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Hogar Banco de preguntas Matemáticas Estadísticas Archive 2024 December 07

Statistics Questions from Dec 07,2024

Browse the Statistics Q&A Archive for Dec 07,2024, featuring a collection of homework questions and answers from this day. Find detailed solutions to enhance your understanding.

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The prices of 14 different randomly selected 35 -mm compact cameras are as follows: \( \$ 169, \$ 225, \$ 129, \$ 175, \$ 299, \$ 140, \$ 215, \$ 239, \$ 1, \$ 99, \$ 149, \$ 219 \), \( \$ 120 \), and \( \$ 144 \). Find Quartile 1 (Q1). 299 1 none of these 159 219 GPAs at CCSU are normally distributed with a mean of 2.47 and a standard deviation of 0.53 . Find the \( z \) - score for a GPA of 2.75 . 0.3774 0.5283 0.5849 0.5472 1.170 1.340 Determine the test statistic. \( x_{0}^{2}=7.820 \) (Round to three decimal places as needed.) Determine the P-value. P-value \( =\square \) (Round to three decimal places as needed.) Determine the proper conclusion. Do not reject \( \mathrm{H}_{0} \). The data from these samples provide Determine the test statistic. \( x_{0}^{2}=7.820 \) (Round to three decimal places as needed.) Determine the P-value. P-value = \( \square \) (Round to three decimal places as needed.) Determine the proper conciclusion. Current Does this evidence support your conclusion in part (a)? A. No. The bars and the proportions of smokers decroase as level of education increases for one, but not all of the B. Yes. None of the groups show a clear relationship with education. C. No. The bars and the proportions of smokers decrease as level of education increases for at least one of the smoker groups D. Yes. The bers decrease and the proportions of smokers increase as level of education increases for at least ane of the smoker groups (a) Test whether smoking status and level of education are independent at the \( \alpha=0.10 \) level of significa What are the hypotheses? A. \( H_{0} \) : The three smoking statuses are independent. \( H_{1} \) : The three smoking statuses are dependent. B. \( H_{0} \) : Smoking status and level of education are dependent. \( H_{1} \) : Smoking status and level of education are independent. \( H_{0}: \) Smoking status and level of education are independent. \( H_{1}: \) Smoking status and level of education are dependent. Find the test statistic. \( \chi_{0}^{2}=9.559 \) (Round to three decimal places as needed.) Find the P-value. P-value \( =\square \) (Round to three decimal places as needed.) Coffee: The mean caffeine content per cup of regular coffee served at a certain coffee shop is supposed to be different than 100 milligrams. A test is made of \( H_{0}: \mu=100 \) versus \( H_{1}: \mu \neq 100 \). The null hypothesis is not rejected. State an appropriate condusion. There (Choose one) 7 enough evidence to conclude that the mean amount spent is (Choose one) \( \nabla 100 \) milligrams. Fertilizer: A new type of fertilizer is being tested on a plot of land in an orange grove, to see whether it increases the amount of fruit produced. The mean number of pounds of fruit on this plot of land with the old fertilizer was 396 pounds. Agriculture scientists believe that the new fertilizer may decrease the yield. State the appropriate null and alternate hypotheses. The null hypothesis is \( H_{0}=\mu \) (Choose one) The alternate hypothesis is \( H_{1}: \mu \) (Choose one) P-value \( =0.608 \) (Round to three decimal places as needed.) Determine the proper conclusion. \[ \mathrm{H}_{0} \text {. The data from these samples provide } \] H1: Political Affiliation and Taxation Willingness are not independent. \( _{\text {Determine the test statistic. }}^{\chi_{0}^{2}=0.997^{\circ}} \) (Round to three decimal places as needed.) Determine the P-value. P-value \( =0.608 \) (Round to three decimal places as needed.) Determine the proper conclusion. \( \square \)
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