of adding the same constant to each…
A: Solution: b. The given data set is 5, 8, 15, 13, 5 The standard deviation is
Q: A test is normally distributed with a mean of 70 and a standard deviation of 8. (a) What score would…
A: a What score would be needed to be in the 58th percentile. Therefore, the score at 85th percentile…
Q: Suppose that, for a certain mathematics class, the scores are normally distributed with a mean of 75…
A: We have to fill given blank in probability distribution table...
Q: Refer to the accompanying table, which describes the number of adults in groups of five who…
A: From the provided information, x P (x) 0 0.171 1 0.364 2 0.316 3 0.113…
Q: Seth asked a random sample of 20 students how much cash they had in their pocket. The following…
A: Standard Deviation: It is a statistical measure that measures the dispersion of the dataset from the…
Q: Suppose the mean of a math exam score is 70 with a standard deviation of 12. If each score is…
A:
Q: Ten percent of the world's population is left-handed. A researcher claims that left-handed…
A:
Q: The residents of two towns both have a mean income of $30,000. Town A has a standard deviation of…
A: Since you have posted a question with multiple sub-parts, we will solve first three sub-parts for…
Q: Find the pooled estimate of the standard deviation if n1 = 18, n2 = 14, S1= 3.3, and S2= 2.5.…
A:
Q: A population has a mean of μ = 65 and a standard deviation of σ = 15. a. If you select a random…
A: From the provided information, Population mean (µ) = 65 Population standard deviation (σ) = 15 a)…
Q: Here are the number of hours that each of a group of students studied for this exam: 2 4 22 2 1 4 1…
A: Solution Number of samples (n) = 10 Let "X" be the number of hours that each of a group of students…
Q: The following table shows the number of people that have either 0, 1, 2 or 3 cars registered in…
A:
Q: A college professor calculates the standard deviation of all the grades from the midterm exams she…
A: Standard deviation: The standard deviation indicates by how much each observation differs from a…
Q: Refer to the accompanying table, which describes the number of adults in groups of five who reported…
A: Given : See the excel table
Q: Find the standard deviation, σ, for the binomial distribution which has n = 48 and p = 3/5. Round…
A: Given: n = 48 p=35
Q: A researcher wishes to determine how much money per week is spent on groceries in a small Western…
A: Given : ME< 3.0 σ= 18.0 At 98.0 % confidence level , z score= 2.326 Need to find the minimum…
Q: For a sample of n = 20 scores, X = 25 corresponds to z = -1.20 and X = 40 corresponds to z = +1.80.…
A: Given information: The sample size, n is 20. When, X=25 the corresponding Z is -1.20 When X=40 the…
Q: In one town, the number of pounds of leafy greens consumed per person per year has a mean of 10…
A: (1) Standardized z-score: The standardized z-score represents the number of standard deviations…
Q: Suppose 30% of the people in your town talk on their cell phones and drive at the same time. If you…
A: we have to find standard deviation.
Q: According to the Nielsen Company the mean number of TV sets in a US household in 2013 was 2.24.…
A: Let X is the number of TV sets in US households.
Q: A nutritionist claims that the mean tuna consumption by a person is 3.6 pounds per year. A sample of…
A: Given, A nutritionist claims that the mean tuna consumption by a person is 3.6 pounds per year. A…
Q: Suppose a population is known to be normally distributed with a mean, µ, equal to 144 and a standard…
A:
Q: For the medical study, a researcher wishes to select people in the middle of 40% of the population…
A: Solution
Q: Suppose a 60-watt light bulb produced by a company has a mean life of 750 hours with a standard…
A: Let us assume the population mean and standard deviation for a distribution is μ and σ. Let a sample…
Q: SEM for a sample of size 100 and standard deviation of 5.6 is equal to? a - 14/25 b 23/100 c…
A: Given: Sample size (n) = 100 Standard deviation = 5.6
Q: Suppose a population is known to be normally distributed with a mean, μ, equal to 144 and a standard…
A: Solution: Let X be the random variable. From the given information, X follows normal distribution…
Q: 2. Use the following data obtained from ages of the last six U. S. Presidents at the time of their…
A:
Q: Suppose that the scores of a history test are normally distributed with a mean of 565 and a standard…
A: As per Bartleby guideline expert have to answer first three subparts only..
Q: 2. The average number of customers that visited a particular store during the past year is 160 per…
A:
Q: Suppose a population is known to be normally distributed with a mean, μ, equal to 116 and a standard…
A: The empirical rule says that for normal distribution, 68%, 95%, and 99.7% of the values lie within…
Q: find the range and standard deviation, round to two decimals places: The table below gives the…
A:
Q: Find the mean, p, for the binomial distribution which has the stated values of n and p. Round answer…
A: As per company guidelines I solved only First questions..thank you
Q: f the population standard deviation is 8, at 95% CL, sample mean is within 4 of the population mean…
A: Given data,E=4σ=8z value at 95% confidence is Zc=1.96n=?
Q: A distribution of numbers is approximately bell shaped. If the mean of the numbers is 129 and the…
A: a. The two numbers that would fall approximately between 68% of the given values are, Thus, the two…
Q: Assume that IQ scores are normally distributed with a mean of 100 and standard deviation of 15. If a…
A: It is given that the mean is 100 and the standard deviation is 15.
Q: Suppose a population is known to be normally distributed with a mean, μ, equal to 144 and a standard…
A: From the provided information, Mean (µ) = 144 Standard deviation (σ) = 27 X~N (144, 27)
Q: Suppose that the score in Mathematics exam is normally distributed with a mean of 20 and a standard…
A:
Q: The following table shows the number of people that have either 0, 1, 2 or 3 cars registered in…
A:
Q: Calculate the standard deviation of the data shown, to two decimal places 6.3 28.2 24.9 23.7 5.7 2.7…
A:
Q: What is the observed value for the 98th percentile of a population with a mean of 2.5 and a standard…
A:
Q: The average score on a communications exam was found to be 82 with a standard deviation of 5 points.…
A: From the provided information, Mean (µ) = 82 Standard deviation (σ) = 5 X~N (82, 5) Here X be a…
Q: Sixteen percent of the world's population is left-handed. A researcher claims that left-handed…
A: a) mean (p) = 0.16 , q = 1 - 0.16 = 0.84 , n =2100
Q: Seth asked a random sample of 20 students how much cash they had in their pocket. The following…
A:
Q: A dish contains 3 blue and 4 red M&Ms. You grab 3 M&Ms from the dish. X is the number of red M&Ms…
A: Given data: The number of blue M&Ms is B=3. The number of red M&Ms is R=4. The number of…
Step by step
Solved in 3 steps with 1 images