Is the estimated regression slope from part (d) statistically significant? That is, can you reject the null hypothesis Ho: B₁ = 0 vs a two-sided alternative at 5% or 1% level?

Describe about the interpret decision in terms of the original research problem.

Describe about the selecting and interpreting level of significance.

Please do not give solution in image formate  In the United States, the average baby birth weight is 7 pounds (st. dev = 1). You are a community health care provider working is rural Texas and you are concerned that the pregnant mothers may not be getting the right prenatal care because it seems that their babies are born weighing less than average. In a given rural hospital sample, the mean birth weight is 6.4 pounds for 36 babies this year. Should you be concerned?

The scores of a test for an engineering class of 30 students are shown here. (Due to the nature of this problem, do not use rounded intermediate values in your calculations-including answers submitted in WebAssign.) Scores: 81, 54, 55, 56, 96, 86, 98, 61, 90, 52, 92, 76, 66, 84, 79, 70, 71, 88, 62, 74, 53, 65, 55, 78, 79, 58, 60, 72, 51,80 (a) Determine the frequency (f), midpoint (x), and xf for each range and fill in the table below. (First, organize the scores into the following ranges: 50-59, 60-69, 70-79, 80-89, and 90-99.) (b) Using the following equation, determine the mean value (x) and fill in the table below. Σ(XA) n X = (c) Calculate (x − x) for each range and fill in the table below. (d) Calculate (x - x)²f for each range and fill in the table below. Range Frequency f Midpoint x 50-59 60-69 70-79 80-89 90-99 S = Enter a number. S = (e) Using the following equation, compute the standard deviation of the class scores. Σ(x-x) ²f n - 1 Σ(x-x) ²4 n - 1 = xf 29 X X - X (x - x)²f

what are the reasons to include omitted variables?

Please do not give solution in image formate thanku.  A school psychologist wants to determine if reprimanding in public (in front of the class) or private is more effective for curbing behavior. He randomly selects 12 students whose teachers reprimand in private and 12 students whose teachers reprimand in public. At the end of the year he determines the number of misbehaviors for each student. For the public condition and mean=7.7 and s=4.1 for the private condition mean=4.2 and s=3.5. Which method is more effective? What is the percentage of variance accounted for by the method of reprimand? What is the power of your test?

please provide the correct set of numbers for part A. Do NOT use chatgpt or AI. Please hand write the answers.