In a survey, 12 people were asked how much they spent on their child's last birthday gift. The results were roughly bell-shaped with a mean of $45 and standard deviation of $8. Find the margin of error at a 98% confidence level. Give your answer to two decimal places.

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A: Given that  Sample size n =64 Sample mean =32 Population mean =36 Standard deviation =11

Q: A certain type of thread is manufactured with a mean tensile strength of 71.8 kilograms and a…

A: Solution  Given That , A certain type of thread is manufactured with a mean tensile strength of 71.8…

Q: Evaluate the following formula for x₁ = 27.9785, x₂ =25.5651, H₁-H₂ = 0, sp = 43.29, n₁ = 41, and n₂…

A: Givenx1=27.9785x2=25.5651sp=43.29n1=41n2=43μ1-μ2=0

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A: The following information has been given: Class Interval Frequency 151 - 160 8 141 - 150 12…

Q: If n=23, ¯xx¯(x-bar)=31, and s=9, find the margin of error at a 99% confidence level Give your…

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A: a) Frequency, relative frequency and percent frequency: Category Frequency(number of times…

Q: Can you help me find the following?   (a) The p-value for x⎯⎯=66x¯=66 is closest to: 0.02 or 0.24…

A: Given: Null Hypothesis H0:μ=50 Alternative Hypothesis  Ha:μ>50

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A: The mean is 496 and the standard deviation is 115.

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Q: A store randomly samples 603 shoppers over the course of a year and finds that 142 of them made…

A: Given data: n = 603 X = 142 95% Confidence interval= (0.2016, 0.2694)

Q: ssume that a sample is used to estimate a population mean μ. Find the margin of error M.E. that…

A: Given that  Sample size (n) = 10 Sample mean (x¯) = 77.7 Sample standard deviation (s) = 15.9…

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A: The objective is to state the null and alternative hypotheses for the given scenarios.

Q: he equation of the linear regression line is: y = + & (Please show your answers to two decimal…

A: (f)   Use EXCEL to determine the regression equation.   EXCEL procedure:   Go to EXCEL Go to…

Q: The area under the standard normal curve between z = -1.12 and z = 1.12 is 0.7372 0.3643 -0.3686…

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Q: A decade-old study found that the proportion, p, of high school seniors who believed that "getting…

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Q: a) Define the type of the data b) Create the frequency, relative frequency table, and a histogram…

A: The given data indicates heartbeat readings of 23 patients.

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Q: The critical values separate the rejection region from the non-rejection region. True False

A: Given Statement: The critical values separates the rejection region from the non-rejection region.

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A: Given that x=hours of study per week y=final exam score a=6.59 b=21.22

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A: Correlation is used to measure the association between two numerical variable. It explain the degree…

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A: From the provided information, Mean (µ) = 41 Standard deviation (σ) = 10

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Q: 4. Medicinal value of plants. Sea buckthorn (Hippophae), a plant that typically grows at high…

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Q: The mean SAT score in mathematics is 538. The standard deviation of these scores is 35. A special…

A: Hi! Thank you for the question, As per the honor code, we are allowed to answer three sub-parts at a…

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Q: Overproduction of uric acid in the body can be an indication of cell breakdown. This may be an…

A: Given: Sample size n = 11 Sample mean X = 5.31 Population standard deviation σ = 1.93 Confidence…

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Q: Suppose the observational units in a study are the patients arriving at an emergency room on a given…

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Q: A wholesaler furnishes products to 10 retail stores. Each of them can send an order for the next day…

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Q: What is the standard deviation of a coin tossed 100 times resulting in 40 heads and 60 tails

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Q: Engineers must consider the breadths of male heads when designing helmets. The company researchers…

A: Given Information: Mean μ=6.4 Standard deviation σ=0.9 The helmets will be designed to fit all men…

Q: A decade-old study found that the proportion, p , of high school seniors who believed that "getting…

A: Givenx=198n=230p^=xn=198230≅0.8609significance level(α)=0.05

Q: A recent study of 25 students showed that they spend an average of $18.53 for gas per week. The…

A: Given: Sample size n = 25 Sample mean X = 18.53 Sample standard deviation s = 3

Q: Listed below are numbers of Internet users per 100 people and numbers of scientific award winners…

A: The following information has been given: Internet Users (x) Award Winners (y) 81 5.5 78.2…

Q: What is the p-value for this hypothesis test for independence? Based on the p-value using the…

A: Given that                Level of significance=0.05 We have to conduct hypothesis testing of the…

Q: An urn contains n white balls, m black balls and I red balls, which are drawn at random one at a…

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Q: Workers at a particular mining site receive an average of 35 days paid vacation, which is lower than…

A: Option (d)  is the correct answer.  He should fire the employees who have the least number of days…

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Q: how many samples out of 100 would you expect to not include the true population mean within their…

A: here given ,  confidence level =  90%  sample size  = 100

Q: Supposed the Mean percentage in algebra shoe is 70% and the standard deviation is 8% what percentage…

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Q: Using the central limit theorem, what is the distribution of sample means when the population…

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

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A: Given that Sample size n =940 Sample mean =48.1 Standard deviation =11.3

Q: What hypothesis testing procedure should you use to answer these questions? Assume all samples are…

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Q: The null and alternate hypotheses are:   H0 : μd ≤ 0 H1 : μd > 0   The following sample…

A: The t test are used to measure the mean significance between the sample and population. The t test…

Q: Seventy-three percent of a sample of 1000 students drive a used car as opposed to a new car or no…

A: Given: Proportion  = 73 % Confidence level  = 80 %