The table below contains the amount that a sample of nine customers spent for lunch ($)...

The table below contains the amount that a sample of nine customers spent for lunch ($) at a fast-food restaurant: 4.88 5.01 5.79 6.35 7.39 7.68 8.23 8.71 9.88 a.Compute the sample mean and sample standard deviation of the amount spent for lunch. b.Construct a 99% confidence interval estimate for the population mean amount spent for lunch ($) at the fast-food restaurant, assuming the population is normally distributed. c.Interpret the interval constructed in (b).

Better to use the computer text display, because the handwriting is hard to see. plz

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orchestra answered 2 years ago

The table below contains the amount that a sample of nine customers spent for lunch ($)...

The table below contains the amount that a sample of nine customers spent for lunch ($) at a fast-food restaurant: 4.88 5.01 5.79 6.35 7.39 7.68 8.23 8.71 9.88 a. Compute the sample mean and sample standard deviation of the amount spent for lunch. b. Construct a 99% confidence interval estimate for the population mean amount spent for lunch ($) at the fast-food restaurant, assuming the population is normally distributed. c. Interpret the interval constructed in (b).

2. The table below contains the amount that a sample of nine customers spent for lunch...

2. The table below contains the amount that a sample of nine customers spent for lunch ($) at a fast-food restaurant. Complete parts a and b below. 4.26 5.23 5.67 6.28 7.44 7.51 8.25 8.69 9.61 Construct a 99% confidence interval estimate for the population mean amount spent for lunch at a fast-food restaurant, assuming normal distribution. The % confidence interval estimate is from $____________to $___________ 3. he table below contains a certain social media company's penetration values (the percentage...

The data table below contains the amounts that a sample of nine customers spent for lunch...

The data table below contains the amounts that a sample of nine customers spent for lunch (in dollars) at a fast-food restaurant 4.23 5.08 5.96 6.45 7.43 7.54 8.36 8.51 9.76 a) At the 0.05level of significance, is there evidence that the mean amount spent for lunch is different from $6.50? b) Calculate test stastics ( four decimals places) C) Calculate P value and explain interpretations ( four decimal places)? d) Because the sample size is 9, do you need...

4. Below is the amount that a sample of 15 customers spent for lunch ($) at...

4. Below is the amount that a sample of 15 customers spent for lunch ($) at a fast-food restaurant: 7.42 6.29 5.83 6.50 8.34 9.51 7.10 5.90 4.89 6.50 5.52 7.90 8.30 9.60 6.80 Recall the lunch at a fast-food restaurant problem from Assignment 4. Let µ represent the population mean amount spent for lunch ($) at a fast-food restaurant. Previously you calculated the mean and standard deviation of the fifteen sample measurements to be x ̅ = $7.09 and...

The file FastFood contains the amount that a sample of fif- teen customers spent for lunch...

The file FastFood contains the amount that a sample of fif- teen customers spent for lunch ($) at a fast-food restaurant: 7.42 6.29 5.83 6.50 8.34 9.51 7.10 6.80 5.90 4.89 6.50 5.52 7.90 8.30 9.60 At the 0.05 level of significance, is there evidence that the mean amount spent for lunch is different from $6.50? Determine the p-value in (a) and interpret its meaning. What assumption must you make about the population distribu- tion in order to conduct the...

The data below represents the amount that a sample of fifteen customers spent for lunch ($)...

The data below represents the amount that a sample of fifteen customers spent for lunch ($) at a fast-food restaurant: 8.42 6.29 6.83 6.50 8.34 9.51 7.10 6.80 5.90 4.89 6.50 5.52 7.90 8.30 9.60 At the 0.01 level of significance, is there evidence that the mean amount spent for lunch is different from $6.50? Follow and show the 7 steps for hypothesis testing. Determine the p-value and interpret its meaning. What assumption must you make about the population distribution...

Data were collected on the amount spent by 64 customers for lunch at a major Houston...

Data were collected on the amount spent by 64 customers for lunch at a major Houston restaurant. Based upon past studies the population standard deviation is known with $6. Round your answers to 2 decimal places. Use the critical value with 3 decimal places. At 99% confidence, what is the margin of error? Develop a 99% confidence interval estimate of the mean amount spent for lunch. Amount 20.50 14.63 23.77 29.96 29.49 32.70 9.20 20.89 28.87 15.78 18.16 12.16 11.22...

Data were collected on the amount spent for lunch by 64 customers at a major Houston...

Data were collected on the amount spent for lunch by 64 customers at a major Houston restaurant. The sample provided a sample mean of $21.5. Based upon past studies the population standard deviation is known with σ = $6. Develop a 99% confidence interval estimate of the mean amount spent for lunch.

A random sample of 29 lunch customers was taken at a restaurant The average amount of...

A random sample of 29 lunch customers was taken at a restaurant The average amount of time the customers in the sample stayed in the restaurant was 45 minutes with a standard deviation of 14 minutes. a) Compute the standard error of the mean? b) Construct a 68% confidence interval for the true average amount of time customers spent in the restaurant? c) Construct a 90% confidence interval for the true average amount of time customers spent in the restaurant?...

A random sample of 49 lunch customers was taken at a restaurant. The average amount of...

A random sample of 49 lunch customers was taken at a restaurant. The average amount of time these customers stayed in the restaurant was 45 minutes with a standard deviation of 14 minutes. a. Compute the standard error of the mean. b. Construct a 95% confidence interval for the true average amount of time customers spent in the restaurant. c. With a .95 probability, how large of a sample would have to be taken to provide a margin of error...

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The table below contains the amount that a sample of nine customers spent for lunch ($)...

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