A manufacturer must test that his bolts are 2.00 cm long when they come off the assembly line. He must recalibrate his machines if the bolts are tc long or too short. After sampling 169 randomly selected bolts off the assembly line, he calculates the sample mean to be 2.05 cm . He knows that th population standard deviation is 0.29 cm . Assuming a level of significance of 0.01 , is there sufficient evidence to show that the manufacturer needs to recalibrate the machines? Step 1 of 3: State the null and alternative hypotheses for the test. Fill in the blank below. Answer 2 Points Keyboard Shortcuts

If a scatter plot shows points that are closely clustered together, what can you infer about the correlation between the variables?

(b) Hitung sisihan piawai bagi tinggi, dalam cm , murid tingkatan 5 Kristal dengan diteri silai min ketinggian murid tersebut adalah 155.5 cm . Calculate the standard deviation of the height, in cm , of pupils in form 5 Kristal by given the mean value of the height of the pupils is 155.5 cm . [3 markah/ marks] (c) Dengan menggunakan skala 2 cm kepada 5 cm pada paksi mengufuk dan 2 cm kepada seorang murid pada paksi mencancang, lukis histogram bagi maklumat tersebut. Using a scale of 2 cm to 5 cm on the horizontal axis and 2 cm to a pupil on the vertical cris, draw a histogram for the information.

\( 5,7,3,7,9,4,5,9,7,6,5 \) का बहलक तथा माध्यिका ज्ञात कीजिए

тета а, если: \( \sigma=3 ; n=36 ; \gamma=0,95 \) \( \sigma=3 ; n=36 ; \gamma=0,99 \) \( \sigma=3 ; n=36 ; \gamma=0,999 \)

Условие задания: стандартное отклонение равно 6, средний квадрат значений равен 98,7. Найди среднеє арифметическое. Рассмотри два варианта по значению средне арифметического с округлением до десятых. Наименьшее среднее арифметическое: