A botanist wishes to estimate the typical number of seeds for a certain fruit. She samples 61 specimens and counts the number of seeds in each. Use her sample results (mean = 37.4, standard deviation = 12.6) to find the 95% confidence interval for the number of seeds for the species. Enter your answer as an open-interval accurate to 2 decimal places.  For instance, (12.45, 91.23) 95% C.I. =

Q: The mean height for the population of a species of gorilla is believed to be 70 inches, and the…

A: Sample size n =20 Sample mean=73 Population standard deviation =4 NOTE:- According to bartleby…

Q: Use z scores to compare the given values. In a recent awards ceremony, the age of the winner for…

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Q: Use the sample mean(78.5)and sample standard deviation (12.3671)in your calculations below. Use…

A: Given that:

Q: In a Statistics examination, the mean score is 82 and the standard deviation is 3.5. If the teacher…

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Q: Using the formulas, calculate the (i) mean and (ii) standard deviation of X.

A: Let p be the probability of shot that scored points. Given that p = 61.3% = 0.613 Given that X= the…

Q: The average cost to attend a particular university is 63,551. Assume the population standard…

A: Approach to solving the question:So, with a sample size of 60 students, we can be 95% confident that…

Q: In a random sample of nine people, the mean driving distance to work was 25 miles the sample…

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Q: A recent study investigated tractor skidding distances along a road in a forest. The skidding…

A: In the given case the null hypothesis is claiming the mean value to be more than or equal to 425.

Q: How many adults must be randomly selected to estimate the mean FICO (credit rating) score of working…

A: By using the provided information, We have 95% confidence level Margin of error = 4 Population…

Q: Nationally, patients who go to the emergency room wait an average of 4 hours to be admitted into the…

A: From the provided information, Sample size (n) = 11 Sample mean (x̅) = 2.7 Standard deviation (s) =…

Q: Beth randomly chose 30 school days and timed her drive to school on those days. Ana randomly chose…

A: Given that  We have to test hypothesis for the claim that Beth’s drive time is greater than…

Q: A statistics professor announces that 15% of the grades he gives are As. The results of the final…

A: It is given that the mean and standard deviation are 83 and 6, respectively.

Q: Assume that adults have IQ scores that are normally distributed with a mean of 104.6 and a standard…

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Q: The population average GPA for fall students is 3.00. You think the average GPA for Psychology…

A: The test statistic for single mean is, t=x¯-μ0snwherex¯=sample means=sample standard…

Q: The weights of grizzly bears in Jellystone National Park are normally distributed, with a mean of 68…

A:

Q: During rush hour, the traffic speed on a busy highway is found to have mean 42 mph and standard…

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Q: George got a 75 on a math test. The reliability of the math test was .85 and the standard deviation…

A: Confidence Interval: A confidence interval, refers to the probability that a population parameter…

Q: This year’s group of high school students did poorly on their final exams (M = 69, s = 11.3),…

A: Given information- We have given the mean and standard deviation of the high school students final…

Q: Assume that the heights of women are normally distributed with a mean of 65.4 inches and a standard…

A: We have given that  Mean=μ=65.4 Standard deviation=σ=2.7 X~Normal(μ=65.4,σ=2.7)

Q: ness of a blood-pressure drug is being investigated. An experimenter finds that, on average, the…

A: As the population standard deviation is not known, we will use t distribution. Df = n-1=697-1=696…

Q: Your instructor wishes to estimate the mean amount of time students spend studying math each…

A: Given that  Margin of error =E =2 Population standard deviation =12.7 95% confidence.

Q: A test has a mean score of 55 with a standard deviation of 12. Using the Empirical Rule determine…

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Q: Assume that adults have IQ scores that are normally distributed with a mean of 95.6 and a standard…

A: Given: x~N(μ,σ)μ=95.6σ=24.3

Q: A researcher named liza wants to estimate the mean age of pilots in an airline company. The…

A: Given: σ=6.30Length of the interval=3.2

Q: for a sample of 150 that has a mean of 6540 and a standard deviation of .89, calculate the 95%…

A: It is given that mean and standard deviation are 6,540 and 0.89, respectively.

Q: Given a scenario where n=100 and p=0.8, find the standard deviation.

A: In this case the sample size is n = 100 and p = 0.8.

Q: Compute for the sample size if the margin of error is 15, with a sample standard deviation of 55 and…

A: We have given that the margin of error is 15, with a sample standard deviation of 55 and a 95% level…

Q: The standard deviation on a final examination was 9, while the mean grade was 72. The best 14% of…

A: GivenMean(μ)=72standard deviation(σ)=9

Q: What is the test statistic for this procedure?

A: Assume that all conditions are met. The mean of the differences was 1.33 and the standard deviation…

Q: You would like to estimate the variance and standard deviation for credit scores based on FICO.…

A: Construct the 95% confidence interval estimate for the variance of credit scores Obtain the critical…

Q: and a standard deviation of 1.00°C. A single thermometer is randomly selected and tested.…

A: Given: Assumption:  The readings at freezing on a bundle of thermometers are normally distributed…

Q: The use of chemicals is considered to increase the resistance to scratches during a painting…

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Q: Use z scores to compare the given values

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Q: me that the heights of women are normally distributed with a mean of 62.9 inches and a standard…

A: To calculate the 75th percentile of a normal distribution, we used the formula as: X=μ+Zσ Where 'X'…

Q: Compute a confidence interval (95% interval, 2-tailed) for a mean. Data: sample mean = 38.5; sample…

A: Given, x¯=38.5s=8n=22α=0.05

Q: manager of a major retail store has taken a random sample of 25 customers. The average sale was…

A: From the given information we conduct t test for one mean.

Q: A company produces steel rods. The lengths of the steel rods are normally distributed with a mean of…

A: It is given that the mean is 241.2 and the standard deviation is 0.6.