In a recent survey, 477 CEOs of medium and large companies were asked whether they possessed...
In a recent survey, 477 CEOs of medium and large companies were asked whether they possessed an MBA degree. In the sample, 160 had MBA degrees. Give the lower bound of the 99% confidence interval for the true proportion of all CEOs who have MBAs. Take all intermediate calculations to three decimal places.
Homework Answers
Add Answer to:
In a recent survey, 477 CEOs of medium and large companies were
asked whether they possessed...
Statistic ( Inference about a population)
A management professor was in the process of investigating the relationship between education and managerial level achieved. The source of his data was a survey of 385 CEOs of medium and large companies. He discovered that there was only one CEO who did not have at least one university degree. Estimate (using a Wilson estimator) with 99% confidence the proportion of CEOs of medium and large companies with no university degrees.
A survey asked, "How many tattoos do you currently have on your body?" Of the 1233...
A survey asked, "How many tattoos do you currently have on your body?" Of the 1233 males surveyed, 185 responded that they had at least one tattoo. Of the 1028 females surveyed, 132 responded that they had at least one tattoo. Construct a 99%confidence interval to judge whether the proportion of males that have at least one tattoo differs significantly from the proportion of females that have at least one tattoo. Interpret the interval. Let p1 represent the proportion of...
A survey asked, "How many tattoos do you currently have on your body?" Of the 1205...
A survey asked, "How many tattoos do you currently have on your body?" Of the 1205 males surveyed, 181 responded that they had at least one tattoo. Of the 1051 females surveyed, 137 responded that they had at least one tattoo. Construct a 99% confidence interval to judge whether the proportion of males that have at least one tattoo differs significantly from the proportion of females that have at least one tattoo. Interpret the interval. Let p 1 represent the...
A recent General Social Survey asked, "During the last year, did anyone take something from you...
A recent General Social Survey asked, "During the last year, did anyone take something from you by using force-such as a stickup, mugging, or threat?" of 970 subjects, 25 answered yes and 945 answered no. (a) What is the statistic used to estimate the proportion of the population who were victims. (b) Find the standard error of this estimate. (3 decimal places) (c) Find the margin of error for a 99% confidence interval. (3 decimal places) d) Given the 99%...
In a recent poll, 350 people were asked if they liked skiing, and 55% said they...
In a recent poll, 350 people were asked if they liked skiing, and 55% said they did. Find the margin of error of this poll, at the 90% confidence level. As in the reading, in your calculations: --Use z1.645 for a 90% confidence interval -Use z=2 for a 95% confidence interval -Use z-2.576 for a 99% confidence interval Give your answer rounded to three decimal places. If n=560 and p (p-hat) = 0.7, construct a 99% confidence interval. As in...
In a survey conducted by a polling company, 1100 adult Americans were asked how many hours...
In a survey conducted by a polling company, 1100 adult Americans were asked how many hours they worked in the previous week. Based on the results, a 95% confidence interval for the mean number of hours worked had a lower bound of 42.7 and an upper bound of 44.5. Provide two recommendations for decreasing the margin of error of the interval. Select all that apply. A. Increase the sample size. B. Decrease the standard deviation of hours worked. C. Use...
In a survey conducted by the Gallup Organization, 1100 adult Americans were asked how many hours...
In a survey conducted by the Gallup Organization, 1100 adult Americans were asked how many hours they worked in the previous week. Based on the results, a 95% confidence interval for the mean number of hours worked had a lower bound of 42.7 and an upper bound of 44.5. Provide two recommendations for decreasing the margin of error of the interval. Select all that apply. A. Decrease the sample size. B. Increase the sample size. O C. Decrease the standard...
help! 1. In a recent survey conducted by a professor of UM, 200 students were asked...
help! 1. In a recent survey conducted by a professor of UM, 200 students were asked whether or not they have a satisfying experience with the e-learning approach adopted by the school in the current semester. Among the 200 students interviewed, 121 said they have a satisfying experience. What is the 99% confidence interval for the proportion of all UM students who have a satisfying experience with the e-learning approach? Select one: a. 0.537 to 0.673 b. 0.524 to 0.686...
A survey asked, "How many tattoos do you currently have on your body?" Of the 1207...
A survey asked, "How many tattoos do you currently have on your body?" Of the 1207 males surveyed, 187 responded that they had at least one tattoo. Of the 1098 females surveyed, 133 responded that they had at least one tattoo. Construct a 90 % confidence interval to judge whether the proportion of males that have at least one tattoo differs significantly from the proportion of females that have at least one tattoo. Interpret the interval. Let p1 represent the...
A survey asked, "How many tattoos do you currently have on your body?" Of the 1223...
A survey asked, "How many tattoos do you currently have on your body?" Of the 1223 males surveyed, 186 responded that they had at least one tattoo. Of the 1032 females surveyed, 130 responded that they had at least one tattoo. Construct a 99% confidence interval to judge whether the proportion of males that have at least one tattoo differs significantly from the proportion of females that have at least one tattoo. Interpret the interval. Let p1 represent the proportion...
A recent General Social Survey asked, "During the last year, did anyone take something from you by using force-such as a stickup, mugging, or threat?" of 970 subjects, 25 answered yes and 945 answered no. (a) What is the statistic used to estimate the proportion of the population who were victims. (b) Find the standard error of this estimate. (3 decimal places) (c) Find the margin of error for a 99% confidence interval. (3 decimal places) d) Given the 99%...
In a recent poll, 350 people were asked if they liked skiing, and 55% said they did. Find the margin of error of this poll, at the 90% confidence level. As in the reading, in your calculations: --Use z1.645 for a 90% confidence interval -Use z=2 for a 95% confidence interval -Use z-2.576 for a 99% confidence interval Give your answer rounded to three decimal places. If n=560 and p (p-hat) = 0.7, construct a 99% confidence interval. As in...
In a survey conducted by a polling company, 1100 adult Americans were asked how many hours they worked in the previous week. Based on the results, a 95% confidence interval for the mean number of hours worked had a lower bound of 42.7 and an upper bound of 44.5. Provide two recommendations for decreasing the margin of error of the interval. Select all that apply. A. Increase the sample size. B. Decrease the standard deviation of hours worked. C. Use...
In a survey conducted by the Gallup Organization, 1100 adult Americans were asked how many hours they worked in the previous week. Based on the results, a 95% confidence interval for the mean number of hours worked had a lower bound of 42.7 and an upper bound of 44.5. Provide two recommendations for decreasing the margin of error of the interval. Select all that apply. A. Decrease the sample size. B. Increase the sample size. O C. Decrease the standard...
A survey asked, "How many tattoos do you currently have on your body?" Of the 1223 males surveyed, 186 responded that they had at least one tattoo. Of the 1032 females surveyed, 130 responded that they had at least one tattoo. Construct a 99% confidence interval to judge whether the proportion of males that have at least one tattoo differs significantly from the proportion of females that have at least one tattoo. Interpret the interval. Let p1 represent the proportion...
Most questions answered within 3 hours.
-
An empty test tube weighs 15.923 grams. Then,
MgCl2•6H2O is added into the test tube. After...
asked 33 minutes ago -
Please answer true or false. Words
cannot be changed or added in to make it true...
asked 31 minutes ago -
(a) A piston at 6.1 atm contains a gas that occupies a volume of
3.5 L....
asked 32 minutes ago -
Assume memory access is 10 units of time and disk access is
10000 units of time....
asked 51 minutes ago -
1. Are all good samples random?
2. Magazines often report surveys giving statistics such as “63%...
asked 1 hour ago -
Under all the various types of market structures, firms
must eventually earn some economic profits for...
asked 59 minutes ago -
Consider the following fitness regime for a single locus trait
with two co-dominant alleles: w11 =...
asked 1 hour ago -
A large cable company reports the following.
80% of its customers subscribe to its cable TV...
asked 1 hour ago -
Please answer the question in brief.
Discuss the role of ERP in organizations. Are ERP tools...
asked 1 hour ago -
Discuss the pros and cons of collaborative software such
as SameTime. Does it increase productivity? What...
asked 1 hour ago -
Buying your in-laws a gift because it’s expected is
due to the ____________ motive of gift-giving....
asked 1 hour ago -
Calculate the expected value, the variance, and the standard
deviation of the given random variable X....
asked 2 hours ago