The average age of a class of 25 students is 10 years and the average age of another class of 30 students is 15 years. Find the average ages of students of the two classes.

Q: In a math class, one of your 4 test scores is dropped. On the first three tests, you have the…

A: In a math class, one of your 4 test scores is dropped.  On the first three tests, you have the…

Q: In a​ company, 95​% of the workers are women. If 115 people work for the company who​ aren't women​,…

A: Let the total no.of workers are X. Given, 115 people aren't women . Then ,no of women workers=X-115

Q: robert may select a desktop from a geoup of seven, and laptop from a group of 5. how many stats ways…

A: given data, robert may select a desktop from a geoup of seven, and laptop from a group of 5.we have…

Q: The Goal Line Gals has 35 members and the Baseball Babes has 28 members. At a joint meeting all…

A: Let's denote the set of members in the Goal Line Gals as G and the set of members in the Baseball…

Q: MK Family Orchard has 120 apple trees and 90 pear trees. If each fruit tree produces an average of…

A: Given : The MK Family Orchard has 120 apple trees and 90 pear trees.   each fruit tree produces an…

Q: man gives his dog one type of medication every 9 ​days, and a second type of medication every 6

A: First type of medication given to the dog for every 9 days . Second type of Medication given to the…

Q: This year, I am the adviser of a 42-member local chapter of the National Mathematics Honor Society.…

A: topic - permutation and combinatation

Q: Two groups are running a race. The first group is made up of 6 students and the second group is made…

A: group 1 n1 = 6x1= 521.4 secondsgroup 2n2 = 8x2 = 502.6 secondsfinal average = ?

Q: A total of 328 men and women attended a carnival. After 2/3 of the men and 1/2 of the women left the…

A:

Q: A television ad for gelato is seem by 22% of the population. Of those who see the ad, 14% then buy…

A: A television ad for gelato is seem by 22% of the population. Of those who see the ad, 14% then buy…

Q: There is a factory that makes widgets in different colors. The production time for each color is…

A: Given: Here are the given story's summary, The factory in question makes widgets in two colors -…

Q: Two groups are running a race. The first group is made up of 6 students and the second group is made…

A: group 1 n1 = 6x1 = 521.4group 2n2 = 8x2 = 502.6find average (x) = ?

Q: A museum opens with a collection of 250 items. During the first week after the opening, an…

A:

Q: A student is buying single-serve breakfast meals for the next 10 days. The options are meat bowl,…

A:

Q: Nick and his team collected tanned and released 27 deer several days later the teams return to the…

A: Let 'x' be the total population of deer. Now from given data we form equations in ratio form. ratio…

Q: 50% of the students in a school were boys. 20% of the boys and 2/3 as many girls as boys took part…

A: As 50% are boys in the school so left 50% is girls which imply number of boys and number of girls…

Q: ass, one of your 4 test scores is dropped. On the first three tests, you have the following scores:…

A: The formula for the mean of a sample is, The sample size (n) is 4. The sample mean is x is 75.…

Q: John has grades of 86, 88, and 78 on his first three tests in geometry. If he wants an average of at…

A:

Q: A large university accepts 50​% of the students who apply. Of the students the university​ accepts,…

A:

Q: Andrew and Ryan shared some chocolates. Andrew gave away 1/4 of his chocolates. 1/4 of the given…

A: Step1:  Let At first  Andrew  and Ryan have x and y chocloatesNow, ⇒When Andrew  gave away 14  of…

Q: John has grades of 87 and 93 on his first two history tests. What must he score on his third test so…

A:

Inverse Normal Distribution

The method used for finding the corresponding z-critical value in a normal distribution using the known probability is said to be an inverse normal distribution. The inverse normal distribution is a continuous probability distribution with a family of two parameters.

Mean, Median, Mode

It is a descriptive summary of a data set. It can be defined by using some of the measures. The central tendencies do not provide information regarding individual data from the dataset. However, they give a summary of the data set. The central tendency or measure of central tendency is a central or typical value for a probability distribution.

Z-Scores

A z-score is a unit of measurement used in statistics to describe the position of a raw score in terms of its distance from the mean, measured with reference to standard deviation from the mean. Z-scores are useful in statistics because they allow comparison between two scores that belong to different normal distributions.