XčA�!�M�ућ��{�nj��2�dx�������,. A scale measuring subjective well-being was administered to a random sample of 150 college students. <>/ExtGState<>/ProcSet[/PDF/Text/ImageB/ImageC/ImageI] >>/MediaBox[ 0 0 612 792] /Contents 4 0 R/Group<>/Tabs/S/StructParents 0>> The lifetimes (in months) of ten randomly selected automobile batteries of a particular brand are: 22 17 20 21 17 23 The manufacturer claims, however, that this particular make of battery has an 18 month lifetime. endstream endobj 30 0 obj <> endobj 31 0 obj <> endobj 32 0 obj <>stream endstream endobj 38 0 obj <>stream 1 – ANSWER KEY School of Music A. 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Worksheet 3: Confidence Intervals Practice Exercises: Answers 1. There were 20 successes and 206 failures. Find a 95% confidence interval for the population mean . ���QɊ t�b�d�|�Yr���P�k���T��:8{�ܫ��������ě�F 5�Qi! h�T��n� �w���F�I�v�X��V�۝��E����/P+Q8��q?��[�l�A^wa���~!�p��:��㖕[O* Op���� ����T�#����/���;$�ƤW��E�@J080~8�pV/�]�׀ J^o���9(��܈�TU]�^%�3��L�Q�A�(b�nq�l�R�?K�ح+��xs��d����ʆ��ۦ�yv>�W� m5 1. The mean and standard deviation for the sample are 110 mg and 5.0 mg, respectively. <> Find a 95% confidence interval for the unknown population mean. h�b```f``�g`e`��gd@ A�Nj�[UM��0��G �Co8�Eyn�H`3h��h�5uL��8#0��l!�0``R2�耱]�2�l��@����� H+ � h�T�=o�0�w~ō�:`�6b(Y2�CM���G�T�eȐ_sGu ��{�Λ�n����8�����E��s�-�zR����Z��� �'��2�8�}7BUe�G���x���Q?�{�ߢ���S"Z}~%r8�����58첼y1��9 o�x �l��N�X�Ɵ*!DQ/G�k@���g�Umg�M̒��]�j�,Yz[gI�z��O�1n9��#� �����f�2���aG����c�-�1%˥c�rU��=uA�Xᘚ�)6���b�f0K��[�\g)"�p��`{�o��l�Q�l��/��A{�1-���pY^������=-_�+� ��� Do you believe the manufacturers claim? Use the GSS survey data to find the average number of siblings for people in the US in 1996 with reasonable accuracy. Use StatCrunch to find a 90%, 95%, and 99% confidence interval for the number of children (childs) in our GSS survey. 4. The sample was random and consisted of less that 10% of the population of students. 6. 63 0 obj <>/Filter/FlateDecode/ID[<361E5F38D442F2558EBDBB985C58A868>]/Index[29 62]/Info 28 0 R/Length 143/Prev 134006/Root 30 0 R/Size 91/Type/XRef/W[1 3 1]>>stream Confidence Interval Practice Worksheets October 21, 2019 October 22, 2019 Some of the worksheets below are Confidence Interval Practice Worksheets, definition of confidence intervals with formula, exercises with R hypothesis tests and confidence intervals, several examples and exercises involving real life problems with solutions. Standard Deviation: 3.52. 2. Fundamentals Review Belmont University Intervals Worksheet No. endstream endobj 35 0 obj <>stream 5. 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After surveying a random sample of students at Dartmouth College, a campus organization calculated that a 95% confidence interval for … Note: Using StatCrunch we found that the descriptive statistics for the variable ‘sibs’ is as follows: N 2897 Mean: 3.86 Standard Deviation: 3.52 2. %%EOF ����9�[��m�q2��黳}ں��h8k��cN_�5%�P�B�[gh$�k���y,����h &Z[�>���3�'U�%��_Pk!���b�/R�Γh�� �@(�ٽ"A�� ����Ky��0���?r^��28Mf�5�s�P�� ��d-��5|����J��{z����U���i���ь-�E�g�3�K�q�X8�4�2N�Z��\�:*����sE3�j|ʱUݕWn:�&���ڐd�@X熹 �]�/�B�l��z�$- � Ԣˊ�L��(�Oa'P`'���vc�b���(>�����h���,�����F��^r��e��E��������z�k��p?�y���0 T$! ��A���>�U�h4���%�6?2���a�y��u\!�ne���O3��+�;�&���rc%ؒ&91U���@%:�}�#Vq$i�a�Cc��3���x.�E�lG�?���OW|���X�_��D+����d��ܸO[p��^`pn���y7��.�����K��o� 87/�e���z�-q�`aV\��o�uTw�ο����΋�5� ���� ��h��p The caffeine content of a random sample of 81 cups of black coffee dispensed by a new machine is measured. è è B B B B B ÿÿÿÿ V V V V b V ¹ ø ~ ~ ~ ~ ~ Y Y Y 8 : : : : : : $ ± ² c"   ^ B ’ Y Y ’ ’ ^ B B ~ ~ Û s J J J ’ . Use the GSS survey data to find the average number of siblings for people in the US in 1996 with reasonable accuracy. Confidence Intervals Questions with solutions. )�et�� f'��n ��ƀ� �5`������� Y�� FREE (33) SRWhitehouse A level Maths C2: Trig equations worksheets. stream Find a 95% confidence interval for the mean time … x��Z�o�8��A/$ VEI�(\a`����]�� }�ރjˉ�����������C�l1� �d ������ѻߣ���}���!ʖ����utus~���K�2�ٜ��(�Uy��eTeU*Etst��QE���Y��_����IU���?�cq�0?Q���>)���]_'��x��E�[�߮������^�,d�#Y�q�'E��$,Wķ�v��D�{m�n>"K J��i�&Q���f�k����������>��PIF-%�׮Z�� F����(r4�MOt+d�� ��ST�:�$"������t� y� (&~�OX� �R�u� �P�h�(z�ӵ�0��*����i��y��%�%;��i%-�[x��E����,���� -�Jb�h �$��(f�Am(�m��v�hg�{X@JC�ʟ�c��[����.

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