An algebra placement test was used to determine placement in mathematics courses. A sample of calculus students gave 50 scores. It is known want to be captured in a 96% confidence interval with length equal to 4, what is the minimum sample size? x=20500, *-821. Use the sample standard deviation as the population deviation. If

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

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

A: Given that,

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

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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: 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: 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: use this to find a 95% confidence interval for the mean height of all red maple trees

A: The sample size is n = 146 Sample mean = 59 And sample SD = 12 Since the sample size is large then…

Q: It is required to construct a (1−?)100% confidence interval for the true population median, M using…

A: A sign test is non-parametric. In case of a sign test, we compare the medians, M, instead of the…

Q: he average weight of 20 randomly selected cars was 3500 pounds. The sample standard deviation was…

A: given data, n=20df=n-1=20-1=19x¯=3500 pounds s=315 pounds CI=0.90α=1-0.90=0.10

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

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Q: A statistics professor is in the process of investigating how many classes university students miss…

A: The population standard deviation is 2.2.

Q: Construct a 90% Confidence Interval for the population mean u

A: Given that the sample size is n = 36 Sample mean = 106 Population SD = 12 At 90% confidence level,…

Q: You measure 30 watermelons' weights, and find they have a mean weight of 41 ounces. Assume the…

A: given data n = 30x¯ = 41σ = 9.599% ci for μ = ?

Q: ou measure 46 dogs' weights, and find they have a mean weight of 32 ounces. Assume the sample…

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

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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 clinical trial was conducted to test the effectiveness of a drug for treating insomnia in older…

A: Given,sample size(n)=19sample mean(x)=74.3standard deviation (s)=21.8degrees of…

Q: In a survey, 24 people were asked how much they spent on their child's birthday party. The results…

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

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: A study of 64 bolts of carpet showed that their average length was 75 yards. The standard deviation…

A:

Q: A runner wants to know her average mile running time. She records a sample of 25 running times. The…

A: Solution: Let X be the mile running time. From the given information, x-bar=6.5 minutes, s=0.7…

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

A:

Q: A student read that a 95% confidence interval for the mean age an American first drinks alcohol is…

A: Lower limit = 16 - 1.2 =14.8 Lower limit = 16 + 1.2 =17.2

Q: You measure 29 backpacks' weights, and find they have a mean weight of 46 ounces. Assume the…

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Q: A pollster asked a random sample of 269 students about their savings. The average amount of money…

A: The sample size is 269, sample mean is $258, and sample standard deviation is $145. The degrees of…

Q: We have developed a series of questions to measure job satisfaction of bus drivers in London,…

A:

Q: please give me answer step by step

A: Step 1: Suppose µ is the population mean commute time of all TCC students. The sample size, sample…

Q: You measure 44 dogs' weights, and find they have a mean weight of 80 ounces. Assume the population…

A: You measure 44 dogs' weights, and find they have a mean weight of 80 ounces. Assume the population…

Q: You measure 30 backpacks' weights, and find they have a mean weight of 78 ounces. Assume the…

A:

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

A:

Q: The scores in an intelligent test (IQ test) are known to be normally distributed with a  mean of 100…

A: Let X be the score of an IQ test.Given that, X is known to be normally distributed with a mean of…

Q: 26 randomly selected students took the calculas final. If the sample mean was 90. Construct a 95$…

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Q: Do female college students spend more time than male college students watching TV? This was one of…

A: Let μMales be the mean time spent watching TV per day by males and μFemales be the mean time spent…

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 sociologist develops a test to measure attitudes about public transportation, and 27 randomly…

A: Given,sample size(n)=27sample mean(x¯)=76.2standard deviation(s)=21.4degrees of…

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…