 # College Statistics & Probability Questions and Answers

Recent questions in College Statistics Thomas Hubbard 2022-05-24 Answered

### What is the mean, median, and mode of 1, 4, 5, 6, 10, 25? Cara Duke 2022-05-24 Answered

### What is the mean of 58, 76, 40, 35, 46, 45, 0, and 100? skottyrottenmf 2022-05-24 Answered

### Why are measures of central tendency essential to descriptive statistics? patzeriap0 2022-05-24 Answered

### The mean length of 6 rods is 44.2 cm. The mean length of 5 of them is 46 cm. How long is the sixth rod? Wayne Steele 2022-05-23 Answered

### How do you find the range of 4, 6, 3, 4, 5, 4, 7, 3? Isabela Sherman 2022-05-23 Answered

### How do you find the median of 37, 54, 50, 29, 34, 41? Max Cariño 2022-05-23

### Use the table for z or t-distribution to determine the value of z or t to construct a confidence interval for a population mean for each of the following combinations of confidence and sample size: Confidence interval 90% n=37 Mackenzie Rios 2022-05-22 Answered

### Type of Distribution for Survey Answers 1 to 10Investigating survey data where participants are asked to answer based on a scale of 1 to 10typically, the average is around 8.5 with most responses between 7-10, with a lower numbers like 3 scattered aroundwhat is the best way to describe the distribution since it's skewed? Monserrat Sawyer 2022-05-22 Answered

### Psychologists who study perceptual/motor tasks often refer to something called the “Speed/Accuracy Tradeoff” or SAT. In many human responses we can respond very quickly and sacrifice response accuracy, or we can respond with precision and accuracy and sacrifice speed. Sports psychologists have found that both novice and skilled golfers demonstrate a SAT in various aspects of the game. Ask any golfer about driving the ball and on top of getting a discussion about club head speed and fairways hit, you’ll likely hear some version of the old saying “there’s a lot of big hitters in the woods.” Hitting it long is great, but lots of long hitters wind up way off line. Some of these big hitters are well known because they’ve won, but lots of the names on the list of the top 25 drivers of the golf ball are unknowns—they can drive the ball a country mile, but they don’t win the big tournaments, perhaps because they have to hit their second shot from the deep woods.Suppose we select a random sample of 30 golfers and measure both the distance they can drive the ball (a variable related to speed, in particular to club head speed at the point of impact with the ball) and average accuracy (measured as the ratio of fairways hit divided by total number of attempts). Is there a relationship between speed at impact and accuracy?What test should you use and why? groupweird40 2022-05-22 Answered

### How one derives significance test for pearsons correlation coefficient?I am exploring statistics and probability. What upsets me, only ready to use algorithms are present in the books. But no example how one derives a significance test, where from the test statistics come from etc. At the moment I am interesten in Pearsons coefficient significance test, but really derivation of any popular test will be helpful for me. Case Nixon 2022-05-22 Answered

### ${X}_{1}...{X}_{n}$ ~ Bernoulli(p) independent. I also have the following test hypothesis: ${H}_{0}:p={p}_{0}$ and ${H}_{1}:p>{p}_{0}$. I define my test as follows:$T:$ I refuse ${H}_{0}$ in favour of ${P}_{1}$ if the number of successes is very high.Now suppose ${p}_{0}=0.6$ and $n=20$, we find that we have 18 successes.Find the p-value of the test.Now this is what I have done:$p-value=\mathbb{P}\left(\sum {x}_{i}\ge 18\right)$$=0.0005240494$ However confronting it with the command:$\mathtt{b}\mathtt{i}\mathtt{n}\mathtt{o}\mathtt{m}\mathtt{.}\mathtt{t}\mathtt{e}\mathtt{s}\mathtt{t}\mathtt{\left(}\mathtt{18}\mathtt{,}\mathtt{20}\mathtt{,}\mathtt{p}\mathtt{=}\mathtt{.6}\mathtt{,}\mathtt{a}\mathtt{l}\mathtt{t}\mathtt{e}\mathtt{r}\mathtt{n}\mathtt{a}\mathtt{t}\mathtt{i}\mathtt{v}\mathtt{e}\mathtt{=}\mathtt{g}\mathtt{r}\mathtt{e}\mathtt{a}\mathtt{t}\mathtt{e}\mathtt{r}\mathtt{\right)}$It is not right (by a factor of 10). My problem is that I am not able to correctly asses what the "number of succession is very high". How do I work around this? infogus88 2022-05-21 Answered

### The test statistic is z = 2.75, the critical value is z = 2.326. The probability value is_________.Select one:a. not measurableb. greater than the significant levelc. equal to the significant leveld. less than the significant level Isaiah Farrell 2022-05-21 Answered

### What happens to the mean, median and mode for the data 14, 15, 22, 15, 2, 16, 17, and 13 if the outlier is eliminated? velitshh 2022-05-21 Answered

### A new cream that advertises 52% of women over the age of 50 will experience skin improvement from using their product. A study was conducted in which a sample of 170 women over the age of 50 used the new cream for 6 months. Of those 170 women, 76 of them reported skin improvement (as judged by a dermatologist). Is this evidence that the cream will improve the skin of less than 52 % of women over the age of 50? Perform a hypothesis test using the 0.05 level of significance.Set up a null and alternate hypothesis. Hayley Sanders 2022-05-20 Answered

### For the data set 6, 34, 12, and 14, what is the range? Scolfaro2y 2022-05-20 Answered

### Mean vs. Median: When to Use?I know the difference between the mean and the median.- The mean of a set of numbers is the sum of all the numbers divided by the cardinality.- The median of a set of numbers is the middle number, when the set is organized in ascending or descending order (and, when the set has an even cardinality, the mean of the middle two numbers).It seems to me that they're often used interchangeably, both to give a sense of what's going on in same data.Do they mean (pun intended) different things? When should one be used over the other? vestpn 2022-05-19 Answered

2022-05-15

### If I have the following Hypothese:H1: Women tend to watch romantic films more than men Apparently it's a chi-square because I'm measuring relationships between expected frequency and Observed frequency and also because Gender is on the nominal level. But what if this is designed for a survey in which questions are on the nominal, Ordinal and interval level (Likert scale - differential sementic) will the outcome still be a Chi-square? Alaina Holt 2022-05-14 Answered

### What is the mean, median, mode, and range of 7.6, 7.6, 6.1, 6, 14.3? hisyhauttaq84w 2022-05-14 Answered

### The value $\alpha$ that represents the probability of type I error is often referred to as the __________________________ of the test.The vertical deviationsy1-y^1,y2-y^2,...,yn-y^nfrom the estimated regression line are referred t as the________.$\text{The vertical deviations}{y}_{1}-{\stackrel{^}{y}}_{1},{y}_{2}-{\stackrel{^}{y}}_{2},...,{y}_{n}-{\stackrel{^}{y}}_{n}\text{from the estimated regression line are referred t as the________.}$$\text{When the estimated regression line is obtained via the principle of least squares, the sum of the residuals}y;-\stackrel{^}{y};\left(i=1,2,3,...,n\right)\text{should in theory be}$

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