For a group of 45 students taking a PSDTF test, the mean heart rate was 96 beats per minute, and the standard deviation was 5. Find the 95% confidence interval of the true mean

Q: Find the value of ta for a 99% confidence interval when sample size is 30

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

Q: what would be the 90% confidence interval of the true proportion of young adults who have received…

A: Given that sample size is n = 190 And the sample proportion is 70% = 0.7 At 90% confidence level,…

Q: Find the 95% confidence interval for the mean difference of the tests, and explain it.

A: Test - 1 (X) Test-2 (Y) (x-xbar) (x-xbar)^2 (y-ybar) (y-ybar)^2 1.2 1.4 -0.31111 0.09679 -0.24444…

Q: Determine the margin of error for the confidence interval for the proportion: 0.509<p<0.845 The…

A: The given confidence interval is about population mean. We have to find the margin of error. Margin…

Q: Find a 90% confidence interval for the population mean, if the sample size is 58, the sample mean is…

A:

Q: confidence interval for the proportion of college students who have texted during class was found to…

A: Given

Q: If a school district takes a random sample of 53 Math SAT scores and finds that the average is 488,…

A: Given Information: Sample size n=53 Sample mean x¯=488 Population standard deviation σ=100

Q: Find the margin of error for the given confidence level.

A: Margin of error :  In a confidence interval, the range of values above and below the sample…

Q: What is the t-value for a 95% confidence interval given that the sample size is 16? Write the exact…

A: Given: confidence level =95%  Sample size n=16  Then degree of freedom for t-test is =n-1  To find…

Q: Which of the following sample sizes, all other things being equal, will produce the most precise…

A: Considering we are being provided sample mean and sample standard deviation (in option 5) we can…

Q: music fans yields this 95% confidence interval estimate of the proportion of fans who love the music…

A: The sample proportion can be calculated as: Sample Proportion=LowerLimit+UpperLimit2 Thus, Sample…

Q: Suppose that you will be taking a random sample from a population and that you intend to find a 95%…

A: Solution: The confidence interval for the population mean is calculated by using the following…

Q: In a sample of 300 people, 154 said that they watched news on television. Find the 90% confidence…

A: According to the given information in this question We need to find the 90% confidence interval of…

Q: Thirty randomly selected students took the calculus final. If the sample mean was 74.2 and the…

A: From the provided information, Sample size (n) = 30 Sample mean (x̅) = 74.2 Standard deviation (s) =…

Q: kendall wants to estimate the percentage of vegetarians who are also vegan. She surveys 150…

A: The margin of error for the 95% confidence interval of population proportion is given as follows :…

Q: The confidence interval was (22, 26) What was the point estimate? What was the margin of error?

A: Given confidence interval was (22, 26)

Q: Suppose you survey a random sample from a large population to understand the population proportion.…

A: Given information- Margin of error, E = 6% = 0.06 Confidence level, c = 98% Since nothing is known…

Q: A researcher constructed a 95 percent confidence interval for the mean number of alfalfa weevils on…

A: The 95% confidence interval for the population mean is (1.50, 3.50)

Q: What proportion of college students earn their undergraduate degrees in four years? A college…

A: The formula of the margin of error when the limits given are,

Q: As the sample standard deviation increases when all other parts of the confidence interval stay the…

A: We want tell the sample standard deviation increases when all other parts of the confidence interval…

Q: Suppose you calculate a 95% confidence interval for a proportion to to be: 0.39 to 0.78. Determine…

A: Given,   Lower bound = 0.39​ Upper bound = 0.78   Here, we use to determine the margin of error.

Q: Suppose that you have obtained data by taking a random sample from a population and that you intend…

A: 95% percent confidence interval will give more accurate estimate of µ than 99% confidence interval.…

Q: An investigator computes a 95% confidence interval for a population mean on the basis of a sample of…

A: To find half of width, We need to calculate 4 times the sample Size.

Q: In a random sample of 80 teenagers, the average number of texts handled in a day is 50. The 96%…

A: Given information: n = 80 μ=50 96% confidence interval for the mean number of texts handled by teens…

Q: Suppose you constructed a 90% confidence interval for the true average GPA of California community…

A: Solution: 1. From the given information, 90% and 80% confidence interval for the true average GPA of…

Q: Assume that you took a sample and calculated the sample mean as 100.you then calculated the lower…

A:

Q: If a school district takes a random sample of 61 Math SAT scores and finds that the average is 425,…

A:

Q: If you construct a 90% confidence interval of the mean amount of money a student receives just from…

A: Given 90% confidence interval of the mean amount of money a student receives just from financial aid…

Q: Is 12 minutes the margin of error for this 95% confidence interval v [Select ]

A: The 95% confidence interval for the average arrival time before departure for all air travellers is…

Q: Suppose we know that a confidence interval for a population proportion is (0.572, 0.662), with a…

A:

Q: A survey of 97 random homeowners in my neighborhood had a mean of $720 spent on lawn care. Construct…

A:

Q: In the previous example, you learned that the 95% confidence interval for the true proportion of all…

A: Calculate the point estimate and margin of error used to create this confidence interval.

Q: Suppose an economist wishes to estimate the mean commute time of workers in Westchester County. The…

A: Given, Sample size n = 31Sample mean x¯ = 31.2Sample standard deviation s = 12.1

Q: A 90% confidence interval for the proportion of Americans with cancer was found to be (0.185,…

A:

Q: Find a 90% confidence interval for the true proportion of people that eat frog legs, if in a sample…

A: Given, n = 732 p = 0.65 1 - α = 0.90α = 0.1α2 = 0.05   To find, 90% confidence interval for the true…

Q: A poll commissioned by the Center on Addiction and Substance Abuse at Columbia University found that…

A: Given that, X = 1340 N = 2000 98% confidence level

Q: If a school district takes a random sample of 56 Math SAT scores and finds that the average is 488,…

A: Given information Sample size(n) = 56 Sample mean = 488 Population standard deviation (σ) = 100

Q: It is known that the population range equals 60. With a 95% confidence level, the sample size that…

A:

Q: Find the confidence level and α for an 80​% confidence interval.

A: Given confidence level =80%

Q: For the same sample statistics, which level of confidence would produce the widest confidence…

A:

Q: a laboratory tested twelve chicken eggs and found that the mean amount of cholesterol was 240…

A: Sample mean = x̅ = 240 Sample size = n = 12 Sample S.D = s = 16.5

Q: For a 95% confidence interval and n=21 give the Chi-squared right value.

A: From the provided information, Sample size (n) = 21 Confidence level = 95% The level of significance…

Q: At one large college, 660 out of the 1500 students surveyed said they plan to take another science…

A: Given that,   x=660,n=1500 The sample proportion is, Critical values: By using the standard normal…

Q: What is the t-value for a 90% confidence interval given that the sample size is 26? Write the exact…

A:

Q: Suppose we know that a confidence interval for a population proportion is (0.105,0.355), with a…

A: Obtain the margin of error. The margin of error is obtained below: Margin of Error: The margin of…

Q: Given below are the sodium contents in milligrams for seven brands of hot dogs rated as “very good”…

A:

Q: A recent survey of 1,000 people found that 90% of Americans support background checks for purchasing…

A:

Q: f a Random Sample of 450 adults includes 155 who identify as happy, compute an 80% confidence…

A: Given data,n=450x=155sample proportion p=xn=155450=0.34z-value at 80% confidence is Zc=1.282

Q: It was found that in a sample of 90 teenage boys, 70% of them have received speeding tickets. What…

A: Given data ,n=90P=70%=0.7The z-value at 90% confidence is1.645=z∝12=1.645

Q: Flagstaff found 470 NAU students who drink coffee daily. Find a 95% confidence interval for the true…

A: Given