A psychologist claims that less than​ 25.8% of the population suffers from professional problems due to fear of public speaking. In a random sample of 357 adults it was found that 96 of them suffer from fear of public speaking.  Use p-value method​ to agree or disagree with the true percentage of the population that suffers from fear of public speaking. Show all your work and enter the test statistic. show formulas and draw all curves.

Q: esearch scientist wishes to test the claim that the mean number of units taken by community college…

A: From the given information, We see that no information about the normality of the population is…

Q: An insurance company crashed four cars of the same model at 5 miles per hour. The costs of repair…

A:

Q: Give an example of a study that would collect univariate and quantitative data.

A: Give an example of a study that would collect univariate and quantitative data.

Q: Which has a higher median?   actresses both have the same median data is needed to tell actors

A: Which has a higher median? We know that median is the middle number in a sorted, ascending or…

Q: The blue catfish (Ictalurus Furcatus) is the largest species of North Amercian catfish. The current…

A: Note- As per our policy we can answer only the first 3 sub-parts of a question. If you want…

Q: Imagine a researcher wants to determine whether parents differ from each other in their fondness for…

A: Explanation:   It is given that research asks each parent of 50 couples, It means, there are 50…

Q: State the hypotheses. H₂: All the means are equal. H₂: At least one mean is different from the…

A: The quality control department measures weekly values of different suppliers for the percentage…

Q: Most adults would erase all of their personal information online if they could. A software firm…

A:

Q: Under what conditions would it be better to use the median instead of the mean?

A: n statistics, three measures of central tendency are widely used. These three measures are also…

Q: According to a study done in 2010, the mean number of sexual partners was 7.6. However, a…

A: Statistical hypothesis testing is an important method in inferential statistics. It is used to test…

Q: Write a simple research question that can be answered with an independent samples

A: The Independent samples t-test compares the means of two independent groups in order to determine…

Q: Levi-Strauss Co manufactures clothing. The quality control department measures weekly values of…

A: Given the data of weekly values of different suppliers for the percentage difference of waste…

Q: What is the significance of the upper and lower line in the nomogram

A: The nomogram is also known as Rumack-Matthew nomogram.

Q: Explain the Formulas for a sample comparable to the ones for a population?

A: If the data includes all the possible values, then it is called population. Whereas, the sample data…

Q: Based on the boxplots and the mean/median relationship what is the shape of each data set? Explain…

A: Given:

Q: Is the Median a good way to represent the number of points scored per game for all the players?

A: Is the Median a good way to represent the number of points scored per game for all the players ?

Q: For his statistics assignment, Johnson examineddifferences in quality of grades obtained by students…

A: Johnson examined differences in quality of grades obtained by the students on regular program of a…

Q: Researchers examined the influence of a television program on children's aggressiveness. The number…

A: Since we only answer up to 3 sub-parts, I'll answer the 1st 3 sub-parts. Please resubmit the…

Q: D. Determine a data set with 7 values that has a mean of 10 and a median of 15 and a mode of 22.…

A:

Q: Explain Testing a Single Mean for significance?

A: Z-test for significance of a single mean: The z-test is appropriate when population standard…

Q: For qualitative data, the mean is the best measure of center. False

A: Qualitative data contains categorical variables. It includes values that do not have numerical…

Q: A small college takes a salary survey of last year's graduates. One of its graduates is drafted by a…

A: The appropriate measure as the salary representative is to be considered from the specified options…

Q: The selling prices in thousands of dollars for homes located on Long Beach Island in New Jersey are…

A: Given: Data on selling prices for homes on four locations of Long Beach Island in New Jersey. The…

Q: Compare the mean and the median of a data set that has a symmetrical distribution

A: Mean: The arithmetic mean (also called the mean) is the most commonly used measure of central…

Q: Pick any 10 two-digit number of your choice and calculate the mean, variance, IQR, and range of any…

A: Let the sample be  28, 21, 22, 28, 34, 26, 57, 48, 35, 31 Sample arranged in ascending order: 21,…

Q: Researchers examined the influence of a television program on children's aggressiveness. The number…

A: a. Since sample size is small and population standard deviation is unknown, t-test is appropriate in…

Q: A popular blog reports that 45% of college students log in to Instagram on a daily basis. The Dean…

A: Given  p=45%, n=203, X=106 , level of significance ɑ=0.06 Note: According to Bartleby guidelines…

Q: Consumers are becoming more aware of the fuel efficiency of their vehicles. The list shown here…

A:

Q: If you increase the sample size to 50 from 30, will the standard error of the mean be smaller or…

A: When increasing the sample size to 50 from 30, the standard error of the mean would be smaller…

Q: 4. Find the percentage of data points that lie below z = 1.46. Draw a picture to support your work.

A: The provided z-value is 1.46. The probability of data points that lie below this value can be…

Q: If the mean is lower than the median. Describe the distribution.

A: Mean is the average of the set of observations and median is middle most value of the observations.

Q: State one possible advantage of using paired samples instead of independent samples.

A: Provide the possible advantage of using paired samples instead of using independent…

Q: A researcher used the sample median as a measure of center instead of the sample mean. What do you…

A: Three central tendencies are given as: Mean Median Mode We use these measures of central…

Q: Explain about the Two Independent Samples.

A: Two samples are said to be independent if the sample values selected from one population are not…

Q: data has extreme scores, what is the best measure of average?

A: The mean is the average value of the data set. It is calculated by summing up all the observations…

Q: The entering SAT scores and high school GPA's of 100 first-year students and their grade point…

A: Given information: The investigator is specially interested to predict the college GPA for next…

Q: Which of the three measurements, mean, median, or mode, is the most influenced by an outlier value…

A: Outlier in a data set is the value which is much higher than or lower than almost all other values.…

Q: 9. Determine median from the following data: 25, 20, 15, 45, 18, 7, 10, 38, 12

A: We have to determine the median from the following data set: 25, 20, 15, 45, 18, 7, 10, 38, 12

Q: If a data set has 15 mean standard daviation 2 , percentage observation lie between 13 and 17

A: From the given information, Consider, X be the number of observation that has mean of 15 and…

Q: Determine the median and mode from the histogram.

A: X Frequency 123 26 128 13 133 11 138 9 143 2 Solution: x(1) Frequency (f)(2) d=…

Q: Cloud seeding, a process in which chemicals such as silver iodide and frozen carbon dioxide are…

A: Given, two boxplots one for cloud seeding and the other for unseeded data.