A statistic is a number that... describes a characteristic of a population of scores. describes a characteristic of a sample of scores. is never used to estimate or make a decision about a parameter. summarizes all the individuals a researcher is interested in.

Researchers want to know which food chain makes people the happiest. Researchers randomly assign participants to eat at either Chipotle, Qdoba, or California Tortilla for lunch every day for one week. At the end of the week, researchers measured the participants' happiness levels. Chipotle Qdoba California Tortilla 86 68 80 89 62 72 97 87 78 79 67 68 81 76 89 What is the mean squares between (S,)? Please compute to 4 decimal places.

Determine whether the data is from a primary or secondary source. Primary       Secondary

The mean scores for students in a statistics course​ (by major) are shown below. What is the mean score for the​ class? 9 engineering​ majors: 90 5 math​ majors: 94 13 business​ majors: 76 The​ class's mean score is________ ​(Type an integer or a decimal rounded to two decimal places as​ needed.)

Explain the meaning of the specified term. Distribution of a data set

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 table below shows the scores of a group of students on a 10-point quiz. Test Score Frequency 3 1 4 1 7 4 8 4 9. 10 2 The mean score on this test is: The median score on this test is: Check Answer

Next question The ages (in years) of a random sample of shoppers at a gaming store are shown. Determine the range, mean, variance, and sta the sample data set. 12, 16, 23, 14, 17, 18, 21, 18, 15, 15 9 ...... The range is: (Simplify your answer.)

The table below shows the scores of a group of students on a 10-point quiz. Test Score Frequency 3 4 4 2 5 2 6 3 7 1 8 4 9 2 10 1 The mean score on this test is: IncorrectThe median score on this test is: Show your work

A statistic is a measure that describes a population characteristic.