You may need to use the appropriate appendix table or technology to answer this question. In the spring of 2017, the Consumer Reports National Research Center conducted a survey of 1,007 adults to learn about their major healthcare concerns. The survey results showed that 585 of the respondents lack confidence they will be able to afford health insurance in the future. (a) What is the point estimate of the population proportion of adults who lack confidence they will be able to afford health insurance in the future. (Round your answer to two decimal places.) (b) At 90% confidence, what is the margin of error? (Round your answer to four decimal places.) (c) Develop a 90% confidence interval for the population proportion of adults who lack confidence they will be able to afford health insurance in the future. (Round your answer to four decimal places.) to (d) Develop a 95% confidence interval for this population proportion. (Round your answer to four decimal places.) to

The following boxplots represent the estimates of the lifespan of an elephant (in years) given by 11 male and 8 female eleven-year olds. Male estimates of elephant life span 20 40 60 80 100 Estimated life span (years) Female estimates of elephant life span 20 40 60 80 100 Estimated life span (years) (Note that the tables of summary values have not been included in these boxplots as this question is assessing your understanding of the shape of the boxplots.) Choose the two options from the list below that are true. Select one or more: O The median of the male estimates is greater than the median of the female estimates. The interquartile range of the male estimates is greater than the range of the female estimates. All the male estimates are less than the upper quartile of the female estimates. O The median of the male estimates is greater than the third quartile of the female estimates. O The range of the male estimates is smaller than the range of the female estimates.

Consider a survey in which 1000 people are asked “How often do you go to the dentist?”  The variable of interest in this study is

Betsy is interested in predicting how many 75-year-olds will develop Alzheimer’s disease and is using as predictors level of education and general physical health graded on a scale from 1 to 10. But she is interested in using other predictor variables as well. Answer the following questions:What criteria should she use in the selection of other predictors? Why?Name two other predictors that you think might be related to the development of Alzheimer’s disease.With the four predictor variables—level of education and general physical health and the two new ones that you named in (b)—draw out what the model of the regression equation would look like.

The class I'm taking is statistics! I am completely stuck. Need help. I have attached the problem. Please view attachment before answering. I need help with part C. thank you in advance!

The report "Who Borrows Most? Bachelor's Degree Recipients with High Levels of Student Debt"+ reported the following percentiles for amount of student debt for those graduating with a bachelor's degree in 2010. 10th percentile = $0 25th percentile = $0 50th percentile = $11,000 75th percentile = $24,600 90th percentile = $39,300 For each of these percentiles, interpret the value of the percentile. (Select all that apply.) 10th percentile At least 10% of students owe nothing. Less than 10% of students owe nothing. At most 10% of students owe nothing. 25th percentile O At least 25% of students owe nothing. Less than 25% of students owe nothing. At most 25% of students owe nothing. 50th percentile O 50% of the students owe $11,000 or less. O 50% of the students owe exactly $11,000. 50% of the students owe at least $11,000. 75th percentile 75% of the students owe $24,600 or less. 75% of the students owe exactly $24,600. O 75% of the students owe more than $24,600. 90th percentile 90% of…

Fueleconomy.gov, the official US government source for fuel economy information, allows users to share gas mileage information on their vehicles. The histogram below shows the distribution of gas mileage (city and highway combined) in miles per gallon (MPG) from 22 users who drive a 2008 Nissan Sentra (2WD). Note that these data are user estimates and since the source data cannot be verified, the accuracy of these estimates are not guaranteed. Nissan Sentra (2WD) from fueleconomy.gov                             Average MPG                             Mean 29.41             Standard Error 0.863153773             Median 30.15             Mode 27.8             Standard Deviation 4.05             Sample Variance 16.39075758             Kurtosis 0.08349459             Skewness -0.663433157             Range 15.4             Minimum 19.8             Maximum 35.2             Sum 647.1…

The preeminent basketball philosopher Rasheed Wallace popularized the phrase, "Ball don't Lie." This phrase means that if a foul was called incorrectly, the free-throw shooter is more likely to miss their shots. (We can think of this as a sort of Basketball Karma.) Due to the recent "Last Two Minute Report," we now have some data to test this claim. Of the 177 free throws awarded incorrectly, the shooter made 78.5%. Use this information to test the claim, with a .05 level of significance, that the percentage of made free throws after an incorrect foul call is less than 80%, which is the FT Percentage for an average NBA player. Round your answers to three decimal places or to the nearest tenth of a percent. (e.g. .021 or 2.1%) For credit, the hypothesis test must contain: 1) Claim in terms of the appropriate parameter (e.g. LaTeX: \mu=\:4.5\:miles) 2) Null and alternative hypothesis 3) Sample evidence used 4) Test stat (z or t) , p-value and direction of test. (right, left or…

"Bullying," according to noted expert Dan Olweus, "poisons the educational environment and affects the learning of every child." Bullying and victimization are evident as early as preschool, with the problem peaking in middle school. Suppose you are interested in the emotional well-being of not only the victims but also bystanders, bullies, and those who bully but who are also victims (bully-victims). You decide to measure depression in a group of victims and a group of bully-victims using a 26-item, 3-point depression scale. Assume scores on the depression scale are normally distributed and that the variances of the depression scores are the same among victims and bully-victims. The group of 25 victims scored an average of 25.3 with a sample standard deviation of 9 on the depression scale. The group of 23 bully-victims scored an average of 20.5 with a sample standard deviation of 8 on the same scale. You do not have any presupposed assumptions about whether victims or bully-victims…

12.2.84 The number of successes and the sample size for a simple random sample from a population are given below. x = 6, n = 200, Ho:p= 0.02, Hạ: p# 0.02, a = 0.05 a. Determine the sample proportion. b. Decide whether using the one-proportion z-test is appropriate. c. If appropriate, use the one-proportion z-test to perform the specified hypothesis test. Click here to view a table of areas under the standard normal curve for negative values of z. Click here to view a table of areas under the standard normal curve for positive values of z. a. The sample proportion is. (Type an integer or a decimal. Do not round.)