Show all your work. Indicate clearly the methods you use, because you will be scored on the correctness of your methods as well as on the accuracy and completeness of your results and explanations.     Age (years) Frequency   Cumulative Frequency 20≤x<30 160   30≤x<40 130   40≤x<50 100   50≤x<60 115   60≤x<70 125   70≤x<80 135     The manager of a vacation resort believes that the ages of adult visitors to the resort can be modeled by a normal distribution. The manager surveyed a random sample of 765 visitors and recorded their age. A summary of the responses is shown in the frequency table, where x represents the age of the visitor. Make a histogram of the data above.             Write a few sentences to describe the distribution of ages of the adult visitors to the resort

A company is doing a hypothesis test on the variation of quality from two suppliers. Both distributions are normal, and the populations are independent. use a = 0.01 Ho:012 = 0 2 2 HA:012> σ The standard deviation of the first sample is 2.4684 with a sample size of 38. 7.9437 is the standard deviation of the second sample with a sample size of 28. The test statistic (rounded to 3 decimal places) is = O Reject the null hypothesis O Fail to reject the null hypothesis

Show all your work. Indicate clearly the methods you use, because you will be scored on the correctness of your methods as well as on the accuracy and completeness of your results and explanations. Age (years) Frequency 20≤x<30 160 30≤x<40 130 40≤x<50 100 50≤x<60 115 60≤x<70 125 70≤x<80 135 The manager of a vacation resort believes that the ages of adult visitors to the resort can be modeled by a normal distribution. The manager surveyed a random sample of 765 visitors and recorded their age. A summary of the responses is shown in the frequency table, where x represents the age of the visitor. Does the histogram provide convincing evidence that the surveyed ages come from a normal distribution? Explain your answer.

Español Over the past several months, customers at Stymie's department store have been asked to fill out customer satisfaction surveys. In the surveys, the customers rate their shopping experience on a scale of 0 to 100. Here are 24 recent ratings. 14, 16, 18, 25, 27, 34, 37, 39, 41, 45, 47, 50, 51, 53, 53, 53, 61, 61, 67, 73, 77, 83, 85, 86 圖 Send data to calculator Aa Frequency 8- 6- 5 5 4- 3 3 2- 20 Customer satisfaction rating 40 60 80 100 O Mean (a) Which measures of central tendency do O Median not exist for this data set? Choose all that O Mode apply. O None of these measures I Mean (b) Suppose that the measurement 86 (the largest measurement in the data set) were replaced by 97. Which measures of central tendency would be affected by the change? Choose all that apply. O Median O Mode O None of these measures (c) Suppose that, starting with the original data set, the largest measurement were O Mean O Median removed. Which measures of central O Mode tendency would be changed from…

Help please week 7