.3  In a recent survey, 10,000 households were randomly selected. One of the questions on the survey asked how many TVs they had. The results are given in the table below. Number of TVs to number of households # of TVs # of Households  P(X=x) 0 160   1 3140   2 3790   3 1920   4 780   5 210   Total 10,000                e) What is the average number of TVs in a household?

In a student survey, forty-one part-time students were asked how many courses they were taking this term. The (incomplete) results are shown below: Please round your answer to 4 decimal places for the Relative Frequency if possible. # of Courses Frequency Relative Frequency Cumulative Frequency 1 15 0.3659 15 2 12 0.2927   ? 3   ?    ? 41  What percent of students take exactly one courses          ? %

Data was collected for 322 randomly selected 10 minute intervals. For each ten-minute interval, the number of people entering the atrium of a large mall were recorded. The data is summarized in the table below. Number  of Guests      Frequency    220 – 224 98 225 – 229 81 230 – 234 36 235 – 239 63 240 – 244 44 What is the class width for this GFDT?Class width =

The correlation between midterm and final grades for 300 students is 0.620. If 5 points are added to each midterm grade, the new r will be: a. 0.124 b. 0.57 c. 0.62 d. 0.744

In a student survey, sixty part-time students were asked how many courses they were taking this term. The (incomplete) results are shown below: Please round your answers to 4 decimal places. # of Courses Frequency Relative Frequency Cumulative Frequency 1   0.3 18 2 25   43 3 17 0.2833    What percent of students take exactly one courses? %

You want to see if it makes a difference which lane to be inwhen there is traffic. You randomly observe 296 cars as theypass by on the four lane freeway. The results are displayed inthe table below. Use a level of significance of a = 0.10.a. Complete the rest of the table by filling in theexpected frequencies:Frequency of Cars in Each LaneOutcome Frequency Expected FrequencyLane 173Lane 2Lane 3Lane 4597985

(b) How many rats learned the maze in four trials or less?

Eye Color f % Amber 5 4.81% Blue 8 7.69% Brown 82 78.85% Gray 3 2.88% Green 2 1.92% Hazel 3 2.88% Red/Violet 1 0.96% Total 104 100.00%   Comment on your finding

Save Suppose a random sample of n = 390 teenagers 13 to 17 years of age was asked if they use social media. Of those surveyed, 276 stated that they do use social media. Find the sample proportion of teenagers 13 to 17 years of age who use social media. The sample proportion is p= (Round to three decimal places as needed.)

A survey was conducted on how many texts (in average) students receive during an in-person class time. A survey data in a class in a particular day is given in the table. Number students Number of texts 1 20 2 14 12 4 5 If the average number texts that students received during this class time is 3, then determine the number of students (the value of x) that received 5 texts during the class time on that particular day.