The following data show the costs charged by a tax preparation service for a random sample of 15 tax returns Complete parts a through c 3110 135 385 195 $110 €180 140 3120 $145 205 140 2145 100 275 $70 CODE a. Using a 95% confidence interval, estimate the average cost of the service for preparing a tax return for a customer The 95% confidence interval is from $ to $ (Round to two decimal places as needed Use ascending order)

Q: Determine μx Px and ox μ = 61, o = 10, n = 31 = from the given parameters of the population and…

A: n=31, standard deviations σ=10, population mean μ=61

Q: The following data represent crime rates per 1000 population for a random sample of 46 Denver…

A: We have given the data representing crime rates per 1000 population for a random sample of 46 Denver…

Q: In the state of Missouri, there are 229 eight year olds diagnosed with ASD out of 18,450 eight year…

A: x1 = 229 n1 =18450 x2 = 47 n2 = 2202 Confidence  level  95% p1 = x1/n1 = 229 / 18450 = 0.01241 p2 =…

Q: Solve the problem. An economist conducted a hypothesis test to test the claim that the average cost…

A: Answer: From the given data, The hypotheses are: H0: μ = 7.15 H1: μ < 7.15 This is a left tailed…

Q: Consider the following list of Xi, Yį values: X₂ Y₂ 2 2 4 3 6 123 2 Using the above data, determine…

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

Q: earchers selected 878 patients at random among those who take a certain widely-used prescription…

A: Sample size n =878 Favorable cases x =17 Sample proportion p^=x/n  =17/878 =0.0194

Q: In the state of Kentucky, there are 228 eight year olds diagnosed with ASD out of 18,462 eight year…

A: In the state of Kentucky, there are 228 eight year olds diagnosed with ASD out of 18,462 eight year…

Q: els of cooperation among persons contacted in surveys and this brings concerns to pollsters. A…

A: Given data:   Agreed to respond Refused to respond Total 18-21 years 88 16 104 22-29 years…

Q: Use the Student's t distribution to find tc for a 0.99 confidence level when the sample is 11.

A: Answer:- Given, Confidence level = 0.99 So, Level of significance, α = (1-0.99) = 0.01  Sample size,…

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A: The International Air Transport Association surveys business travelers to develop quality ratings…

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A: The standardised normal score is Z score.

Q: Suppose the manager of a shoe store wants to determine the current percentage of customers who are…

A: Confidence level: 1-α=0.92 Margin of error: E=8% or 0.08

Q: You have taken a random sample of size from a normal population that has a population mean of -tee…

A: Sample size n=18 Population mean μ=100 Population standard deviation σ=3 Sample mean x¯=98.8

Q: Independent samples of size n₁ = 25 and n₂ = 36 are taken from two normal populations with known…

A: The given values are n1=25,n2=36,x¯1=13.6,x¯1=19.2 and σ1=5.5,σ2=4.2.

Q: Assume that a sample is used to estimate a population proportion p. To find the 99% confidence…

A:

Q: A 138.

A: Probability is the method used to obtain the chance of an event happening. It never takes negative…

Q: The scores on a test are normally distributed with an average (mean) of 72 and a standard  deviation…

A: As per our guidelines we are suppose to answer only three sub parts . Mean(μ)=72Standard…

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A:

Q: The length of human pregnancies is approximately normal with mean μ = 266 days and standard…

A: As per our guidelines we are suppose to answer only three sub parts . Mean(μ)=266Standard…

Q: The Fox TV network is considering replacing one of its prime-time crime investigation shows with a…

A: sample size(n)=450No.of viewers would watch the new show(x)=200

Q: Assume that the U.S. Mint manufactures dollar coins so that the standard deviation is 0.0410 g. The…

A: Level of significance  α=0.10 Claim: The sample is from a population with a standard deviation of…

Q: Assume that a recent survey suggests that about 88​% of computers use a new operating system.

A: The proportion is about 88​% of computers use a new operating system.

Q: Two samples are taken with the following sample means, standard deviations, and sample sizes. We…

A: given data, n1=50x¯1=20s1 =3n2=65x¯2=27s2 =2no reason to assume equal variance so use unequal…

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A: (a) The probability that 1 randomly selected adult male has a weight greater than 150 is obtained…

Q: Suppose you are comparing four groups in an ANOVA, and your result is significant. You want to…

A: αfw=0.05, k=4

Q: Alexandre Ricard 27:38 2. Jordan Guenette 28:07 3. Andrew Barrington 29:17 4. JoelDeschiffart…

A: Alexandre Ricard 27.38 Jordan Guenette 28.07 Andrew Barrington 29.17 Joel Deschiffart 29.45…

Q: situations, find the mean, variance, and standard deviation of the sampling distribution of the…

A: a) Sample size n =23 Population mean =17 Population standard deviation =4 b) Sample size n =94…

Q: Using your calculator, find the best-fit Line for the data (Stat -> Calc -> LinReg are the options…

A: It is given that the x is the explanatory variable and y is the response variable.

Q: Nursing Majors Non-Nursing Major 1294 1186 2480 Males 651 Females 839 Total 1490 Total 1945 2025…

A: Answer: From the given data,                                Nursing majors            Non Nursing…

Q: A sample of size n taken from a normal population with a known variance of o² = 9.7969 is used to…

A: From the given information, σ2=9.7969.

Q: State the appropriate conclusion for the hypothesis test. Use the p-value to indicate how…

A: A) P-value =0.045

Q: A recent study had shown that 28% of 18-34 year olds check their Facebook/Instagram feeds before…

A: It is given that n=150 and p=0.28.

Q: Nursing Majors Non-Nursing Major 651 1294 1186 2480 Males Females 839 Total 1490 Total 1945 2025…

A: From the given data,   Nursing Majors Non-Nursing Major  Total  Males 651 1294 1945 Females…

Q: A food safety guideline is that the mercury in fish should be below 1 part per million​ (ppm).…

A: Suppose µ is the mean amount of mercury in the population of tuna sushi.

Q: Consider the paired data: I 1.42 4.22 9.16 4.11 12.28 28.62 7.92 24.82 9.59 29.82 Find estimates for…

A: To find out the regression estimate, we need to perform Regression Analysis.  For this we will use…

Q: A newsgroup is interested in constructing a 90% confidence interval for the proportion of all…

A: Answer  Given  Confidence interval = 90% = 90/100 = 0.9 α= 1-0.90=0.10 α/2=0.05 Z-critical value:…

Q: Richard has been given a 6-question multiple-choice quiz in his history class. Each question has…

A: n=6, p=2/3 , X~Binomial(n=6, p=2/3)  Let X be the number of incorrect question. p be the probability…

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Q: Consider a population having a standard deviation equal to 9.96. We wish to estimate the mean of…

A: Given,Standard deviation(σ)=9.96  Margin of error(E)=1

Q: Karen wants to advertise how many chocolate chips are in each Big Chip cookie at her bakery. She…

A: The random sample of size, n=57 The sample mean, x=14.9 The sample standard deviation, s=2.1 The…

Q: Based on these sample results and significance level equal to 0.05, what is the sum of squares…

A: The given values are x¯1=62.1,x¯2=58.94,x¯3=71.2.

Q: Construct the scatter plot using your TI calculator and comment on the relationship (no need to show…

A: From the above question We are given that Let y be Ford’s market share at x years since 2015.…

Q: In a population of 20 families, the number of cars owned by each family is given below: 0, 2, 2, 3,…

A: The data for the number of cars owned by 20 families are given, where X is the number of cars owned…

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A: We have given that,  The data set are:- 22, 23, 26, 19, 5, 15, 10, 17, 12, 18

Q: A random sample of size n = 4 taken from a normal population with σ 2 = 9 is used to test H0 : µ =…

A: Sample size: n=4 Population variance: σ2=9 Null hypothesis: H0:μ=μ0 Alternative hypothesis: H1:μ=μ1…

Q: Giving a test to a group of students, the grades and gender are summarized below A B C Male 18 4 15…

A: A B C Male 18 4 15 Female 11 14 8

Q: Table 1.4. 95% Confidence Interval Odd Ratio For Gender and Depressed2: Odds Ratio for Gender…

A: The table for the 95% confidence interval odd ratio for gender and Depressed2.

Q: ↑ Listed in the accompanying data table are birth weights (g) from a sample of 26 births. When…

A: To apply the Wilcoxon rank-sum test, we first need to rank all the observations from smallest to…

Q: The probability of x≤3 successes is =

A: A binomial probability experiment is conducted with the given parameters p = 0.2 , so q = 1-p = 0.8…

Q: Lynn University wants to examine whether students display better academic performance in class…

A: In Class GPA Online GPA 4.0 4.0 3.5 2.2 3.7 3.3 3.5 3.7 2.0 2.5 3.2 3.8 3.3 3.8