Arandom sample of 157 recent donations at a certain blood bank reveals that 86 were type a blood. does this suggest that the actual percentage of type a donations differs from 40%, the percentage of the population having type a blood? carry out a test of the appropriate hypotheses using a significance level of 0.01. state the appropriate null and alternative hypotheses.

Yes, this suggest that the actual percentage of type A donations differs from 40%, the percentage of the population having type A blood.

Step-by-step explanation:

Since we have given n = 157

x = 86

So,

and we have p = 0.4

So, hypothesis would be

Since there is 1% level of significance.

So, test statistic value would be

and the critical value at 1% level of significance , z = 2.58

Since 2.58<3.846.

So, we reject the null hypothesis.

Hence, Yes, this suggest that the actual percentage of type A donations differs from 40%, the percentage of the population having type A blood.

answer: option a.

step-by-step explanation:

you know that the quadrilateral opqr ( a four sided figure) is inscribed in circle. this means that all its vertices are on the circle.

then, by definition, the opposite angles of the quadrilateral are supplementary, this means that the sum of their measures is 180 degrees.

you can observe in the figure that the angles ∠opq   and the angle ∠orq   are opposite, therefore:

then, can be used to d to calculate the measure of ∠opq