The confidence interval was (41%, 45%) What was the margin of error? +/- % What was the summary statistic? %

Q: A researcher found a 95% confidence interval for the proportion of college students who believe in…

A:

Q: describe how you would construct a 90% confidence interval to estimate the population mean age for…

A: Here, we need to discuss the steps involved in constructing the 90% confidence interval to estimate…

Q: A new fertilizer was applied to the soil of 196 bean plants. 90% showed increased growth. Find the…

A: From the provided information, Sample size (n) = 196 Sample proportion (p̂) = 0.90 Confidence level…

Q: Which value is greater than at most 75% of all scores in a data set?

A: The median is middle value of the observations, above or below which 50% of the observations lie.

Q: When you construct a 95% confidence interval, what are you 95% confident about?

A: Confidence intervals: Confidence intervals are the limits for the point estimate of population…

Q: How does the 90% confidence interval compare to the 95 % interval?

A: Given data : How does the 90% confidence interval compare to the 95 % interval?

Q: We surveyed 53 people in an attempt to determine the proportion of Americans who lease a vehicle. 13…

A: The proportion of sample Americans who lease a vehicle is, Thus, the proportion of sample Americans…

Q: A television station surveys 200 customers and finds that 23% of customers watch the evening news.…

A: Given data n=200 p=23% confidence level=99%

Q: additionally how would you find the: test statistic & p-value

A: The claim is that mean lead concentration is less than 19 μg/g Null hypothesis: H0 : µ=9 μg/g…

Q: find the z-number associated with a 92% level of confidence. find the z-number associated with a…

A:

Q: tc for a 0.99 confidence level when the sample is 9. (Round your answer to three decimal places.)

A:

Q: he confidence interval was (73, 83) What was the point estimate? What was the margin of error?

A: Given: Lower limit =73 Upper limit =83 The point estimate can be calculated as: Point estimate…

Q: Suppose you calculate a 99% confidence interval to be: 13.05 to 20.75. Determine the margin of error

A: Given data: The given upper limit is b=20.75. The given lower limit is a=13.05.   The expression for…

Q: The confidence interval was (36,45) What was the margin of error? What was the point estimate

A: Answer: From the given data, The confidence interval = (36,45)

Q: A new fertilizer was applied to the soil of 199 bean plants. 48% showed increased growth. Find the…

A: Margin of error for proportion is given by, MOE= z*√pq/n Where P Is proportion and Q= 1-P n is…

Q: Emma wants to estimate the percentage of people who use public transportation in a city. She surveys…

A: Obtain the margin of error. The margin of error is obtained below: The formula for the margin of…

Q: In a survey of 2094 adults in a recent year, 1356 say they have made a New Year's resolution.…

A: From the survey of 2094 adults in a recent year, 1356 say that they have made a new year's…

Q: A confidence interval was constructed to approximate a population proportion. the interval was from…

A: From the provided information, The confidence interval was from 30.5% to 41.5%.

Q: Use the confidence interval to find the margin of error and the sample mean.   (1.51,1.97)   Margin…

A: Given confidence interval is (1.51 , 1.97)

Q: Find  z for a  90% confidence level. Round your answer to two decimal places.

A: Given confidence level is 90% Significance level is 10%

Q: A new fertilizer was applied to the soil of 222 bean plants. 28% showed increased growth. Find the…

A:

Q: A survey showed that 20.2% of the children that participated in the survey like flavor O If the…

A:

Q: Education Television In a random sample of 200 people, 154 said that they watched educational…

A: Given that, X = 154 N = 200 90% confidence level

Q: State the equation for the 95% confidence interval?

A: The equation for confidence interval can be stated as: Here x̅ is the sample mean, Zα/2 is the…

Q: A student assistant administers an exam for the incoming grade 11 ABM students. Fifteen incoming…

A: We have to find test statistics.

Q: Several students were tested for reaction times (in thousandths of a second) using their right and…

A: From the given data: Right Hand Left Hand Difference 125 149 -24 115 144 -29 159 186 -27…

Q: What is the lower endpoint of a 95% confidence interval for the percent of students who like online…

A: Given Level of significance ɑ=0.05, x=92, n=134

Q: What are the z-scores for 90%, 95%, and 99% confidence?

A: the z-scores for 90%, 95%, and 99% confidence

Q: In the population, the mean SAT score is 1000. Would you be more likely (or equally likely) to get a…

A: Given that the population mean is 1,000 and the samples sizes selected are 10 and 30.

Q: What is the multiplier for an interval that estimates the proportion with  a. 88% confidence?  b.…

A: Confidence Interval: The form of the confidence interval is, CI = Point estimate ± Margin of error…

Q: find tc for a 95% confidence level when the sample size is 6.

A: level of significance, alpha = 0.05from standard normal table, two tailed t alpha/2 with n-1 = 6 d.f…

Q: Michelle, a student studying music, randomly sampled fellow music majors and asked whether they…

A: Given information- Confidence interval = (0.09, 0.26) We have to find margin of error. We know that-…

Q: Fatima bought a box containing 122 sweets of different colors, 19 of them in red. What is the 95%…

A: The Probability of red sweets is given by: P=19122=0.1557 The z-score for 95% confidence is given…

Q: Q.7 A company is evaluating an “herbal" drug to see if it changes the time it takes to overcome jet…

A: The endpoints of the confidence interval for μ1-μ2 are d±tα2.sdn The formula for the mean of the…

Q: A software company is interested in improving customer satisfaction rate from the 53% currently…

A: Statistical tests are used to calculate the test statistic and p-value. This test statistic and…

Q: A new fertilizer was applied to the soil of 276 bean plants. 24% showed increased growth. Find the…

A: Given,p^=0.24n=2761-p^=1-0.24=0.76α=1-0.95=0.05α2=0.025z0.025 =1.96

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

A: Given,sample size(n)=906no.of successes(x)=581sample…

Q: How do you find a 99 percent confidence interval?

A: Confidence intervals are a commonly used statistical tool for estimating the range of possible…