Let's shake on it: A random sample of 12-ounce milkshakes from 11 fast-food restaurants had the following number of calories. 504 613 Send data to Excel 476 580 Part: 0/3 Part 1 of 3 510 375 399 642 Assume the population standard deviation is o - 88. 608 473 700 Explain why it is necessary to check whether the population is approximately normal before constructing a confidence interval. It is necessary to check whether the population is approximately normal because (Choose one) X

Q: You measure 40 watermelons' weights, and find they have a mean weight of 76 ounces. Assume the…

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Q: A random sample of 64 business students required an average of 100 minutes to complete a statistics…

A: Given that, Mean = 100 Standard deviation = 20 Sample size = 64 95% confidence level

Q: You measure 20 backpacks' weights, and find they have a mean weight of 76 ounces. Assume the…

A: sample size (n)=20Mean ()=76standard deviation ()=9.6confidence level=99%

Q: The waiting times (in minutes) of a random sample of 22 people at a bank have a sample standard…

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Q: Suppose the mean height in inches of all 9th grade students at one high school is estimated. The…

A: For the given data Find Mean = ? margin of error at 99% confidence level = ? 99% confidence…

Q: population mean turtle weight. r answers as decimals, to two places ounces

A: Since population standard deviation is known, the critical value at 99% confidence value will be…

Q: 2) Sample mean can be used to make estimations of population mean. Considering the following…

A: We have given that Population Standard deviations (σ) = 11 Sample size (n) = 100 Sample mean (x̅) =…

Q: You measure 38 textbooks' weights, and find they have a mean weight of 34 population standard…

A: Given that,

Q: To find out how much fat is in a common hot dog, a nutritionist recorded the amount of fat in 100…

A: Given data is4,5,5.5,6,6.25,6.75,7,7.758,8sample size(n)=9

Q: T randomly selected 50 text books and found their mean cost to be $248.47 with a standard deviation…

A: Given information is :n=50x=$248.47S=$27.43And also given that 95% confidence interval is…

Q: I want to create a 95% confidence interval for the average price of coffee in West Virginia. I have…

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Q: Construct a confidence interval for the mean of the paired differences for the two populations with…

A: Solution: From the given information, n=32, d-bar=1.358, α=0.05 and sd=0.635.

Q: You measure 23 turtles' weights, and find they have a mean weight of 71 ounces. Assume the popula…

A: Given that  Sample size n =23 Sample mean =71 Population standard deviation =11.3

Q: 5. A researcher surveyed of 300 young adults ages 18-29 found that on average, those surveyed sent…

A: 5. Given that, n=300x¯=67.7s=23.6 Confidence level=90% Significance level=1-0.90-0.10…

Q: You measure 43 textbooks' weights, and find they have a mean weight of 49 ounces. Assume the…

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Q: You measure 25 turtles' weights, and find they have a mean weight of 45 ounces. Assume the…

A: The random variable turtle’s weight follows normal distribution. The sample size is 25. The sample…

Q: The data attached are the systolic blood pressure of 10 subjects collected before and after…

A: The systolic blood pressure of 10 subjects collected before and after exercise.

Q: You measure 41 watermelons' weights, and find they have a mean weight of 65 ounces. Assume the…

A: Introduction: The 100 (1 – α) % confidence interval for the population mean, μ, when the population…

Q: 15. A random sample of 100 visitors to a popular theme park spent an average of $142 on the trip…

A: SOLUTION: Given average x=142          standard deviation σ=47.5          random sample n=100

Q: Sales personnel for Skillings Distributors submit weekly reports listing the customer contacts made…

A: Given that, Sales personnel for Skillings Distributors submit weekly listing the customer contacts…

Q: Among various ethnic groups, the standard deviation of heights is known to be approximately three…

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Q: You measure 43 backpacks' weights, and find they have a mean weight of 72 ounces. Assume the…

A: We have given that, Sample mean (x̄) = 72, population standard deviation (σ) = 11.7 and sample size…

Q: Noise levels in a hospital were measured at 81 different locations. The average level was found to…

A: It is given that, Sample mean = 61.2 decibels. Sample standard deviation, s is 7.9 decibels. The…

Q: You measure 30 watermelons' weights, and find they have a mean weight of 34 ounces. Assume the…

A: Sample mean = x̅ = 34 Sample size = n = 30 Population S.D = σ = 11.3

Q: You measure 23 dogs' weights, and find they have a mean weight of 68 ounces. Assume the population…

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Q: Population variances o and o, are known. Question: Two kinds of thread are being compared for…

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Q: Construct a 95% confidence interval containing the population mean of the height of giraffes if a…

A: We want to find the 95% CI for population mean μ

Q: How much do wild mountain lions weigh? Six adult wild mountain lions are captured and released.…

A: Given data , 68, 104, 128, 122, 60, and 64.

Q: You measure 21 dogs' weights, and find they have a mean weight of 37 ounces. Assume the population…

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Q: You measure 48 backpacks' weights, and find they have a mean weight of 72 ounces. Assume the…

A:

Q: You measure 45 watermelons' weights, and find they have a mean weight of 56 ounces. Assume the…

A: The random variable weight follows normal distribution. The sample size is 45. The sample mean is…

Q: A sample of 24 heads of lettuce was selected. Assume that the population distribution of head weight…

A:

Q: A random sample of 64 business students required an average of 50.7 minutes to complete a statistics…

A: Margin of Error E = z(alpha/2) * s / sqrt(n)Lower Bound = X - z(alpha/2) * s / sqrt(n)Upper Bound =…

Q: You sample 36 students to find out how many hours they spent online last week. Your sample mean is…

A: Given data is appropriate for testing of hypothesis for single mean. Because it is a large sample…

Q: You measure 45 turtles' weights, and find they have a mean weight of 62 ounces. Assume the…

A:

Q: You measure 48 backpacks' weights, and find they have a mean weight of 71 ounces. Assume the…

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Q: Construct the indicated confidence interval for the difference between the two population means.…

A: Given:- The data describes the hours men and women had watched television during the previous week.…

Q: You measure 23 watermelons' weights, and find they have a mean weight of 70 ounces. Assume the…

A: Given Information: Sample mean ( x) = 70 Sample size (n) = 23 Population standard deviation (σ) =…

Q: A popular weight loss program claims users will lose weight each month. Linda samples 25 dieters and…

A: We have given that,  Sample mean (x̄) = 10 pounds, standard deviation (s) = 2 pounds and sample size…

Q: It is known that the population mean for the verbal section of the SAT is 500 with a standard…

A: From the provided information, Sample size (n) = 400 Sample mean (x̅) = 511 Population standard…

Q: You measure 25 textbooks' weights, and find they have a mean weight of 42 ounces. Assume the…

A: Given information: n=25x¯=42σ=5 Confidence level is 90% Significance level is 10%. From the z tale,…

Q: You may need to use the appropriate appendix table or technology to answer this question. Allegiant…

A: The standard normal distribution is has mean 0 and variance 1. It measure with the combined value of…

Q: Provide 90% and 95% confidence intervals for the population mean number of weekly customer contacts…

A: Given n=55 x¯=18.5s=5.2

Q: You measure 39 turtles' weights, and find they have a mean weight of 30 ounces. Assume the…

A: The mean is 30 and the population standard deviation is 7.8.

Q: A sample of twenty newborn elephants had a sample mean of 225 pounds and a sample standard deviation…

A: Here, the population standard deviation is given. Hence, it will be best to use a z- interval.