You have taken a random sample of size from a normal population that has a population mean of -tee and a population standard deviation of -3. Your sample, which is Sample 1 in the table below, has a mean of 7- (In the table, Sample 1 is written "S1", Sample 2 is written "S2", etc.) (4) Based on Sample 1, graph the sand 95% confidence intervals for the population mean. Use 12 for the critical value for the so confidence interval, and use 1.0 for the critical value for thelles confidence interval. (If necessary, consult a list of formulas • Enter the lower and upper limits on the graphs to show each confidence interval. Write your answers with one decimal place. For the points (and), enter the population mean, -100. 80% confidence interve wre UTC 95% cadence interval s 80% 80% 95% 95% lower upper tower upper TOLD (Press the "Generate Samples" button below to simulate taking more samples of size from the population. Notice that the confidence intervals for these samples are drawn automatically. Then complete parts (c) and (d) below the table. 51 963 $2 100.4 995 101.3 99.0 1018 53 184 995 1013 900 1018 54 996 98.7 100.5 98.2 1010 ss 99.5 986 1004 981 1009 $6 993 99 1007 98.4 1012 59 1103 994 67 996 96.7 100.5 98.2 100 58 993 99 1007 584 1012 1012 98.9 101.7 $10 996 96.7 1005 98.2 1010 511 101.2 100.3 1021 99.8 1026 $12 996 96.7 100.5 98.2 1010 513 100.6 997 101.5 99.2 1020 814 100.3 994 1012 98.9 1017 815 996 987 1005 9.2 1010 $16 101.1 1002 1020 997 1025 $17 1884 995 101.3 900 1018 1006 983 101.1 $18 997 988 $19 993 96.9 100.7 984 1012 $20 106.6 99.7 101.5 99.2 1020 1040 H40 973 Notice that for-100% of the samples, the 99% confidence interval contains the population mean. Choose the correct statement. When constructing 95% confidence intervals for 20 samples of the same size from the population, at least 95% of the samples will contain the population mean. When constructing % confidence intervals for 2 samples of the same size from the population, exactly 95% of the samples must contain the population mean. There must have been an error with the way our samples were chosen. When constructing % confidence intervals for 29 samples of the same size from the population, the percentage of the samples that contain the population mean should be close to, but it may not be exactly 95% 35% condence intervas 8 1968

The sample mean of depression scores of 16 fifth graders was 4.4 with standard deviation of 8. If the population mean of this depression score is 6, what is the calculated t score for this sample?

A researcher is interested in learning about average online hours per day for Camosun College students. Data is gathered from 50 students - mean online hours is 7.52 with a standard deviation of 2.85. Calculate the 95% CI (or alpha at 0.05) and interpret your results in a full sentence. Now calculate a 99% CI for the above. How does your answer change?   If the researcher sampled a group of 24 students and the new calculated mean and standard deviation are the same as with the larger group of 50, would the 99% CI change from b above? If yes, in what way?

In Professor Krugman’s economics course, the correlation between the students’ total scores prior to the final examination and their final‑examination scores is ?=0.5.r=0.5. The pre‑exam totals for all students in the course have mean 280280 and standard deviation 40.40. The final‑exam scores have mean 7575 and standard deviation 8.8. Professor Krugman has lost Julie’s final exam but knows that her total before the exam was 300.300. He decides to predict her final‑exam score from her pre‑exam total. (a) Which of the choices is the least‑squares regression line of final‑exam scores on pre‑exam total scores in this course?

Suppose that you are designing an instrument panel for a large industrial machine. The machine requires the person using it to reach 2 feet from a particular position. The reach from this position for adult women is known to have a mean of 2.7 feet with a standard deviation of 0.5. The reach for adult men is known to have a mean of 3.1 feet with a standard deviation of 0.7. Both women's and men's reach from this position is normally distributed. If this design is implemented, (a) what percentage of women will not be able to work on this instrument panel? (b) What percentage of men will not be able to work on this instrument panel? (c) Explain your answers to a person who has never had a course in statistics. Click here to view page 1 of the table. Click here to view page 2 of the table. Click here to view page 3 of the table. Click here to view page 4 of the table.

times for a surgical procedure are normally distributed. there are two methods. method a has a mean of 29 minutes and a standard deviation of 5 minutes, while method b has a mean of 33 minutes and a standard deviation of 25 minutes. which procedure is preferred if the procedure must be completed within 37 minutes. method a, b, or either method

For each scenario, indicate whether the parameter of interest is one proportion , a difference in two proportions , one mean (μ), a difference in means from separate samples , or the mean difference from matched pairs data,  .  Each answer can be selected once, more than once, or not at all. A tire manufacturer tested the braking performance of one of its tire models on a test track, interested in how tires perform under both wet and dry pavement conditions. The company tried the tires on 18 different car models, recording the stopping distance for half of them on wet pavement and the other half of dry pavement.   Student Computing Services surveys a random sample of students to compare the percent of students that have PCs to the percent of students that have Macs.    Married couples are asked about the number of hours of sleep they get each night. We want to see if husbands get more sleep than their wives.   36 of 75 patients receiving a treatment experienced pain relief, while only…