Please explain Q14
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Hi,
They have already defined the alternate and null,
By looking at the Alternate hypothesis, we get to know that it’s a right tailed test.
Right tailed test at 5% level of significance gives z critical = 1.64 (the shaded right tail)
Now compare it with the given z statistic= 1.68
As the z statistic falls into the tail, i.e. the rejection region, we reject the null.
Hence Option A is correct.
Hope it helps!