Question

Often, frequency distributions are reported using unggul dass with because the frequencies of some groups would otherwise be smell or very large Conske the foliowing data, which represent the daytime household temperature the thermal is set to when someone is home for a random sample of 127 lei Determine the dass midpointingsary, for each class and approximate the mean and standard deviation temperature Click the loan to view the frequency distribution for the daytime household temperature 61-64 Frequency distribution х 60.69 70 71-72 73-76 TT-80 Round to one despace as needed The sample mais Round to one capaces de Temperature (F) 51 64 55 67 68 69 Frequency 31 61 193 150 115 77-30 Enter your seach of the boxes Print Done O

Answer 1

Class	Midpoint
61-64	$\frac{61+64}{2}=62.5$
65-67	$\frac{65+67}{2}=66$
68-69	$\frac{68+69}{2}=68.5$
70	70
71-72	$\frac{71+72}{2}=71.5$
73-76	$\frac{73+76}{2}=74.5$
77-80	$\frac{77+80}{2}=78.5$

Sample mean :

$=\frac{(62.5\times31)+(66\times61)+(68.5\times199)+(70\times190)+(71.5\times115)+(74.5\times8)+(78.5\times46)}{31+61+199+190+115+8+46}$

$=69.73$

(please check the numbers used here. I may have wrote the frequency for the class 73-76 wrong in the above equation because it was unclear in that image. If so, please re-do the calculation for the sample mean done above before entering the final value. You can also mention that frequency in the comments.Then I will do it for you and update this answer!)