What statistical test should we use to test hypothesis?

Q: Four students achieve the following grades on their midterm which was out of 20 marks: 4, 4, 4, 20.…

A: The mode is 4 as its is the highest occurring frequency. So it will reflect the accuracy or more…

Q: For the following scores, Participant X Y A 2 6 B 3 3 C 4 2 D 7 1 Draw a scatterplot…

A: Procedure to draw scatter plot: Draw the x axis starting from 0 to 8 with 1 unit scale. Draw the y…

Q: a leage of two trucks was compared from two different advertisements. The inform Truck A Truck B…

A:

Q: If your score on your next statistics test is converted to a z score, which of these z scores would…

A: Introduction: For a random variable, X with mean μ, and standard deviation σ, the z-score is given…

Q: A developmental psychologist who wanted to see if children who started walking earlier performed…

A:

Q: To compare the time they spent running on the wheel between the three different days (in other…

A: ANOVA To check the difference in mean excercise time of rats in three different conditions.

Q: Determine the highest level of measurement achieved by each of the given variables:e emotaun…

A: There are four levels of measurement: Nominal, Ordinal, Interval, Ratio.

Q: An environmentalist wonders whether cars get better gas mileage when using regular or premium gas.…

A: To test:H0:μd=0H1:μd<0where μd=μ1-μ2

Q: Maci is a social networking maniac! Although she prefers Instagram, she also spends a lot of time…

A: Introduction A variable is a no., characteristic which can be counted or measured.

Q: Xochitl is worried that this month’s Red Chile batch is not as spicy as last month’s. To help test…

A: We have to conduct the Dependent Two-Sample Test to test this hypothesis.

Q: The scores on a statewide chemistry exam were normally distributed with ?=73.08 and ?=6. Gabriela…

A: Given data isMean(μ)=73.08standard deviation(σ)=6

Q: During one shift, the express lane clerk recorded how many times customers violated the "10 items or…

A: Given data: From the graph, constructing frequency distribution table as: Class Interval…

Q: The grades of 15 students in their Capstone project are as follows: 89, 85, 87, 87, 90, 92, 89, 85,…

A: The data shows the grades of 15 students in their Capstone project.

Q: If Gena's score is 85, the class average is 82, and the SD is 4, what is Gena's Z-score?

A: If Gena's score is 85, the class average is 82, and the SD is 4, what is Gena's Z-score?

Q: Raymond wants to estimate the percentage of parents that use cloth diapers. He asks a randomly…

A: According to the provided information, The data set will represent the collection of response…

Q: Use the following for the next two questions: The Hershey Company wants to know if it is doing…

A: The 95% confidence interval is  millions of dollars.

Q: Cameron is birdwatching at the coast. He has seen 3 gulls and 6 other birds. Considering this data,…

A: Given : Cameron is bird-watching at the coast. He has seen 3 gulls and 6 other birds. Proportion of…

Q: n a recent marketing experiment, consumers were given one of four different types of dishwashing…

A: As given, consumers were given one of four different types of dishwashing detergent and asked to…

Q: tephanie is trying to figure out the sample size of an experiment. She knows the population SD is…

A: Solution: Given information: σ= 41.5    Population standard deviation σx= 2.7   Standard deviation…

Q: A cohort of hemophiliacs is followed to elicit information on the distribution of time to onset of…

A: A 95% confidence interval for the mean is given by mean is given by x¯±z*·sn.  A 95%  confidence…

Q: Virginia polled a large sample of individuals to find the percentage of students with known food…

A: Pie charts are commonly used to display percentage or proportional data, and typically the…

Q: The data is as follows: 2 0's, 6 1's, 10 2's, 32 3's, 50 4's, 69 5's, 50 6's, 38 7's, 19 8's, 12…

A: Given data: 2 0's, 6 1's, 10 2's, 32 3's, 50 4's, 69 5's, 50 6's, 38 7's, 19 8's, 12 9's, and 4 10's…

Q: The director of library services at a college did a survey of types of books (by subject) in the…

A: The data given for the results is listed below Subject Area Percent of Books on Subject in…