a. A researcher interested in the texting habits of high school students in the United States. The researcher selects a group, of 100 students, measures the number of text message that each individual sends each day, and calculate. the average number for the group. Identify the population for this study. Identify the sample for this The average number that the researcher calculated is, an example of a --------·

Blood pressure: A blood pressure measurement consists of two numbers: the systolic pressure, which is the maximum pressure taken when the heart is contracting, and the diastolic pressure, which is the minimum pressure taken at the beginning of the heartbeat. Blood pressures were measured, in millimeters of mercury, for a sample of 7 adults. The following table presents the results. Systolic 116 107 105 113 118 133 110 Diastolic 70 71 66 77 88 91 74 Construct a 99% confidence interval for the slope. Round the answers to at least four decimal places.

You are the operations manager for an airline and you are considering a higher fare level for passengers in aisle seats. How many randomly selected air passengers must you survey? Assume that you want to be 95% confident that the sample percentage is within 4.5 percentage points of the true population percentage. Complete parts (a) and (b) below. a. Assume that nothing is known about the percentage of passengers who prefer aisle seats. n= (Round up to the nearest integer.) b. Assume that a prior survey suggests that about 32% of air passengers prefer an aisle seat. n= (Round up to the nearest integer.)

Subject : Basic Statistics 2. I've posted an image of the question.

was collected for 180 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 60 - 69 17 70 - 79 42 80 - 89 90 - 99 38 100 - 109 55 What is the class width for this GFDT? Class width= 10 Question Help: Message instructor Submit Question It is the user's responsibility to inspect all PPE before use to ensure proper integrity. Do not perform work without PPE of acceptable quality All PPE must adhere to requirements detailed e W X withous chrys prt sc F10 F5 F7 9 ! Bi 4x F1 C F2 28 < F3 # C 0x F4 $ % F6 A 6 8 & 7 F8 F9 8 home 0 end F12

The highway speeds of 100 cars are summarized in the frequency distribution below. Find the estimated mean speed. Speed (mph) 30-39 40-49 50-59 60-69 70-79 Cars 3. 16 50 18 13 O A. 59.5 mph O B. 62.4 mph O C. 22.8 mph O D. 56.7 mph

A sample of prices for eight television sets available at a local electronics store is given below: 204 238 302 256 176 184 154 256 Find the mean, median, and mode for this sample. Sample Mean = Sample Median = Sample Mode %3D