Karen wants to advertise how many chocolate chips are in each Big Chip cookie at her bakery. She randomly selects a sample of 78 cookies and finds that the number of chocolate chips per cookie in the sample has a mean of 19.3 and a standard deviation of 2.1.   Find a 80% confidence interval for the number of chocolate chips per cookie for Big Chip cookies?   Round your answers to one decimal place.

Q: The quality-control manager at a light bulb factory needs to determine whether the mean life of a…

A: Given,sample size(n)=64sample mean(x¯)=350Population standard deviation(σ)=100

Q: Suppose that the exam scores of a statistics class were normally distributed with a mean of 94 and…

A: Solution: Let X be the exam score of a statistics class. From the given information, X follows…

Q: A psychology exam has 300 questions with each question worth 1 point. Assume that the distribution…

A: It is given that mean score is μ=165 and Standard deviation is σ=30 for a normal distribution of…

Q: A successful basketball player height is 203 cm. His converts to the z score of 4.10. How many…

A: Consider, X = 203  z-score = 4.10 z-score is a numerical value that tells the number of standard…

Q: A researcher measures the amount of food consumed by each dog in her lab. She finds that the mean…

A: It is given that mean amount of food is 12 oz and number of dogs is 16. The sum of squared…

Q: The mean and standard deviation of players' heights for the 2003 NBA season were H 79.5 inches and o…

A: A z-score (also called a normal score) gives an indication of how far from the mean a data point is.

Q: Use z scores to compare the given values. The tallest living man at one time had a height of 254 cm.…

A:

Q: Greg is in his first semester at a university and is taking a calculus course with a large…

A:

Q: Use z scores to compare the given values. The tallest living man at one time had a height of 242 cm.…

A: Thus, the standard z-score for the tallest man is 10.51.

Q: A successful basketball player has a height of 6 feet 8 ​inches, or 203 cm. Based on statistics from…

A: Consider X is a random variable defined as the height of a successful basketball player.The provided…

Q: In a given school year, the ACT test mean score was 21 with a standard deviation of 4.9.  The same…

A:

Q: ng man

A: Given that Tallest living man height (X1) = 238 Mean Heightμ=176.25 Standard deviationσ = 6.32 Z…

Q: Angela polled her first grade class about their family pets. The following data lists the number of…

A:

Q: A Population has a Mean of 90 and a standard deviation of 25.  A sample of 20 college students is…

A:

Q: Nationally, patients who go to the emergency room wait an average of 7 hours to be admitted into the…

A: From the provided information, Sample size (n) = 10 Sample mean (x̅) = 6.9 Sample standard deviation…

Q: Mr. Green examines the Unit 1 Biology test scores in his class. The test scores are normally…

A: Normal distribution is a continuous distribution which has many real life applications. Normal curve…

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: Laura learned that the average GPA in her school is 3.6 with a standard deviation of 0.3. If her GPA…

A: From the given information,   Mean = 3.6 Standard deviation = 0.3   The objective is to find the…

Q: John got 83 on a test, with a standard deviation of 10.73 and the class mean was 77.1. Paul got 88…

A: From the provided information, John got (X) 83 on a test with a standard deviation (σ) of 10.73 and…

Q: Decide if the following statement is true or false. Explain why. It is possible to have a standard…

A: We need to decide if the given statement that " It is possible to have a standard deviation of -2…

Q: Use z scores to compare the given values. The tallest living man at one time had a height of 247 cm.…

A: Given information- Population mean, µ = 177.86 cm Population standard deviation, σ = 6.69 cm Height…

Q: The average and standard deviation for ACT scores are 20 and 3 respectively. average and standard…

A:

Q: SAT scores have a mean of 1026 and a standard deviation of 209. ACT scores have a mean of 20.8 and a…

A: The SAT scores, mean, and standard deviation are:The ACT scores, mean, and standard deviation are:

Q: Three potential employees took an aptitude test. Each person took a different version of the test.…

A: given data  norma x1 = 84.5   μ1 = 67.5    σ1 = 10rebecca x2 = 306.5   μ2 = 293    σ2 = 27morgan x3…

Q: You have collected a simple random sample of 39 students. On average (the average here is measured…

A: In this case, the minimum amount spent on books is $398 and maximum amount is $804.

Q: What raw score does he need to get the certificate

A: Given that Mean = 83 And SD = 3.2

Q: A teacher wishes to give A’s to the top 8% of the students and F’s to the bottom 8%. The next 10%…

A: Here we need to find the mean, median and mode for the given normal distribution. Also we need to…

Q: Use z scores to compare the given values. The tallest living man at one time had a height of 234…

A:

Q: Three potential employees took an aptitude test. Each person took a different version of the test.…

A: The raw score of Cade is 95.5. For Cade's version of the test, the mean, μ=64.7, and the standard…

Q: Nick takes a Organic Chemistry test and scores a 40. The Chemistry test scores were normally…

A: Given The data is as follows: Nick's organic chemistry score, X=40 μ=50σ=4   Sally's physics…

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

A: Given information:

Q: In an  administration to 2000 student the average score is 65 and the standard deviation is 25.…

A: Given in an administration to 2000 student the average score is 65 and the standard deviation is 25.…

Q: The golf scores for a school team were normally distributed with a mean of 68 and a standard…

A: Let X be the golf scores. It is given that X is normally distributed with mean 68 and standard…

Q: ... Since the z score for the tallest man is z = and the z score for the shortest man is z = | , the…

A: The tallest living man at one time had a height of 238 cm. The shortest living man at that time had…

Q: A population has mean 27 and standard deviation 12 . What is the data value that has a z-score of -2…

A: Given data, Mean=27 sd=12 z=-2 x=?

Q: Use z scores to compare the given values. The tallest living man at one time had a height of 245 cm.…

A: Determine the Z-score for the tallest man. The Z-score for the tallest man is obtained below as…

Q: In a normally distributed data set of how long customers stay in your store, the mean is 43.5…

A: Given data Mean μ = 43.5 Standard deviation σ = 3.9 95% of your customers to stay in your store.…

Q: Use z scores to compare the given values.   The tallest living man at one time had a height of 225…

A: Given that  The tallest living man at one time had a height of 225 cm. The shortest living man at…

Q: Use z scores to compare the given values. The tallest living man at one time had a height of 263 cm.…

A:

Q: Abby's score of 704 on the math portion of the 2002 GRE exam placed her in the 84th percentile rank.…

A: given data  Abby score x = 704 84th percentile σ = 141μ = ?