In 2007 the New York Times reported that the median annual household income in the UnitedStates was $55,500 (New York Times website, August, 21, 2013). Answer the followingquestions based on the following sample of 14 household incomes for 2013 ($1000s).49.4 52.4 53.4 51.3 52.1 48.7 52.152.2 64.5 51.6 46.5 52.9 52.5 51.2a. What is the median household income for the sample data for 2013?b. Based on the sample data, estimate the percentage change in the median householdincome from 2007 to 2013.c. Compute the first and third quartiles.d. Provide a five-number summary

Determine what the key terms refer to in the following survey. To determine the average number of classes Oxnard College students were taking, a group of 26 Oxnard College students answered the following question: How many classes you are taking this semester? Link the following terms to the appropriate statement. | Sample | Population Statistic Parameter a. The average number of classes of all students in Oxnard College is 2.9 b. The 26 Oxnard College students who were surveyed c. The average number of classes of those 26 students in the sample is 2.3 d. All students in Oxnard College

According to the IRS, individuals filing federal income tax returns prior to March 31 received an average refund of $1,078  in 2018 . Consider the population of "last-minute" filers who mail their tax return during the last five days of the income tax period (typically April 10  to April 15).   b. For a sample 400 of  individuals who filed a tax return between April 10 and 15 , the sample mean refund was $920. Based on prior experience a population standard deviation of a=1,800  may be assumed. What is the p  -value (to 4 decimals)? c. Using , can you conclude that the population mean refund for "last minute" filers is less than the population mean refund for early filers? yes or no d. Repeat the preceding hypothesis test using the critical value approach. Using a=0.05 what is the critical value for the test statistic (to  3  decimals)? Enter negative value as negative number. State the rejection rule: Reject  if  is  the critical value.  choices:  greater than or equal to,   greater…

1. Explain the difference between z-tests (which use categorical data), and t-tests (which use numerical data). 2. Conduct a t-test, both when given statistics, and when given data. 3. Conduct a t-test, 2-sample t-test, and paired t-test. 4. Differentiate between the five types of tests we have learned so far.

Help. a. About what percent of women in North Arerica are between 58 and 68.5 inches tall? b. About what percent of women in North America are less than 65 inches tall? c. In what range do the middle 99.7% of women's height lie? d. About what percent of women in North America are at least 61.5 inches tal?

find mean median and mode 10.2,10.5,10.7,10.9,10.9,11,11,11,11,11.1,11.1,11.2,11.5,11.6,11.8,11.9,12

Determine whether the underlined number is a statistic or a parameter. in a study of all 4622 professors at a college, it is found that 40% own a television.

An insurance company crashed four cars of the same model at 5 miles per hour. The costs of repair for each of the four crashes were $444, $447, $470, and $207 O. Compute the mean, median, and mode cost of repair. Compute the mean cost of repair. Select the correct choice below and, if necessary, fill in the answer box to complete your choice. O A. The mean cost of repair is $ (Round to the nearest cent as needed.) O B. The mean does not exist. Compute the median cost of repair. Select the correct choice below and, if necessary, fill in the answer box to complete your choice. O A. The median cost of repair is $ (Round to the nearest cent as needed.) O B. The median does not exist. Compute the mode cost of repair. Select the correct choice below and, if necessary, fill in the answer box to complete your choice. O A. The mode cost of repair is $ (Round to the nearest cent as needed.) O B. The mode does not exist.