Question

Question 3 (1 point) Hypothesis Test. Are young men more likely to experience ADD/ADHD symptoms than young women? A recent survey found 22 of 78 females had experienced ADD/ADHD symptoms while 12 of 40 males had experienced them. Test at the 1 level. Question: These data pass are appropriate for Z-procedures, e.g. have enough successes and enough failures in both samples. True False Question 4 (1 point) Hypothesis Test. Are young men more likely to experience ADD/ADHD symptoms than young women? A recent survey found 22 of 78 females had experienced ADD/ADHD symptoms while 12 of 40 males had experienced them. Test at the 1 level. Question: What is the correct statistical conclusion? Reject the null hypothesis. Reject the alternative hypothesis. Accept the null hypothesis. Accept the alternative hypothesis. None of these

Answer 1

Let x1 and x2 be the number of women and men respectively experience ADD/ADHD. Here x1= 22 and x2=12.

Let n1 and n2 be the sample size of women and men experience ADD/ADHD respectively.

Question 3 : True

perience Bi be the sample proportion of women ex ADD | ADHD Let he be the ADD/ADHD, P = 12 Let bi and pa be the population proportion of let a 22 78 sample proportion of 40 = 0.3 , na = 40 (sample size) 1 0.282 .n,= 78 (sample size men experience women and The men res peetively experience ADD/ADHD Hypotheses, bg = 1 ł Ho: Po-P1 = 0 vs. Hi q> 1 & Hi: Po-PA 70 Ho! Now, the test statistic z=(- (1) - (Pq - P₂) + (1-6) ( h ) ander Ho, z = (1-P) Ê (1-Å) ( h + 1/52) where i = X+X2 nitha 22+12 78 +40 = 0.288 0 - (0.3 - 0.282) 0.288 (1-0.288) (+8+4) = 0.204 Now, from z table we get the value at 0.1 level of significance, z* = 1.645 when Z value is greater that * = 1.645 we reject the mall hypothesis otherwise we accept it. Here z = 0.204 the nell hypothesis Lz* = 1.645, we accept 0.1 Ho: b 2 = bi ? Ho: p2-81=0

Question 4: Accept the null hypothesis.