can i get help solving this problems with solutions. its an elementary statistics. Thank you

7.3 9 Cyber Monday Shopping A survey of 1000 U.S. adults found that 33% of people said that they would get no work done on Cyber Monday since they would spend all day shopping online. Find the 95% confidence inter- val of the true proportion. Screen clipping taken: 11/26/2021 4:07 PM Holiday Gifts A survey of 100 Americans found that 68% said they find it hard to buy holiday gifts that convey their true feelings. Find the 90% confidence interval of the population proportion. Screen clipping taken: 11/26/2021 4:08 PM Home Internet Access According to a study, 96% of adults ages 18-29 had internet access at home in 2015. A researcher wanted to estimate the pro- portion of undergraduate college students (18 to 29 years) with access, so she randomly sampled 180 undergraduates and found that 157 had access. Estimate the true proportion with 90% confidence. Screen clipping taken: 11/26/2021 4:08 PM Educational Television In a random sample of 200 people, 154 said that they watched educational television. Find the 90% confidence interval of the true proportion of people who watched educational television. If the television company wanted to publicize the proportion of viewers, do you think it should use the 90% confidence interval? Screen clipping taken: 11/26/2021 4:09 PM 7.4 3 Cost of an Operation A medical researcher surveyed 1 1 hospitals and found that the standard deviation for the cost for removing a person's gall bladder was $53. Assume the variable is normally distributed. Based on this, find the 99% confidence interval of the population ariance and standard deviation. Screen clipping taken: 11/26/2021 4:13 PM Age of College Students Find the 90% confidence interval for the variance and standard deviation of the ages of seniors at Oak Park College if a random sample of 24 students has a standard deviation of 2.3 years. Assume the variable is normally distributed. Screen clipping taken: 11/26/2021 4:14 PM IS Automobile Repairs The standard deviation of a sample of 15 automobile repairs at a local garage was $120.82. Assume the variable is normally distributed. Find the 90% confidence of the true variance and standard deviation. Screen clipping taken: 11/26/2021 4:14 PM Pacemaker Batteries A manufacturer of pacemakers wants the standard deviation of the lifetimes of the bat- teries to be less than 1.8 months. A sample of 20 batteries had a standard deviation of 1.6 months. Assume the vari- able is normally distributed. Find the 95% confidence interval of the standard deviation of the batteries. Based on this answer, do you feel that 1.8 months is a reason- able estimate? Screen clipping taken: 11/26/2021 4:15 PM