According to a 2019 survey by Sleepopolis, 34% of American adults sleep with some form of "comfort object"such as a stuffed animal or blanket. Would it be unusual for a random sample of 400 American adults to result in Americans to result in 160 or more who sleep with a comfort object? (sentences)

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A sample of 120 employees of a company is selected, and the average age is 37 is an example of                                    . Survey responses of "good, better, best" is an example of                                     . A tax auditor selects every 1000th income tax return to audit is an example of                                       . The number of floors in a building is an example of

A high school track coach wanted to test whether giving the students an energy drink could affect performance during the 100 meter race. The coach split the 26 boys into two equal sized groups, where Group 1 was given the energy drink and Group 2 was not. The 100 meter race times were recorded during practice and shown in the table below. What inference can be made about the results? Group 1 Group 2 12.2 13 12.5 12.3 13.3 12.8 12.9 13 13 13.8 12.1 13 13 13 13 13 12.1 13 13 13 12.1 13 12.8 13 13 12.6     Mean: 12.7 Mean: 13   Since the simulation shows ( many cases or free cases )?  where a mean  difference of ( solve for this answer )   or less occurred when the groups were re-randomized, it can be inferred that the mean difference observed in the study was ( very possibly or very unlikely )  ?due to the random assignment of participants into groups, so the results of the study are (…

Perform a hypothesis proportion test for the number of iPhone users on Verizon and AT&T for the following data. Over a 2 day period, recording the number of phone customers for AT&T and Verizon, there were a total of 47 total Verizon customers. 29 of those 47 opened an apple iPhone. For AT&T, there were a total of 41 customers. 22 of those 41 owned an apple iPhone.

Maddie conducts a study to see if listening to music helps students learn math.  She surveys a random sample of 250 college sophomores who completed a math class within the past six months.  She asks them to indicate how frequently they listened to music while studying math.  The students also report their final grade in the math class at the end of the semester.   Select the statement below that is false.     There is no placebo in this study.     Maddie conducted an observational study.     A confounding variable could be how often the participants studied math.     The population Maddie studied was 250 college sophomores.

We are interested in looking at the effect of a baseball player’s free agent status on their salary. We look at 337 baseball players and categorize them as either having a high salary (above 2 million) or not, and as either being free agents or not. ------------------------------ You also wonder if having a high batting average affects the salary of baseball players. You classify all 370 baseball players as having a high batting average if it is over .300.   1. The given χ2test table gives many test statistics. The row we want to look at is labeled Pearson Chi-Square. Give the test statistic, the degrees of freedom, and the p-value. 2. At a significance level of .05, what can you conclude in the context of this problem?

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A psychologist wanta to determine the effect of relaxing music on a person's reaction to a stressful event. Participants were randomly assigned to one of three groups. A participant was brought into a room with no windows and only one door. In the background, either soft classical music, or no music at all was playing. After a set amount of time, a fire alarm went off, and smoke started to come from under the door. A hidden video camera records the participants behavior that is later scored by the experimenter for level of panic from 0-100. Which statistical test would be best to determine if there is a significant difference between groups?  One sample t test Dependent samples t test Independent t test ANOVA

If a study determines the difference in average salary for subpopulations of people with blue eyes and people with brown eyes is not signaficant, then the populations of blue eyed people and brown eyed people are _______ different salaries... unlikey to have very likely to have guranteed to have guranteed to not have