Construct your own story problem using the data below, answer it. X= 148 E = 0.91 95% level of confidence
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Q: Illustrate the formula for the confidence interval?
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Q: Kindly tell what is confidence interval in stats thanks.
A: An essential idea in statistics is a confidence interval (CI), which provides a range that, with a…
Q: 6. Explain what this confidence interval means to your boss, who has never taken a statistics class.…
A: What is confidence interval and explain it to non statistics person.
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Q: Find z for a 90% confidence level. Round your answer to two decimal places.
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A: We have to convert the estimate and confidence interval into the percentage.
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Q: Briefly discuss the meaning of a 95% confidence interval and a 99% confidence interval and how they…
A: A confidence interval is a range of values that quantifies the uncertainty or level of confidence…
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Q: (a) Var(X + Y ) = Var(X)+ Var(Y) (b) Ε(XY) - (EX) (EYΥ) (c) E(X + Y ) = EX+ EY
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A: As it is calculated that, 90% confidence interval for mean is, (295753.6,464478.4)
Q: Describe when you would use a t-score instead of a z-score when finding a confidence interval.
A: Describe in what conditions t-score would be used instead of a z-score when finding a confidence…
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- A hospital director is told that 54 % of the treated patients are insured. The director wants to test the claim that the percentage of insured patients is less than the expected percentage. A sample of 280 patients found that 140 were insured. Find the value of the test statistic. Round your answer to two decimal places. Answer How to enter your answer (opens in new window) Keypad Keyboard Shortcuts TablesYou are a researcher studying a certain species of fish in a local lake. You gather a random sample of 19 fish of this species and record the lengths (in centimeters) of the fish. The data is displayed in the table below. Estimate the mean length of all fish of this type in the lake. Use a 99% confidence level. 9.1 9 8.6 5.8 9.8 7.4 9.1 9.5 8.2 8.9 9.3 7.8 9 9.6 10.4 13.6 7.2 10.1 8.9 a) Find the confidence interval: b) What is the margin of error of your interval? c) Interpret your 99% confidence interval in contextUsing the same data and information. Please answer this: Should you be encouraging or discouraging credit card sales? In answering this question, consider the following: Is the proportion of credit and non-credit sales significantly different? (a=.05) Is the average sale amount for credit sales different than the average sales amount for non-credit sales? (a=.05)
- See the graph of data below to answer the following question Obtain a 95% confidence interval for the difference between the mean rates of return. Interpret the interval.For the same sample statistics, which level of confidence would produce the widest confidence interval? Explain your reasoning. Choose the correct answer below. 99%, because as the level of confidence increases, ze decreases. 99%, because as the level of confidence increases, Z increases. O 90%, because as the level of confidence decreases, ze increases. 90%, because as the level of confidence decreases, Zc decreases.Name: Statistics 1. An investigative reporter contacts a random sample of hotels, and finds a 95% confidence interval for the proportion of hotels in the United States that have reported having bedbugs is (0.04, 0.11). a. Interpret this confidence interval in context. F3 80 b. A national hospitality organization had reported that only 5% of hotels have experienced problems with bedbugs. Does this reporter have compelling evidence that the true proportion is really higher? Explain. c. How could the reporter estimate this proportion with a smaller margin of error? a. Identify the parameter, p, 2. To estimate how often someone runs a red light in Cyber City, a student watched traffic for a while at several randomly selected intersections. Drivers ran the red light during 43 of 240 light changes she observed. Q O Period: Quiz (ch 16+17) F4 9 F5 Page 1 / 2 c F6 8 + F7 Date: : DII F8 DD F9