12. Bart aims to estimate the mean value of body weight in Springfield citizens. He asks 30 citizens of Springfield about their body weight and gets a mean value of 75 kg with a standard deviation of 15 kg. Please calculate the confidence interval on the 95% level for the estimated true population mean

Q: 2. Matt Tress found 46 cents under his bed. He had less than 11 coins and one of the coins was a…

A: We will solve the problem

Q: In the recent PIIE webinar attended by 100 people, there are 30 Filipino women and 23 Filipino men.…

A:

Q: A doctor office there are only 10 chairs and 15 people waiting. In how many wayscan they be seated?

A: There are 15 people and 10 chairs.  The first chair can be filled in 15 ways.  The second chair can…

Q: My teacher says we have to round up so the lower class limit would be 20 instead of 17?

A: The above data set,  17,26,19,19,18,21,21,30,19,18,20,22,18,19,18,22,19,23,19,20,20,25,18,20,22,19…

Q: For the grooms men, we had outfits picked out. We had 3 different dress shirts, 3 different styles…

A: Multiplication rule of counting:If a task consists of a sequence of choices in which there are ‘a’…

Q: There are 40 pieces of candy in Josh's bag. If - of the 8 candy are bags of M & M's, how many bags…

A: Given there are 40 pieces of candy in Josh's bag. 18 of the candy are bags of M & M's. We have…

Q: There are 23 different toy action figures in a toy box. How many possible ways are there for Justin…

A: Solution: Combinations: Suppose there are n objects and r objects to be chosen. Then, combination…

Q: 66,67,34,45,64,67,75,58,54,59,67. Find the mode(s) of the given scores.

A: It is given that the scores of students are66,67,34,45,64,67,75,58,54,59,67

Q: wo pizzas are the same size. One is cut into 6 pieces and the other is cut into 8 pieces. If you…

A: We know that if when the denominator increases and the numerator remain same, the fraction as a…

Q: why did you use 1,2,3,4 in the answer when the lengths are 4,3,6,8 ?    thankyou

A:

Q: It's only one question but it has 3 parts. Here I spend one more question can you please do the…

A:

Q: In a math class, you have 4 tests. On the first three tests, you have the following scores: 90, 90,…

A: Given Total no. of tests, n=4 Scores on the 1st 3 tests were 90, 90 and 90 Average, x¯=90

Q: There were 3-wheel ATV’s and 4-wheel ATV’s at the fall of road exhibition. Justin counted a total of…

A: Make linear equations in two variables accordingly to the question.

Q: To get a B in math, Alexandria Pappas must average 80 on five tests. Scores on the first four tests…

A:

Q: did you come up with 30 as the first number of the classes and 54 as the last number of the classes?

A: Concept: Creating interval for data points is a process is which we create interval that are easy to…

Q: My options are 1,2,3,4,5,6,7,8,9. What should i Put?

A:

Q: An error that occurs because of chance is called: nonsampling error. O sampling error. O probability…

A: An error that occurs because of chance is called as....

Q: Bella is a really cute dog that lives near our school. Bella's mom is in Class 72. Bella's mom…

A:

Q: Amy, Brenda, Charles and Darren are playing treasure hunt in the garden numbered from 1 to 100…

A: Given: The total number of boxes is 100, which is numbered from 1 to 100 placed at different…

Q: Mr. Jordan is traveling to Helsinki Finland with his Gibson Les Paul guitar for a competition during…

A: To find: How many different ways can he travel from Toronto to Helsinki.

Q: Following the guidelines of the Food and Drug Administration, Dale tries to eat at least 5 servings…

A: Recall: Mean/Average   A=x1+x2+...+xnn

Q: A California license plate has 1​ digit followed by 3​ letters followed by 3​ more digits. How many…

A: No.of digits from 0 to 9=10No.of letters from A to Z=26

Q: Jun and his sister visited Texas state Aquarium in Corpus Christi. Well there, they learned that one…

A: Given, 1 catfish produces 40 eggs This means, Number of eggs by 1 cat fish = 40

Q: What's the answer to letter "B".  Be more specific please.

A:

Q: Marvin is making an ice cream sundae. He has ten options for ice cream, 20 options for dry toppings,…

A:

Q: For a fishing trip, Yolanda is going to choose lures to put in her tackle box. She has 7 lures that…

A: It is given that 7 lures that are buzzbaits and 8 that are spinnerbaits.

Q: the high temperatures for the first five days in december were as follows 28 degrees, 3 degrees,…

A: The high temperatures for the first five days in December were as follows: 28 degrees, 3 degrees,…

Q: Julian is arranging 162 chairs for a concert. He places the chairs in rows, with the same number of…

A: Given that, there is a total of 162 chairs. The chairs are being placed in rows, with the same…

Q: my bag I have 2 dimes, 2 nickles and 1 penny. I got to the candy shop and randomly pick two coins…

A:

Q: Kevin was having so much fun making cupcakes for his class. He made 3 1/4 dozen of them! But there…

A: 1 dozen = 12 piece

Q: The jazz band at city college has 33 students, and the traveling band has 42 students. Right…

A: It is given that Jazz Band at has 33 students, and the Traveling Band has 42 students.

Q: n step two, where did you get the 11? I got the twelve, but I don't have the 11.

A: x f fx fx2 210 3 630 132300 370 4 1480 547600 530 3 1590 842700 740 1 740 547600 1140 1…

Q: Example 1: Find the probability of drawing 2 red balls in succession from a bag containing 4 red and…

A: