If n=41, ¯x=39, and s=16, construct a confidence interval at a 99% confidence level. Assume the data came from a normally distributed population

Q: Out of a sample of 600 adults aged 18 to 30, 162 still lived with their parents. Based on this,…

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Q: Of 363 randomly selected medical students, 20 said that they planned to work in a rural community.…

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Q: If n- 22, - 44, and s 12, construct a confidence interval at a 95% confidence level. Assume the data…

A: Solution We solve it by using excel

Q: Calculate the 95% and 99% population proportion confidence intervals for this finding.

A: Answer: Given that  the random sample of 100 people  n=100  r=74 The test statistics for population…

Q: A Dean of a certain business school is interested in the difference in proportions of A's given by…

A: Givenn1=800x1=240n2=800x2=160p1^=x1n1=240800=0.3p2^=x2n2=160800=0.2α=1-0.95=0.05α2=0.025zα2=1.96

Q: From a simple random sample of 400 of the 1,395 colleges in our population, it was found that…

A: Given : 1395 colleges in our population  Population Size (N) = 1395 400 colleges selected randomly…

Q: Lindsey selected a random sample of 25 tomatoes at the farmer's market. The 95% confidence interval…

A: When Lindsey selected a random sample of 25 tomatoes at the farmer's market, she was aiming to…

Q: A sample of 200 found that 43.2% of those sampled consumed more than 2 alcoholic  beverages  a week.…

A: Given:

Q: Suppose that the a college wants to have an idea of the average SAT score of the incoming freshman…

A: The confidence level is 0.90, the standard deviation is 310 and margin of error E is 50.

Q: sample of 97 psychology graduates found an average salary of $71 K/year. Assume ?=$14 K/year. Find…

A: Given Z score 90% confidence interval=1.645 Sigma=14 n=97

Q: n a survey of 2000 American adults age 60 and over, 1320 received a flu shot. Construct a 90%…

A: Given , n =2000 X=1320 P=x/mn =1320/2000  =0.66 E-value at 90% coincidence is 7c=1.645

Q: Out of sample of 500 people, 25% exercise daily. What is the confidence interval for the population…

A: Given Information:    n=500  p=0.25 q=1-p=1-0.25=0.75α=0.05

Q: A poll of 827 students at Alpha state college found that 61% of those polled preferred a quarter…

A: It is given that the proportion of the students who preferred a quarter system to a trimester…

Q: If n=41n=41, ¯xx¯=36, and s=9s=9, find the margin of error for a 80% confidence level.

A: Answer - Given, Sample size n = 41,    x  = 36    and s = 9               80% confidence interval…

Q: A researcher wanted to check whether the percentage of Canadian adults with obesity has decreased in…

A: Number of Canadian adults in 2005= 75 Number of Canadian adults in 2009 = 120   significance level =…

Q: A researcher is interested in a 95% confidence interval. It is found to have a point estimate of 2.5…

A: From the provided information, Confidence level = 95% Point estimate = 2.5 Margin of error (E) = 0.6

Q: Of 118 randomly selected​ adults, 34 were found to have high blood pressure. Construct a​ 95%…

A: Here, x =34 and n = 118.

Q: Find the critical value zc that corresponds to a 98% confidence level

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Q: A sample of 15 found that 43.2% of those sampled consumed more than 2 alcoholic  beverages  a week.…

A:

Q: If n=17, (x-bar)-45, and o =12, construct a confidence interval at a 80% confidence level. Assume…

A: Given X-bar=45 S=12 n=17

Q: he lower end of the 95% confidence interval is Question Blank 1 of 2and the higher end of the 95%…

A: n=8 Sample sizex= 9.8 Sample mean s= 0.4 Sample standard deviation

Q: one with a 95% confidence level and the other with a 99.7% confidence level. Which interval is…

A: Confidence interval is probability, which refers that population parameter will fall within set of…

Q: A poll conducted randomly in 2014 found that 52% of U.S. adult Twitter users get at least some news…

A: Proportion is 0.52. The standard error 0.024 The absolute value of Zα/2 is 2.5758 using the Excel…

Q: A health insurance firm wants to estimate the proportion of a population that would receive the flu…

A:

Q: In a random sample of 500 Americans, 50% indicated that they have a cat for a pet. Estimate with 95%…

A: Given information

Q: The career center at a large university surveyed a random sample of students who graduated the…

A: First, we need to calculate the proportions of engineering and business majors who were able to find…

Q: A random sample of high school students is used to estimate the mean time all high school students…

A: Solution: From the given information, a 99% confidence interval is 1.7 hours to 3.1 hours.

Q: Suppose that a 95% confidence interval for a population p = the population proportion of men who…

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Q: In a clinical trial of a certain drug, 30 subjects experience headaches among the 220 subjects…

A: Step 1: State the given: number of favorable cases, x = 30sample size, n = 220confidence level =…

Q: в, — 42, s — 8.8, SS,, — 64, п — 19 90% : < B1< 99% : < B1 S

A: Given   beta cap1 =42, s=8.8, SS xx =64 , n = 19

Q: In a random sample of 145 students, we find that 53% have attended a baseball game at some point in…

A: Given,sample size (n)=145sample proportion(p^)=0.53α=1-0.95=0.05α2 =0.025z0.025 =1.96

Q: Out of 100 people sampled, 44 have lied to a family member in the past month. Based on this,…

A:

Q: The police department wants to reduce the margin of error for their 95% confidence interval. If they…

A: Here Given  The police department wants to reduce the margin of error for their 95% confidence…

Q: Find the critical value zc that corresponds to an 80% confidence level.

A: Given : α=1-0.80=0.20We want to find,Critical value,Zc=?

Q: In a sample of 900 people, 378 say they snooze the alarm more than once in the morning. Find a 95%…

A: Given,   The sample proportion is,

Q: Find a 99% confidence interval for the mean of weights of Siamese cats if the population standard…

A: We have given that Sample mean (x̄) = 11.8, population standard deviation (σ) = 2.1 and sample size…

Q: Of 102 randomly selected adults, 42 were found to have high blood pressure. A 90% confidence…

A:

Q: Come up with  your own data for a problem that would ask for a 90% confidence interval utilizing Z.…

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Q: A simple random sample of 1000 people age 18 or over is taken in a large town. It turns out that 189…

A: The objective of this question is to calculate a 95% confidence interval for the percentage of…

Q: A researcher is attempting to calculate a 95% confidence interval for the mean average wingspan of…

A: The random variable wingspan follows normal distribution. We have to find the 95% confidence…

Q: In a random sample of 250 students who enrolled in Science, 150 took notes during classes. Find an…

A: Given that n=250,x =150,alpha =0.05 Find an approximate 95% confidence interval for the population…

Q: Take an SRS where n equals 50 and calculate at 95% confidence interval. If we took a different SRS…

A: Sample size Confidence level is 95%If we took a different SRS of the same size (50) from the same…