You are the manager of a local cinema, and want to investigate how much the average customer spends on the concession stand. You take a sample of 25 customers, and you find a sample average of $11.68, with a sample standard deviation of $2.45. Using this information, you want to create a 90% confidence interval for the population mean. What is the margin of error in your analysis? Note: 1- Do not round intermediate numbers. Round your final answer to three decimal places Your Answer: Answer

Q: a successful basketball player has a height of 6 feet 9 inches, or 206 cm. Based on statistics from…

A: Given,           Z -score=4.45           A basket ball player has a height of  6 feet 9…

Q: A population has mean 49 and standard deviation 5. What is the data value that has a z-score of 2?…

A:

Q: If you have 100 people in your sample, what would be the degrees of freedom you use to calculate the…

A: Given, n=100 Degree of freedom(df)=?

Q: ss, the scores on a test are normally distributed. The middle 68% of the scores fall between 74 and…

A: According to the empirical rule, approximately 68% of the observations fall within 1 standard…

Q: How do I answer this question? Noise levels at various area urban hospitals were measured in…

A: We have given that,  Sample size (n) = 84 Sample mean (x-bar) = 61.2 Sample standard deviation (s) =…

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: Noise levels at various area urban hospitals were measured in decibels. The mean of the noise levels…

A: Interval estimation is proposed as an estimate of the unknown parameter. Confidence interval is also…

Q: are in the 72nd percentile on an exam. The mean was 77 and the standard deviation was 7. What was…

A: From the given information we find the score.

Q: Suppose that you are interested in the earnings of GE employees. You have randomly sampled 225…

A: N=225,x¯=300,s=75,μ=288,α=0.01SX¯=sN=75225=5df=N−1=225−1=224

Q: You want to know the percentage of utility companies that earned revenue less than 39 million or…

A: Given data You want to know the percentage of utility companies that earned revenue less than…

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

A: Given that Mean = 83 And SD = 3.2

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: 3.) If you choose 25 companies, what is the probability that they a 0.5 percent? A.) 0.0162…

A:

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: You are applying for a job at two companies. Company A offers starting salaries with p= $30,000 and…

A: Given problem Given that   You are applying for a job at two companies. Company A offers starting…

Q: Jake needs to score in the top 10% of his class to earn a physical fitness certificate.  The class…

A: Solution: The class mean is μ= 78, and the standard deviation is σ= 5.5.

Q: What would a histogram look like if the mean is 50 the median is 50 and the standard deviation is…

A: Mean is 50.Median is 50.Standard deviation is 1.6.

Q: In this exercise, you will compare Chebyshev’s rule and the empirical rule. a. Compare the estimates…

A: a)The Chebyshev’s rule estimates at least 75% of observations lie within two standard deviations of…

Q: On a verbal skill test, the mean was 72 and the standard deviation was 7. If John scored 75, what…

A: Given data,Mean μ=72sd      σ=7If John scored 75z-score=?

Q: Provide a set of 20 data points that has a mean of 20, a median of 25, an IQR of 10, and a sample…

A: To create a data set with the given characteristics, here's the plan I would follow: Start by…

Q: Cherise is interested in how her friends compare to the population for number of hours of television…

A: The test statistic is,

Q: Determine the class average if the standard deviation was 8% and Henry’s mark of 85% is equivalent…

A: Given that,  The standard deviation =8%, Marks of Henry's =85%, and z-score =1.30.

Q: You perform a one-sample t test and calculate a t statistic of 3.0. The mean of your sample was 1.3…

A:

Q: In the Social Psychology course, you receive a score of 77 on the second exam. You are told that the…

A: Solution: Let X be the score. From the given information, X=77, σ=8 and z=–0.75.

Q: In an Algebra class, the scores on a test are normally distributed. The middle 68% of the scores…

A: The random variable score X is normally distributed and middle 68% of values fall between 71 and 83…

Q: Use the t-table or any statistical tool and report the t-score that you multiple by the standard…

A: Excel: The confidence level is 95%. Sample size is 5. Degrees of freedom is 5-1= 4. The t-score can…

Q: Tom scored a 115 on a measure of math ability and a 40 on a measure of verbal ability. The means and…

A: For mathabilitygiven,Mean(M)=95Standard deviation(S)=15Tom…

Q: A successful basketball player has a height of 6 feet 11 ​inches, or 211 cm. Based on statistics…

A:

Q: To celebrate the end of final exams you and friends head to a favorite downtown restaurant. You find…

A: Given data x=1.5 μ=2s=20 minutes=2060n=16

Q: You are interested in whether or not two different measures of child behaviour are different. The…

A: We have given that.   X~N( μ , ?^2 )   Z-score =( x - μ )/?   NOTE:- According to bartleby…

Q: A successful basketball player has a height of 6 feet 3 ​inches, or 191 cm. Based on statistics from…

A: Given,a basketball player has a height of 6 feet 3 inchesand the Z-score =2.31

Q: A successful basketball player has a height of 6 feet 4 ​inches, or 193 cm. Based on statistics from…

A:

Q: In an Algebra class, the scores on a test are normally distributed. The middle 68% of the scores…

A: Given : The middle 68% of the scores fall between 71 and 79 P(71<X<79)=68%