In a 2015 study entitled How Undergraduate Students Use Credit Cards, it was reported that undergraduate students have a mean credit card balance higher than $3000. This figure was an all-time high and had increased 42% over the previous five years. Assume that a current study is being conducted to determine if it can be concluded that the mean credit card balance for undergraduate students has continued to increase compared to the report. See the sample below of undergraduate students in 2015 and different undergraduate students in 2019.  What type of t-test should be used here?  Credit Cards Students in 2015 Students in 2019 2500 3300 2200 5450 1500 8000 930 2000 5300 870 1150 250 2700 3000 3300 2200 Group of answer choices a) One Sample b) Paired Samples c) Independent Samples

A credit score is used by credit agencies (such as mortgage companies and banks) to assess the creditworthiness of individuals. Values range from 300 to 850, with a credit score over 700 considered to be a quality credit risk. According to a survey. the mean credit score is 709.1. A credit analyst wondered whether high-income individuals (incomes in excess of $100,000 per year) had higher credit scores. He obtained a random sample of 44 high-income individuals and found the sample mean credit score to be 722.4 with a standard deviation of 83.5. Conduct the appropriate test to determine if high-income individuals have higher credit scores at the a = 0.05 level of significance. State the null and altenative hypotheses H, P (Type integers or decimals. Do not round.) Identify the t-statistic. h= (Round to two decimal places as needed.) Identify the P-value P-value = (Round to three decimal places as needed.) Make a conclusion regarding the hypothesis the null hypothesis. There V sufficient…

The New York Times reported that Apple has unveiled a new iPad marketed specifically to school districts for use by students (The New York Times website). The 9.7-inch iPads will have faster processors and a cheaper price point in an effort to take market share away from Google Chromebooks in public school districts. Suppose that the following data represent the percentages of students currently using Apple iPads for a sample of 18 U.S. public school districts. Click on the datafile logo to reference the data. DATA file a. Compute the mean and median percentage of students currently using Apple iPads. (to 2 decimals) (to the nearest whole number) Mean Median 15 22 12 21 26 18 42 29 64 20 15 22 18 24 27 24 26 19 Range b. Compute the first and third quartiles for these data. (to 2 decimals) First quartile Third quartile (to 2 decimals) c. Compute the range and interquartile range for these data. (to the nearest whole number) (to 2 decimals) Interquartile range d. Compute the variance and…

TechBuzz is an IT company that monitors the status of large data warehouses. According to TechBuzz, last year the majority of the data servers used by energy-based companies were over-utilized. A sample of 190 servers (all used by energy-based companies) showed that 142 were over-utilized, 12 were used efficiently, and 36 were underutilized. a. What is the point estimate of the proportion of the servers that were under-utilized? b. Determine the margin of error and provide a 95% confidence interval for the proportion of the servers that were over-utilized. c. What is the minimum sam