You perform 7000 significance tests using a significance level of 3%. assuming that the null hypothesis is true, how many of the test results would you expect to be statistically significant?

210

Step-by-step explanation:

we have given significance level α=3% =0.03

level of significance is nothing but the chances of rejecting a null hypothesis by the test when it given that it is correct. it is denoted by α it also defined as the

level of significance =1 - confidence level

now statistically significant test =0.03×7000=210

so the expected value of statistical significant is 210

75 tickets have been sold so far.

step-by-step explanation:

in this question it is clearly mentioned that 45 children's tickets have been sold and this number is 60% of the total tickets sold.

now let's assume the total number of tickets sold be x.

then 60% of x = 45

⇒

⇒ x(.6) = 45

by dividing with .6 on both the sides of the equation

⇒ x = 75

therefore 75 tickets have been sold so far.

all it means is function 3