which image is blurry ?

everything should be good please solve it and thank you !

please ignore the "questions" , the answer to the questions doesn't need questions previous to ones I need help with and don't correlate , thank you !

please ignore the "questions number" , the answer to the questions doesn't need question , 1 It was already correct and doesn't correlate to question 2.

links are provided in order for each question , thank you !

STAT_1 2 B_Preview Score: 6.7/10 5/7 answered 0 Question 2 v ( Go to the DCMP Sampling Distribution of the Sample Mean (Continuous Population) tool at httpsilldcmathpathways.shinyapps.io/SampDist cont] . You will use this data analysis tool to simulate random samples of colleges and examine the mean annual cost of attendance for each sample: Enter the following inputs: 0 Select Population Distribution: Real Population Data 0 Select Example: College Cost The population distribution shown is the distribution of the average annual costs of attending college (in U.S. dollars) for a population of 1,909 public and private fouryear U.S. colleges. Score on last try: 1.2 of3 pts. See Details for more. > Next question You can retry this question below Generate 1,000 random samples of size 'n, = 20. According to your 1,000 samples (looking at the statistics on the third graph): What is the mean of the sampling distribution of the sample mean? 3; 7 What is the standard deviation of the sampling distribution of the sample mean? 55 7 Part A: The histogram labeled "Data Distribution (Histogram from last generated sample)" is a histogram ofthe last randomly generated sample. What is the sample mean for this sample? $|7 lo' Part B: The same sample mean generated from the last randomly generated sample should be shown on the sampling distribution of the sample mean. Use the mean and standard deviation of the simulated sampling distribution of the sample mean (from the 1,000 simulated samples) to calculate a z-score for the last observed sample mean. Write a sentence interpreting this value. 2 = (rounded to the nearest hundredth) Interpretation(fill in the blanks): The observed sample mean annual cost of attending college of $ is standard deviations above $ Part C: Write a sentence interpreting the value of the standard deviation of the sampling distribution of the sample mean that you used to calculate the z-score in Part B. A typical sample mean college annual cost for samples of size 20 will fall about $ away from the overall mean of $ Calculator Submit QuestionSTAT_1 ZB_Preview Score: 6.7/10 5/? answered 0 Question 3 V When we calculate a z-score for a statistic, as in Question 'I, Part B, we call this a standardized statistic. Question 1 used simulation to estimate the mean and standard deviation of the sample mean. Mathematically, though, we know the exact formulas for these values. The standardized sample mean is [meanofi] :Tip z _ std. deviation of :T: _ L '5 where :7: is the sample mean, 11. is the population mean, 0' is the population standard deviation, and n is the sample size. The statistic is "standardized" since it is centered to have a mean ofO and scaled to have a standard deviation of'l. If the population distribution is normal or the sample size is sufficiently large, this standardized statistic will follow a standard normal distributiona normal distribution with a mean OH) and a standard deviation of 1. Score on last try: 0.5 0\" pts. See Details for more. > Next question You can retry this question below What are the population mean and population standard deviation of the variable average annual cost of attending college? Use appropriate statistical notation. These values are displayed in the main title of the Population Distribution in the tool. (population mean) u v V =$- (population standard deviation) 0 v V =$ E Calculator Submit Question STAT_1ZB_Preview Score: 6.7/10 5/? answered X Question4 V Next question You can retry this question below Using the values from Question 3, calculate the mean and standard deviation of the sampling distribution of the sample mean for samples of size 20. Mean of the sample mean = $- Standard deviation of the sample mean = $- (to the nearest dollar) E Calculator Submit Question STAT_10D_Practice Score: 6.31/8 4/5 answered Question 1 Let's put together everything you've learned about confidence intervals for proportions, with a focus on confidence intervals for the difference in proportions between two groups. Are Instagram users more liberal than those who don't use the platform? The goal of this assignment is to use confidence intervals to determine if there is a difference in the proportions of people who have liberal political views based on whether or not they use Instagram, a social media platform. The data are from the 2016 General Social Survey (GSS). The GSS is a survey conducted every two years to gather information about behaviors and attitudes on a variety of issues for adults (18+ years old) in the United States. Survey respondents are from a list of randomly selected households. The GSS contains over 900 variables. The data for this analysis are from the gss16 dataset in the dsbox R package. The variables of interest are: . instagram: Yes if the respondent said they use Instagram; no if not; NA removed . is_liberal: Yes if the respondent identified their political views as "Slightly liberal," "Liberal," or "Extremely liberal;" no otherwise The first 15 observations for the GSS dataset are provided in the table below.The first 15 observations for the GSS dataset are provided in the table below. instagram is_liberal No Yes No No No No No No No Yes No Yes No No No Yes No Yes No No No No No Yes No No NO No No No 1 Data from the 2016 General Social Survey (GSS). (n.d.). GitHub. https://rstudio- education.github.io/dsbox/reference/gss16.html Score on last try: 2.5 of 3 pts. See Details for more. > Next question You can retry this question belowScore on last try: 2.5 of3 pts. See Details for more. > Next question You can retry this question below Use the DCMP Two Population Proportions tool for this practice assignment: mpsj/dcmathpathways.shinygpszo/Zsamplimm Select data: "From Textbook\" Dataset: "General Social Survey-GSS" Part A: Make a graphical display showing the difference in proportions of people who said they have liberal political views between those who use Instagram and those who don't. Interpret the graph and describe the relationship between using Instagram and identifying political views. There appears to be almost no difference v V d6 between the proportions V \"601\" Instagram users who have liberal political views vs. non-users who have liberal political views. Part B: Use technology to calculate the sample statistic for the difference in proportions of people having liberal political views between those who use Instagram and those who don't. Round to four decimal places. pInatagrom _ pNoInstagram : 6'71 X Part C: Based on your responses to Parts A and B, do you think there is a relationship between using Instagram and having liberal political views? Fill in the blanks. There does not seem political views, since the difference in proportions v V d\" is only about v V 0,4 to be a relationship between using Instagram and having liberal 0.01 V'lo' STAT_10D_Practice Score: 6.31/8 4/5 answered . Question 3 V Next question You can retry this question below Before calculating the confidence interval, let's check the conditions. For each condition, state whether or not it is satisfied and briefly explain your choice. Randomness: This condition is v V a\" satisfied; the survey respondents come v V o"5 from randomly selected households in the United States. Independence: This condition is v V a\" satisfied; the samples were v V 0\" independently selected. Sample size: This condition is v V 0' satisfied. There are at least 10 "successes" (have liberal views) and 10 \"failures" (do not have liberal views) in each group. In the group of lnstagram users, have liberal views and do not. In the group of non-users, have liberal views and do not. Q Calculator Submit Question STAT_10D_Practice Score: 6.31/8 4/5 answered Question 4 Score on last try: 0.25 of 1 pts. See Details for more. > Next question You can retry this question below Calculate a 95% confidence interval for the difference in proportions of people with liberal political views between those who use Instagram and those who don't. Then, interpret the interval in the context of the data. Round the endpoints of the interval to the thousandths place. Interval: 0.0671 x Interpretation: We are 95% confident that the true difference vy of in proportions of people with liberal political views between those who use Instagram and those who don't is between 0.455 x and 0. 179 X. Calculator Submit