This is a question of business Statistics . Take your time and provide correct answer pls .
There are 6 questions
Please answer the below questions correctly . Tutors provided with wrong answers and i have only one attempt left . Please read the question very carefully .
Please provide accurate answers please check the decimal places
Question 1 1 point: Save Answer Assume that the population ofa store customers is innite. For this population, the proportion of of those customers who hug.r the service plan is 0.1. For the sample size of211, nd the standard deviation of the sampling distribution of the sample pro portion {standard er ro r}. Round your answer to four decimal places. E Question 2 1 points Save Answer If the sample stadard deviaiton is equal to 38.27 and the sample size is 60, what is the margin of error for the corresponding 959% confidence interval to estimate the population mean? Use Excel and round your answer to 2 decimals.Question 3 1 points Save Answer The population size is 505. The standard deviation of the population is 14.3. For the sample size of 120, nd the standard deviation of the sampling distribution of the sample mean [standard error). Round your answer to two decimal places. Question 4 1 points Save Answer A study is planned to be conducted to verify what proportion of customers upgrade their internet account. A preliminary sample was taken that showed the proportion of customers upgrading was 0.31. This proporiton was used as a planning value. With this planning value. what sample size must now be taken for the 95% condence interval to have the margin of error of 0.069? Use the fact that 95% of normally distributed observations are within 1.96 standard deuiaitons. live your answer with 2 decimals. Do NOT round the sampe size to a whole number. For example, ifyou obtain 456.76 for the sample size. enter this value, not 457. Question 5 2 points Save Answer If the proportion of Mastercard transactions in a sample of various credit card transactions is equal to 0.375 and the sample size is 96. what is the margin oferror for the corresponding 94% condence interval to estimate the proportion iof Mastertard transations in the population? Assume that the (onditions for the sampling distribution to be approximately normal are satised. Use Excel to calculate and round your answer to I decimals. Question 6 2 points Save Answer To test the reliability of electric dewces. a sample of 35 devices was taken. The mean number of minutes that the devices in the samp|_e performed Without errors was 182. The sample standard deviation was 10.6. What was the left boundary of 93% condence interval to estimate the population mean? Use Excel for all computations and round your nal answer to 2 decimals
