Please just state True or False. A parameter is a numerical fact about a sample.

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Please just state True or False. A parameter is a numerical fact about a sample. The arithmetic mean for a sample is denoted by mu You calculated Z value as 1.66 and the critical value is 1.68. Thus you should reject the null hypothesis and accept the alternative hypothesis. When covariance of X and Y is zero, their coefficient of correlation equals to 0.4 In Statistics sigma denotes sample deviation and s denotes population standard deviation. The union of A and B can be written as P(A U B) = P(A) + P(B) + P(A) Intersection P(B). Two events A and B are said to be independent if and only if P(A|B) = P(A). You draw a sample of 100 from a population of 6000 subjects in a health study. With a simple random sample (drawn without replacement), the expected value of the percentage of males in the sample equals the male percentage in the population. The central limit theorem suggests that the larger the sample size, the more closely the sampling distribution of X will resemble a normal distribution. Z-test says how many variances away an observed value is from its expected value or population mean. A test statistic is computed from sample data in hypothesis testing and is used in making a decision about whether or not to reject the null hypothesis. When we accept the null hypothesis, it means that we cannot reject the alternative hypothesis. You consider purchasing a lottery ticket. If you win you will receive $120,000 and 40,000 lottery tickets are sold. Every ticket has equal chance of winning. Based on this information the expected value of the lottery ticket is $2 $3 $1 $5 $0.5

Explanation / Answer

A-False

B-False

C-False

D-False

E-False

F-False

G-True

H-True

I-False

J-False

K-True

L-False

Q-1-Exepcted value=(120000-40000)*(1/2) +(-40000)*(1/2)=20,000

So Expected value =$2

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