Can you show me how to calculate the Z-score for the following confidence intervals 90%
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Can you show me how to calculate the Z-score for the following confidence intervals
90%
91%
95%
96%
97%
98%
99%
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- Suppose you want to estimate the proportion of cars that are sport utility vehicles (SUVs) being driven in Kansas City, Missouri, at rush hour by standing on the corner of I-70 and I-470 and counting SUVs. You believe the figure is no higher than 0.40. If you want the error of the confidence interval to be no greater than .03, how many cars should you randomly sample? Use a 90% level of confidence. Appendix A Statistical Tables (Round your answer up to the nearest integer.) Sample enter a number of cars rounded to the nearest integerIn a random sample of 250 homeowners from a population of homeowners in a Florida resort community, 32 report that they had water damage during the past rainy season. The endpoints of a 95% confidence interval for the proportion of all homeowners who had water damage are closest to which of the following? a. 0.081 to 0.175 b. 0.073 to 0.182 c. 0.093 to 0.163 d. 0.087 to 0.169A physicist examines 44 seawater samples for iron concentration. The mean iron concentration for the sample data is 0.1850.185 cc/cubic meter with a standard deviation of 0.04460.0446. Determine the 80%80% confidence interval for the population mean iron concentration. Assume the population is approximately normal.
- Using the standard normal probabilities Z-Table, what are the Z-scores for the following confidence intervals from the standard normal probabilities Z-Table a) 90 b) 95 c) 96 d) 97 e) 98 f) 99As employees leave a company, they are asked to rate their level of job satisfaction during the time they were employed by the company. A sample set of scores (out of a maximum of 10) is provided below. 3 6 4 4 5 2 1 3 2 5 3 7 2 2 3 1 9 1 Use the information provided in the table to calculate: The median; The mode; The mean; The lower quartile (Q1); The upper quartile (Q3); The interquartile range (IQR); The standard deviation. State whether or not the ex-employees were likely to have left the company as a result of lack of job satisfaction. Use the statistics above to justify your conclusion. Discuss in which ways the company could benefit from making these statistics available to its current employees.General Motors would like an estimate of the chance that Tesla will bring the cost of batteries down from $300 per kWh to $70. Dr. Tetlock has developed a process whereby selected teams are better estimators of future probabilities than experts, General Motors is willing to pay Dr. Tetlock for his teams' O scenarios O contingency plans O forecasts
- 1.The reported unemployment is 5.5% of the population. What measurement scale is used to measure unemployment? Interval Nominal Ordinal Ratio 2.Which one of the following is NOT an example of discrete data? Number of employees reporting in sick Number of households watching the Home Shopping Network Number of miles between New York City and Chicago Number of members of the Denver Lions ClubAbout 8% of the U.S. population catches the flu each season. Assuming everyone has equal probability of catching the flu, about what are the odds of catching the flu in a given season? 1. 1 in 8 2. 1 in 12 3. 1 in 18 4. 1 in 80Risk analysis intervals are preferred over chance and consequence numbers for unknown reasons.
- 10 Investors will be indifferent between two investments if both investments have the same expected return. Select one: True FalseAttendance at Orlando's newest Disneylike attraction, Lego World, has been as follows: Quarter Guests (in thousands) Quarter Guests (in thousands) Winter Year 1 63 Summer Year 2 120 Spring Year 1 99 Fall Year 2 54 Summer Year 1 149 Winter Year 3 94 Fall Year 1 75 Spring Year 3 151 Winter Year 2 64 Summer Year 3 210 Spring Year 2 83 Fall Year 3 99 Part 2 Based on the given attendance, the seasonal indices for each of the seasons are (round your responses to three decimal places): Season Index Winter enter your response hereAll patients admitted to a particular hospital can be released on the same day or kept overnight forobservation. In a sample of 2550 patients, 1020 were kept overnight for observationa) What is the point estimate ?̂for the proportion of all patients kept overnight forobservation? [1]b) Construct a 99% confidence interval for the proportion of all patients kept overnight forobservation.