What is the approximate standard deviation of the final exam scores?

Q: Suppose 190 geology students measure the mass of an ore sample. Due to human error and limitations…

A: Mean(µ) = 85Standard deviations (σ) = 1X ~ N (µ, σ )= N(85, 1)

Q: percentage of high school students study more than 64 minutes per night?

A: On average, high school students study 43 minutes per night, with a standard deviation of 7 minutes.…

Q: What is the appropriate null hypothesis for this test? b. What is the sample size for this data? c.…

A: a) degrees of freedom for groups is 2. Thus, number of treatments is 3. The hypotheses to be tested…

Q: The average national salary is 45,000 (in this example, 45 represents 45,000). I take a sample of 14…

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Q: Which of the following is a bootstrap sample from the sample values: 5,8, 13, 20, 25, 29

A: Option (ii) is the correct answer.

Q: A random sample of 290 college students was asked if they believed that places could be haunted, and…

A: The question is based on a confidence int. of a popl. prop. Given : Random sample of college…

Q: (a) State the null hypothesis Ho and the alternative hypothesis H1. H, :0 H :0 (b) Determine the…

A: from the provided given information Σd=33The values of differences each value squareΣd2=1131n=10mean…

Q: 4. (Calculating the Standard Deviation Question) Calculate the sample standard deviation of the…

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Q: a. What is the probability that at least one meteor is found 1.. a one-minute interval? b. Determine…

A: here given number of mentor per 30 seconds  = 1.81  here given scenario follow Poisson Process  for…

Q: An industrial plant wants to determine which of two types of fuel, electric or gas, is more cost…

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

Q: 2. Why do we use samples in the collection of data?

A: Sample is a  small group of data that is selected from the larger population.

Q: Complete the following contingency table based on column percentages. Outcome Not successful…

A: Contingency table explains the similarity and dissimilarity between the categorical variable has…

Q: What is the fair price for this game?

A: here given there is total four prizes in box  A player will reach into the box and draw one of the…

Q: Which of the following changes we would expect to result in a reduced interval width (select the…

A: We have given that  The 90% confidence interval is (1000, 2100).

Q: Working as a professor, I may want to try and predict success on a final exam by student success on…

A: (1)   Use EXCEL to obtain the value correlation coefficient r: EXCEL procedure: Go to EXCEL Go to…

Q: A factory owner wants to estimate the average hours lost due to a machine breakdown. Recording for…

A: Given: Sample size, n=9Sample mean, x¯=3.5Sample sd, s=1.5Confidence level=98%

Q: 1- In order to determine the proportion of defects in a shipment, 40 parts from it are randomly…

A: The objective is to identify the sampling method for the given scenario.

Q: A discount airline allows staff 36.0 minutes between flights to clean the aircraft interior. The…

A: Given : Sample size (n) = 40 Sample mean (X¯) = 36.66 Sample SD (S) = 5.56

Q: 7. Following table shows ages of husband and wife of 53 married couples. Wife→ 15-25 25-35 35-45…

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Q: Two points are selected at random on a line of length a. What is the probability that none the three…

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Q: Suppose that we are to conduct the following hypothesis test:   H0:μ=136 H1:μ≠136 Suppose σ is…

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Q: A computer manufacturer is interested in comparing assembly times for two keyboard assembly…

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Q: The Central Limit Theorem says that the standard deviation of the sampling distribution of the…

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Q: Different groups of consumers are intercepted in shopping malls at the end of every month, for a…

A: Panel data is also known as longitudinal data. It is the type of data that is collected over a…

Q: 2. Find the intervals for Z such that P(-z < Z < z) = a. 0.9886 b. 0.7372 c. 0.8354

A: Let z be the standard normally distributed random variable with mean 0 and standard deviation 1

Q: a. Consider the scenarios below and state whether the responses obtained will be bias or unbiased…

A: Here biased means dependent or related to each other and unbiased means not related to each other.

Q: 5. An examinee of the National Medical Admission Test (NMAT) got a percentile rank of 95%. What does…

A: Percentile rank of a given score is the percentage of scores in its  frequency distribution that are…

Q: he time required to play a certain board game is uniformly distributed between 15 and 60 minutes.…

A: Given Information: Consider the given information in which the time required to play a certain game…

Q: 4. An average of 35 fish per day enter the intake pipe of a water treatment plant. A hydraulic…

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Q: The population of a state is an example of what type of variable? Check all the descriptors that…

A: We have given that, The population of a state is an example of what type of variable?  We have to…

Q: Use your cumulative frequency diagram to estimate (i) the median value

A: The provided frequency distribution is Class Frequency (f) cf  16-25 8 8 26-35 32 40 36-45…

Q: I’m interested in assessing whether someone’s resting heart rate (X) is related to how fast they are…

A: The independent variable is Resting Heart Rate. The dependent variable is Finish Time. We have to…

Q: large group of people get together. Each one rolls a die 150 times, and counts the number of aces…

A: Given Data : sample size,n= 150 probability,p= 0.17

Q: A psychology quiz contains eight multiple-choice questions. Let x represent the number of questions…

A: Solution- Given that a quiz contain 8 multiple questions X denote number of a questions  a student…

Q: new coal liquefaction process is being studied. It is claimed that the new process results in a…

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Q: A SAMPLE SIZE OF 36 WAS DRAWN AND ITS MEAN WAS FOUND TO BE 80. TEST WHETHER THIS SAMPLE COULD HAVE…

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Q: Please specify the key problem with this question included in a questionnaire: "When using the…

A: We have to specify the key problem with the question included in the questionnaire: "When using the…

Q: You are a consumer psychologist interested in holidy spending. A national census reports that the…

A: From the provided information, Sample size (n) = 16 Sample mean (x̄) = $85 Standard deviation (s) =…

Q: 3. Use the t-distribution table to determine the value of t to construct confidence interval for the…

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

Q: You believed that sending positive thoughts to your classmates that have been so much bothered with…

A: The data represents the grades of classmates before and after bunch of thoughtful messages are sent…

Q: Suppose a researcher believes that the occurrence of natural disasters such as earthquakes leads to…

A: a) Natural disasters have serious consequences for the well-being of the affected people, with…

Q: Question: a. Test the hypothesis that the average number of siblings of all students in your…

A: Please find the explanation below. Thank you

Q: We are performing a one-tailed hypothesis test for the population mean μ using the following pair of…

A: Given : H0: μ =10.0 vs. Ha: μ &lt; 10.0

Q: Given Hx = 0.10, determine é:10 (10 – year temporary expectation of life). %3D

A: From the given information, μx=0.10   Formula: e°x:n¯|=∫0npxdtt           =∫0ne-μxt dt

Q: In a restaurant, 100 tables had been served. Of these tables, 15 had dish A only, 20 had dish B…

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Q: Find the probability. A 6-sided die is rolled. What is the probability of rolling a number greater…

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Q: a box contain 4 apple candies and 5 orange candies. If Ana will pick one at a random what is the…

A: The number of apple candy is 4 and orange candy is 5. Total number of candy is 4+5 =9 Total number…

Q: Find the critical value given the information below. 1. One-tailed test, variance is known a= 0.05 ,…

A: As per our guidelines we can solve first three sub part of question and rest can be reposted.…

Q: The Human Resource department of Lala firm has summarized the number of service years of their 120…

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Q: Here are summary statistics for randomly selected weights of newborn girls: n = 236, x= 30.3 hg, s=…

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