sudhakarkanikapuram13

Suppose that the probability of being tutored in Statistics is 0.55, while the probability of being tutored in Physics is 0.32, and the probability of being tutored in both Statistic and Physics is 0.09.

(a) What is the probability of being tutored in Statistics or Physics?

(b) What is the probability of not being tutored in Statistics nor Physics?

(c) Are the events “being tutored in Statistics” and “being tutored in Physics” mutually exclusive?

Explain.

In an opinion poll, 25% of a random sample of 200 people said that they were strongly opposed to having a state lottery.  The standard error of the sample proportion is approximately

A. 0.03

B. 0.25

C. 0.0094

D. 6.12

The graph represents the distribution of data. what is the mean of the data?

Here is a histogram of a data distribution. All class widths are 1.

What is the median of this distribution?

(A) 6

(B) 7

(C) 8

(D) 5

The correlation coefficient may assume any value between what range?

The correlation coefficient, r is a number between

0 and 1

0 and 100

0 and 10

-10 and 10

-1 and 1

a _________ is a subset of a population, containing the individuals that are actually observed.

Consider the following discrete probability distribution. What is the probability that x equals 7?

Which of the following would be an appropriate alternative hypothesis?

A. μ ≤ 15.6

B. σ ≠ 1.6

C. π = 0.5

D. both A and B are appropriate

Which of the following would be an appropriate null hypothesis?
A. The mean of a population is equal to 55.
B. The mean of a sample is equal to 55.
C. The mean of a population is greater than 55.
D. Only (a) and (c) are true.

A hypothesis will be used to test that a population mean equals 10 against the alternative that the population mean is less than 10 with known variance  σ . What is the critical value for the test statistic  Z 0 for the significance level of 0.050? Round your answer to two decimal places.

Philip is reading a book that is 40 pages long. He read 3/5 of the book on Wednesday and 3/4 of the remainder on Friday. How many pages did Philip have left to read?

A library has 160 books. 3/8 are story books, 1/4 are poetry books and the remainder are books. What fraction is comic books?

The fifth grade class surveyed 144 people. They found that 1/3 of the people have umbrellas. Of the people who have umbrellas, 1/2 have black umbrellas. How many people in the survey group have black umbrellas. 

What is a qualitative and a quantitative variable?

How many minutes are there in three and a half hours?

If a normal distribution has a mean of 50 and a standard deviation of 10, what is P(x<40)?

If you roll a die, what is the probability of rolling a number greater than 4?

 What is the correct quotient of 9,648 and 48?

For a two-sided z-test, the test statistic is equal to 1.62. What is the p-value for this test equal to?

A die is rolled, find the probability that an even number is obtained.

A normal distribution has a mean of 0.40 and standard deviation of 0.028. What percentage
of observations will lie between 0.372 and 0.428?

What is the value of the t score for a 95% confidence interval if we take a sample of size 5?

A) 2.776

B) 1.960

C) 2.571

D) 2.447

What is the value of Sum(X-1) of the following scores? 2, 4, 7

What is this called which fraction 

1/2,1/5,1/3

Explain step by Step