A statistician wishes to determine the difference between two population means. A sample of 10 items from Population #1 yields a mean of 185 with a standard deviation of 20. The sample of 12 items from Population #2 yields a mean of 200 with a standard deviation of 25. If you can assume that the population variances are equal, what is the pooled variance? Answer: The pooled variance is

Q: Loyd finds 8 shirts in his size at a clearance sale. How many difference purchases could Loyd make?…

A: We know that: n! = nx (n-1) x (n-2) x (n-3) ........x 2 x 1 nCr = n! / r! (n-r)!

Q: An appetizer platter has a selection of 88 different appetizers. Mario plans to choose 3.3. How…

A: Number  of different appetizers = 88Mario plans to choose = 3

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A: We have given that Number of multiple choice questions = 6 Each question has number of possible…

Q: ow many answers would we expect the student to get correct just by guessing?

A: here given there are total 75 question  n =  75

Q: When taking a 20 question multiple choice test, where each question has 5 possible answers, it would…

A: We have n = number of multiple choice questions = 20 p = probability of question correct = 0.20 So…

Q: When taking a 20 question multiple choice test, where each question has 3 possible answers, it would…

A: We have to find that event is usual or unusual.....

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A: To solve this problem  (1) we find the number of ways to solve the true false questions . (2) we…

Q: How did you get the 38,37, and 26?

A: No.of red balls = 3 No.of green balls =3 No.of blue balls =2 Total no.of balls = 8 (i.e. 3+3+2)…

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A: Given, Elizabeth's tablet has a combined total of 20 apps and movies. Let xrepresent the number of…

Q: cost

A:

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A: Here given : 16 multiple choice test where each question has 3 possible answers. It would be unusual…

Q: There are 21 juniors and 29 seniors trying out for the basketball team. You need 14 students for the…

A:

Q: Aponi, Kosumi, and Caden are each entitled to a portion of the winnings from Lotto649 according to…

A: total winning prize=$27000Total ticket purchased=10+1+2=13ticket purchased by Aponi's =10ticket…

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: Jonathan likes to randomly mix-and-match the colors of the shirts and pants he wears to school. His…

A: The objective of this question is to find the total number of possible combinations of shirt and…

Q: A study found that the average home price for 14 houses in one community was $285,000. Two more…

A:

Q: When taking a 18 question multiple choice test, where each question has 5 possible answers, it would…

A: We have to find unusual number of success.

Q: A political scientist has 12 volunteers for a political opinion survey. And political scientist Alex…

A: GivenNo.of volunteers(n)=12No.of volunteers to complete different variations of the survey(r)=2

Q: The college hiking club is having a fundraiser to buy new equipment for fall and winter outings. The…

A: Given Information :  The college hiking club is having a fundraiser to buy new equipment for fall…

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

A:

Q: Decide if the differential equations whose slope fields are shown below involve only x, only y, both…

A: To Find: Decide if the differential equations whose fields are shown above involves only x, only…

Q: There are 4 white, 2 pink, and 2 blue marbles in a hat. You pick 2 marbles from the hat. Marbles are…

A: There are 4 white, 2 pink, and 2 blue marbles in the hat.

Q: There are six nickels and five dimes in your pocket. You randomly pick a coin out of your pocket and…

A: Total coin=6+5=11 Nickels=6, dimes=5

Q: Joey finds 13 video games that he would like to have. Three of them will run on his operating system…

A: Given: A total of 13 games are there. 10 will run on the operating system and 3 will not.

Q: Based on a grade 11 math student, answer the following question: What are the second differences for…

A: The objective of this question is to calculate the second differences of a given table of values.…

Q: You are taking a quiz that has 9 multiple-choice questions. If each question has 6 possible answers,…

A:

Q: The college hiking club is having a fund raiser to buy new equipment for fall and winter outings.…

A: We have given that  The club sold 571 cookies before the drawing.

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A: The problem is asking us to find out how many baseball cards each person received when Mike divided…

Q: After a service call by a plumber, the company follows up with a survey to rate the service and…

A: For yes/ no type questions:

Q: for lunch you can choose between a super salad one of the four main courses for dinner and then…

A: Combination :-