Math Answers

According to one survey in India, 75% of Instagram users love REELS. Suppose that 25 Instagram users (randomly selected) have been approached in the university located in vile Parle. They have been asked about their status of like/ dislike the Instagram- REELS.

a) What is the probability that exactly 15 of them would agree with the claim ( or said they love Insta-REELS) ?

b) What is the probability that Exactly 20 of them would agree with the claim (or said they love Insta-REELS) ?

if the p - value is 0.0340 how can we use it in making a decision.

Three airlines serve a Srinagar. Airline 'Amira' has 50% of all the scheduled flights, airline 'Biyas' has 30% and airline 'chinar' has the remaining 20%. Their on-time rates are 80%, 65%, and 40%, respectively.

Part 1) Draw the Probability tree diagram.

How many different samples of size n = 3 can be selected from a population with the following sizes?

1.) N = 4

2.) N = 8

3.) N = 20

4.) N = 50

State whether the following statement are true or false and also give the reason im support your answer

(1)As we increase the sample size, representativeness of the population by the sample decrease

(2)In a big hall there are 50 rows and each row has 60 students. A research scholar selects 10 rows randomly and then randomly selects 15; students from each selected row. It is an example of cluster sampling procedure.

In a population of adults ages 18 to 65, BMI (body mass index) is normally distributed with a mean of 27 and a standard deviation of 5.

a. What is the BMI score for which half of the population has a lower value?

b. What BMI marks the bottom 25% of the distribution for this population?

c. What BMI marks the bottom 5% of the distribution for this population?

d. What BMI value marks the upper 10% of the distribution for this population?

e. What BMI value marks the upper 30% of the distribution for this population?

$500 is deposited in an account which bears 12% p.a. interest compounded monthly. How many years it would take to accumulate $500 to $806.11

A roulette wheel in an amusement park has the numbers 1 through 60. If you bet ₱100.00 you will

have a chance to win a cellular phone worth 5,000.00. How much the organizer will earn if 100 games

will be played?

Solve the initial value problem.

y′′+y=1, y(0)=2, y′(0)=7.

Suppose two coins are tossed. Let B be the random variable representing the number of heads that occur find the probability of getting single head.