A teacher wants to see if a new unit on factoring is helping students learn. She has five randomly selected students take a pre-test and a post test on the material. The scores are out of 20. Has there been improvement? (pre-post) What value of t would you use for the 90% confidence interval? answers: a) 3.747 b) 1.645 c) 4.604 d) 2.776 e) 2.132 student 1 2 3 4 5 pre test 12 14 11 12 13 post tes 15 17 15 20 13

Q: You are interested in finding a 95% confidence interval for the mean number of visits for physical…

A: Given,mean(x¯)=13.6standard deviation (s)=9.1918sample size(n)=10degrees of…

Q: You want to create a 95% confidence interval for a word problem.  For your 95% C.I., you need a…

A:

Q: You were interested to know how long do students of mathematics in the school spend studying their…

A: Given data is2,1.5,3,2,3.5,1,0.5,3,2,4sample size(n)=10

Q: Global Warming In April of 2014, a Gallup Poll of 1048 U.S. adults found that 25% of the respondents…

A: From the provided information, Sample size (n) = 1048 25% of the respondents were skeptical that…

Q: A psychologist is interested in constructing a 99% confidence interval for the proportion of people…

A: From the provided information, Sample size (n) = 739 From which 69 who were surveyed agreed with…

Q: Use the sample data and confidence level given below to complete parts  (c).   A research institute…

A: It is given that, the number of respondents said yes (x) is 587 and the sample size (n) is 912.  The…

Q: A dietician is conducting a study to see how many pieces of fruit or vegetables American Adults eat…

A: Given, n = 11 and data set is : 7 5 9 6 10 12 10 1 1 6 5 Calculating Mean and Standard…

Q: What z-value is associated with a 99% confidence interval? O a. -1.645 O b. 1.645 O C. 1.96 O d.…

A: We have given that Confidence level (c) = 99% = 0.99Significance level (α) = 1- 0.99 = 0.01

Q: 1. We are interested in determining if absences from a class affect your overall class grade. The…

A: Hey, since there are multiple subparts posted, we will answer first three subparts. If you want any…

Q: 405 (Round to three decimal places as needed.) b) Identify the value of the margin of error E. E=D…

A:

Q: tổ complete parts (a) through (d). A research institute poll asked respondents if they felt…

A: List of formula : a)  The best point estimate of the population proportion (p) is sample proportion…

Q: To estimate the proportion of smoker a sample of 100 men was selected. In the selected sample, 40…

A:

Q: Out of all the students that attend Yale University, 1,982 were selected to participate in a school…

A:

Q: A survey of 26 individuals found that they spent an average of $39.21 on exercise attire for the…

A: Confidence interval is an inference process which is used to estimate the population parameter. The…

Q: in finding a confidence interval for a random sample of 35 ​students' GPAs, one interval was (2.65,…

A: The mean of your estimate plus and minus the range of that estimate constitutes a confidence…

Q: Two researchers drew samples to estimate the same population. Here are the confidence intervals they…

A: a. The confidence interval A is, (0.52, 0.58).

Q: 5. Confidence interval: A psychologist is studying "learning" in rats and wants to determine the…

A: Part a: Calculate the 90% Confidence Interval  Calculate the Sample Mean  (xˉ)First, we add up all…

Q: The following information was recorded for test scores by men and women. Consider MU1 to be the…

A: From the above data  95% confidence level estimate of the difference in the means.      The correct…

Q: 1. A Statistics class decided to estimate the average weight (in ounces) of a bottle of water…

A: Given data, 15.91 16.08 16.08 25.94 16.02 15.94 15.96 16.03 15.82 25.96…

Q: ccording to the data, calculate a 90% confidence interval for the sample mean. What was the T Score…

A: Solution: n= 30 Sample size ∑xi=642 x=∑xin=64230=21.4 Sample mean s2=∑(xi-x)2n-1=56.52414 Sample…

Q: Construct the confidence interval for the population mean for the number of hours that students…

A: Given,saple size(n)=10sample mean(x)=13.5standar deviation(s)=8.6442degrees of…

Q: You are interested in finding a 90% confidence interval for the average commute that non-residential…

A:

Q: You suspect minority students are not as supportive of the new principal of a large school because…

A: Let us consider two samples taken randomly Here, the proportion of the two samples is determined.…

Q: You want to create a 99% confidence interval for a word problem.  For your 99% C.I., you need a…

A:

Q: A psychologist is interested in constructing a 99% confidence interval for the proportion of people…

A: From the provided information,Confidence level = 99%

Q: A psychologist is interested in constructing a 99% confidence interval for the proportion of people…

A: The formula for the confidence interval for the proportion is,

Q: You are interested in finding a 98% confidence interval for the average commute that non-residential…

A: Given27,27,9,26,9,26,19,18,17,25,24sample size(n)=11

Q: Suppose someone wanted an 75%-confidence interval. What value of z should they use? Choose the…

A: Level of significance ɑ=0.25

Q: Only about 14% of all people can wiggle their ears. Is this percent different for millionaires? Of…

A:

Q: If n=12, (x-bar)%=D34, and s-8, find the margin of error at a 98% confidence level Give your answer…

A:

Q: Construct the 90% confidence interval for the difference p1-p2 when x1=45, n1=85, x2=20, and n2=65.…

A: Given Information: x1=45n1=85x2=20n2=65c=90%=0.90

Q: medicine. In a recent survey, 2500 teenagers are asked whether or not they use that particular…

A:

Q: Construct the confidence interval for the population mean for the number of hours that students…

A: To calculate: The 97% confidence interval.

Q: 12% of all Americans suffer from sleep apnea. A researcher suspects that a different percentage of…

A: Note: Hey there! Thank you for the question. As you have posted multiple sub-parts, we have helped…

Q: ← The display provided from technology available below results from using data for a smartphone…

A: From the given technology results we have μ < 5  t = -0.288047  p = 0.387332  x = 4.78  Sx =…

Q: A study done by researchers at Alfred University concluded 70% of the 4380 student athletics who…

A:

Q: The school's newspaper reported that the proportion of students majoring in business is more than…

A: According to the given information in this question We need to identify the correct option

Q: A psychologist is interested in constructing a 99% confidence interval for the proportion of people…

A: From the provided information,Confidence level = 99%

Q: The t-value (t - score) that would be used to construct a 99% confidence interval given a sample…

A:

Q: need help with C

A: Let p be the population proportion of the people who wiggle their ears.Given that,Population…

Q: Your analysis of the raw data indicates that 16 of the 30 students reported driving no more than 20…

A: From the given information, let X be the number of students reported no more than 20 miles per day.…

Q: With 99% confidence the population mean commute for non-residential college students is between…

A: Given data : 18 20 20 24 5 28 10 13 5 24 11 11

Q: Use the sample data and confidence level given below to complete parts (a) through (d). A research…

A: Given; x=561n=935The level of significance is;α=1-0.95=0.05 (a) The best point estimate of the…