t tables

A survey was conducted to find out the proportions of boys who work in the age group 15 through 17. The results are shown. 15 year olds 16 year olds 17 year olds Total Work 51 47 58 156 Don't work 49 53 42 144 Total 100 100 100 300 At α = 0.05, find the chi-square test value and tes..

A survey was conducted in 3 towns to determine the proportions of people having pets in their home. The results are shown here. Town A Town B Town C Total Have pets 32 45 40 117 Don't have pets 53 40 45 138 Total 85 85 85 255 At α = 0.05, find the chi-square test value and test the ..

Determine the relationship between the hours worked and the monthly income of a person. Month Hours worked ( x ) Income ( y ) January 80 320 February 85 400 March 95 380 April 105 360 May 160 640 June 125 440 July 120 480 August 170 680 September 135 540 October 150 600 November 110 440 December 15..

Determine the relationship between the average number of toys sold (in lakhs) per year for a period of 10 years in a city is given. Plot the scatter diagram for the data. Year ( x ) Number of toys sold ( y ) 1995 0.5 1996 1.0 1997 1.2 1998 2.2 1999 1.8 2000 1.5 2001 2.3 2002 1.4 2003 2.0 2004 2.5 =..

The data represents the lengths (recorded to the nearest millimeter) of 40 leaves picked for an experiment. Form an appropriate frequency distribution. Find chi-square test value and check if the variable shown in the frequency distribution is normally distributed or not. Use α = 0.05 138 164..

Determine the relationship between the hours of study per day and the test scores of 10 students taken randomly. Student Hours of study ( x ) Test scores ( y ) A 6 50 B 12 75 C 8 65 D 10 70 E 12 78 F 7 65 G 12 80 H 6 55 I 14 85 J 15 90 => no relationship or negative relationship or curvilinear rela..

The table shows the total number of months in different numbers of years. Which strategy would help you find the total number of months in different numbers of years? Years 1 2 3 Months 12 24 36 => I don′t know. or multiply the number of months by 12 or multiply the number..

The table shows the maximum pulse rate for people of different age, during aerobic activities. Age (years) 20 30 40 50 Pulse rate (beats/min) 175 166 157 148 Choose the relation that best represents the table. => The pulse rate doubles with age. or The pulse rate decreases with ..

Which of the following is/are the correct method(s) for computing the expected value of a given cell in the contigency table? I. Expected value = r o w s u m × c o l u m n s u m g r a n d t o t a l II. Expected value = r o w s u m + c o l u m n s u m g r a n d ..

The table shows the total number of wheels in different numbers of bicycles. Identify the strategy used to find the total number of wheels in different numbers of bicycles. Number of Bicycles 1 2 3 Number of Wheels 2 4 6 => add 4 to the number of bicycles or multiply the number of bicycle..