1-20chapter stats

2643 d 0793 93 a random sample of size 1000 is taken

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: ation of 1.2 ounces. What is the probability of finding an average in excess of 4.3 ounces of this ingredient from randomly inspected 100 gallons of regular unleaded gasoline? A. .5987 B. .4013 C. .9938 D. .0062 101. The chief chemist for a major oil/gasoline production company claims that the regular unleaded gasoline produced by the company contains on average 4 ounces of a certain ingredient. The chemist further states that the distribution of this ingredient per gallon of regular unleaded gasoline is normal and has a standard deviation of 1.2 ounces. What is the probability of finding an average less than 3.85 ounces of this ingredient from randomly inspected 64 gallons of regular unleaded gasoline? A. .1587 B. .8413 C. .1357 D. .8643 1-559 Chapter 01 - An Introduction to Business Statistics 102. In the upcoming governor's election, the most recent poll based on 900 respondents predicts that the incumbent will be reelected with 55% of the votes. From the 900 respondents, how many indicated that they would not vote for the current governor or indicated that they were undecided? A. 495 B. 450 C. 405 D. 400 103. In the upcoming governor's election, the most recent poll based on 900 respondents predicts that the incumbent will be reelected with 55% of the votes. What is A. .00825 B. .0166 C. .0247 D. .0003 ? 104. In the upcoming governor's election, the most recent poll based on 900 respondents predicts that the incumbent will be reelected with 55% of the votes. For the sake of argument, assume that 51% of the actual voters in the state support the incumbent governor (p = 0.51). Calculate the probability of observing a sample proportion of voters 0.55 or higher supporting the incumbent governor. A. 0166 B. 0247 C. 0082 D. 9918 105. It has been reported that the average time to download the home page from a government website was 0.9 seconds. Suppose that the download times were normally distributed with a standard deviation of 0.3 seconds. If random samples of 23 download times are selected describe the shape of the sampling distribution and how it was determined. A. Normal, size of sample meets the Central Limit Theorem requirement B. Normal, the original population is normal C. Skewed, the original population is not a normal distribution D. Cannot be determined with the information that is given 1-560 Chapter 01 - An Introduction to Business Statistics 106. It has been reported that the average time to download the home page from a government website was 0.9 seconds. Suppose that the download times were normally distributed with a standard deviation of 0.3 seconds. If random samples of 36 download times are selected calculate the mean of the sampling distribution of the sampling mean. A. 0.3 B. 0.15 C. 0.9 D. 0.05 107. It has been reported that the average time to download the home page from a government website was 0.9 seconds. Suppose that the download times were normally distributed with a standard deviation of 0.3 seconds. If random samples of 36 download times are selected calculate the standard deviation of the sampling distribution of the sample mean. A. 0.3 B. 0.15 C. 0.9 D. 0.05 108. It has been reported that the average time to download the home page from a government website was 0.9 seconds. Suppose that the download times were normally distributed with a standard deviation of 0.3 seconds. If random samples of 36 download times are selected 80% of the sample means will be between what two values symmetrically distributed around the population mean. A. [.648 1.152] B. [.836 .964] C. [.514 1.280] D. [.858 .942] 109. It has been reported that the average time to download the home page from a government website was 0.9 seconds. Suppose that the download times were normally distributed with a standard deviation of 0.3 seconds. If random samples of 36 download times are selected, what is the probability that the sample mean will be less than 0.84 seconds? A. .1151 B. .4522 C. .8849 D. .5478 1-561 Chapter 01 - An Introduction to Business Statistics 110. The College Student Journal (December 1992) investigated differences in traditional and nontraditional students, where nontraditional students are defined as 25 years or older and working. Based on the study results, we can assume the population mean and standard deviation for the GPA of nontraditional students is µ = 3.5 and σ = 0.5. Suppose a random sample of 100 nontraditional students is selected and each student's GPA is calculated. What is ? A. 0.5 B. 3.5 C. 7.0 D. 0.05 111. The College Student Journal (December 1992) investigated differences in traditional and nontraditional students, where nontraditional students are defined as 25 years or older and working. Based on the study results, we can assume the population mean and standard deviation for the GPA of nontraditional students is µ = 3.5 and σ = 0.5. Suppose a random sample of 100 nontraditional students is selected and each student's GPA is calculated. Calculated A. 0.5 B. 3.5 C. 7.0 D. 0.05 112. The College St...
View Full Document

Ask a homework question - tutors are online