Z-Dist. vs. T-Dist. | Inferential statistics | Probability and Statistics

  Рет қаралды 4,817

Dr. Mohammad El-Ashhab

Dr. Mohammad El-Ashhab

Күн бұрын

Пікірлер: 14
@samehagamy5726
@samehagamy5726 15 күн бұрын
السلام عليكم جزاكم الله خيرا على الشرح ممكن اجابة السؤال ده لو سمحت 6. You measured the sleeping hours for a group of 50 patients after taking a placebo and for another group of 50 patients after taking a sleeping pill that is claimed to be better than placebo. The two groups are of similar age and sex (matched groups). Sleeping hours were normally distributed in both groups. To test this hypothesis, you will use: a. One-sample t-test. b. Paired-samples t-test. c. Independent-samples t-test.
@samehagamy5726
@samehagamy5726 15 күн бұрын
ممكن الحل لو سمحت
@samehagamy5726
@samehagamy5726 15 күн бұрын
6. You measured the sleeping hours for a group of 50 patients after taking a placebo and for another group of 50 patients after taking a sleeping pill that is claimed to be better than placebo. The two groups are of similar age and sex (matched groups). Sleeping hours were normally distributed in both groups. To test this hypothesis, you will use: a. One-sample t-test. b. Paired-samples t-test. c. Independent-samples t-test. ارجو حل السؤال من فضلك للأهمية
@madimohamed
@madimohamed 2 жыл бұрын
في الحالة الاخيرة هل قصدك الالتجاء الى التحليل الابرامتري من امثال مات ويتني او ويلكوكسون او...؟ بارك الله استاذنا وجزاك الله عنا خير الجزاء
@alashhab
@alashhab 2 жыл бұрын
أقصد انه يسأل أحد المختصين أمثال سعادتك
@madimohamed
@madimohamed 2 жыл бұрын
بارك الله فيك أستاذنا.
@hassanah253
@hassanah253 Жыл бұрын
دكتور كيف نعرف بانه not normal
@alashhab
@alashhab Жыл бұрын
Normality test
@mustafaalabohasne5509
@mustafaalabohasne5509 Жыл бұрын
بالفيدو السابق قلت اذا غير نورمال واكبر من 30 نستخدم Z اما بهاد الفيديو قلت نستخدم t ?
@alashhab
@alashhab Жыл бұрын
في حالة حجم عينة أكبر من ٣٠ ينطبق ال z و t ولكن معظم البرامج مثل ال excel تستخدم t لذلك لو دخلت جداول ال t تجد قيمتها بعد ٣٠ تتطابق تقريبًا مع قيمة z
@mustafaalabohasne5509
@mustafaalabohasne5509 Жыл бұрын
@@alashhab مشكور استاذي
@alashhab
@alashhab Жыл бұрын
@@mustafaalabohasne5509 العفو الله يوفقك
@semawashere3637
@semawashere3637 Жыл бұрын
شنو هو التوزيع الطبيعي
@alashhab
@alashhab Жыл бұрын
Z
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У вас там какие таланты ?😂
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