A spinner contains the values 0 up to, but not including, 1. The outcomes of the spinner are equally likely, so the density curve is described by a uniform distribution as shown. Let X = the random number spun on the spinner. Height = 1 0 Random number Find and interpret P (0.25 ≤ X ≤ 0.85). 0.5 0.7 0.3 0.4 0.6

A random variable x is best described by a normal distribution with μ = 30 and o =10. Find the z-score that corresponds to the value x = 35. A) 5 B) 0.5 C) 1/6 D) 3.5

I need help with parts D and C only.  Let x be a random variable representing dividend yield of bank stocks. We may assume that x has a normal distribution with σ = 2.9%. A random sample of 10 bank stocks gave the following yields (in percents). 5.7   4.8   6.0   4.9   4.0   3.4   6.5   7.1   5.3   6.1 The sample mean is = 5.38%. Suppose that for the entire stock market, the mean dividend yield is μ = 4.1%. Do these data indicate that the dividend yield of all bank stocks is higher than 4.1%? Use α = 0.01. (a) What is the level of significance? (Enter a number.)State the null and alternate hypotheses. Will you use a left-tailed, right-tailed, or two-tailed test? H0: μ = 4.1%; H1: μ > 4.1%; right-tailedH0: μ = 4.1%; H1: μ < 4.1%; left-tailed     H0: μ > 4.1%; H1: μ = 4.1%; right-tailedH0: μ = 4.1%; H1: μ ≠ 4.1%; two-tailed (b) What sampling distribution will you use? Explain the rationale for your choice of sampling distribution. The Student's t, since n is large with…

Consider a t-distribution with 9 degrees of freedom. Find the t-value so that the area to the right of t is 0.285. Question Help: Post to forum Submit Question

Find the test statistic, t, to test the hypothesis that u, u,. Two samples are randomly selected and come from populations that are normal. The sample statistics are given below. Round to three decimal places. n= 11 n2 = 18 X =6.7 X2 = 7.1 S1=0.76 S2 = 0.51 O A. - 1.546 B. -1.821 C. - 2.123 S D. -1.326 eting Click to select your answer. Type here to search hp 立

. The x² distributions take on A) positive B) negative C) positive and negative values. Wu

Select all statements that are true for density curves. The curve is symmetric and single-peaked. The curve is on or above the horizontal axis. The proportion of data values between two numbers ?a and ?b is the area under the curve between ?a and ?b. The total area under the curve is 1. The curve satisfies the 68-95-99.7% rule.

Shade the area under the standard normal curve corresponding to the probability below.  P(1 ≤ z ≤ 2 )   Question 28 options: