A gasoline distributor wonders whether an individual's income level influences the grade of gasoline purchased. The following is a contingency table from a random sample of 300 individuals. Personal Income Less than $30,000 Type of Gasoline Regular Premium Extra Premium 80 3030 $30,000 or More 70 40 30 50 Using a = .05, observed (calculated) chi-square value is Provide your answer to the nearest two decimal places.

A. Which one is greater the mean or the median? Which one is better measured of the center the median or the mean? Show work B. Find the mode C. Find the median D. Find the mean (even though we must round to the one decimal place to make computations easy round you’re mean to the nearest minute)

Researchers wondered whether the size of a person's brain was related to the individual's mental capacity. They selected a sample of 5 females and 5 males and measured their MRI image pixel counts and IQ scores. Females Males MRI IQ MRI IG The data is reported to the right. Complete parts (a) through (d) below 139 858,472 140 955,003 935,494 924,059 1.079.550 1,001.121 Click the icon to view the critical values table. 991,305 138 141 857,782 833,868 790,619 133 135 132 141 135 140 AMRI 1,080,000- AIO 145 AIO 145- AMRI 1,080,000 780,000 130 130 780,000 130 780,000 780,000 130 1,080,000 145 1,080,000 MRI 145 MRI (b) Compute the linear correlation coefficient between MRI count and IQ. Are MRI count and IQ linearly related? Select the correct choice below and, if necessary, fill in the answer box to complete your choice. (Round to three decimal places as needed.) A. Yes, MRI count and IQ are linearly related since the linear correlation coefficient is O B. No. MRI count and IQ are not…

The scores and their percent of the final grade for a statistics student are given. What is the student's weighted mean score? The student's weighted mean score is (Simplify your answer. Round to two decimal places as needed.) Homework Quiz Quiz Project Final Exam Score Percent of final grade 86 10 83 10 98 10 98 40 89 30

The arithmetic mean for age in this sample is ______________________.   Question 10 options:   62.70   64.00   65.46   66.49

Please help me solve this? Thanks

The frequency table below gives the frequency of exam scores rounded to the nearest 5%. Find the mean and round to one decimal place as needed. Number Percentages of on an Exam 65 70 75 80 85 90 95 100 Students 4 8 7 11 9 7 2 2

During an experiment, the following times (in seconds) were recorded. Find the mean. 6.3, 5.4, 6, 3.2, 5.4, 5.5 ... The mean is (Round to one decimal place as needed.) ...

Refer to the figure at the right. At a= 0.10, can you reject the claim that the proportion of 18 to 24-year-olds living in their parents' homes in 2000 was the same for men and women? Assume the survey included a random sample of 270 men and 278 women. Percentage of 18- to 24-year olds living in parents' homes 70, 60.4% 45% 54.6% 50.3% 2000 2012 Men Women Identify the null and alternative hypotheses. Choose the correct answer below. O B. Ho: P, * P2 Ha: P1 = P2 OD. Ho: P1 > P2 YA. Ho: P1 = P2 H3: P, * P2 OC. Ho: P, P2 Ha: P, SP2 Find the critical value(s). The critical value(s) is(are). (Round to two decimal places as needed. Use a comma to separate answers as needed.)

Estimate the mean of the number of pull-ups completed by students during a gym class given in the following grouped frequency table. Round the final answer to one decimal place. Value Interval   Frequency  2-5 11 6-9 6 10-13 3