Other factors arc fixed If sample size gets large then pvalu

Other factors arc fixed. If sample size gets large, then p-value becomes sm of confidence interval decreases as confidence level increases. Identify which of the following are valid statements. Circle T or F. T F For any event A and B we can say, P(A U B) = P(A) + T F Expected value of a Normal random variable is sigma^2. T F Histograms are commonly used for categorical data. T F Binomial random variable is discrete. T F lype I error is can be controlled by the significance level. T F Sampling distribution for sample mean is always bell shaped T F Confidence interval can be used to do a hypothesis test. T F Standard error is an estimate of standard deviation of a sampling dis

Solution

(b)Width of the confidence interval decreases as confidence level increases. TRUE.

(c)For any event A and B we can say, P(A union B)=P(A)+P(B). False.

(d)The expected value of a normal distribution is ^2. FALSE.

(f)Binomial random variable is discrete. TRUE.

(h)Sampling distribution of sample mean is always bell shaped. TRUE.

(i)Standard error is an estimate of standard deviation of a sampling distribution. TRUE.