Suppose X ~ N(8, 6). What value of x has a z-score of
-0.4?
x = ______?
Round to one decimal place.
If your answer is a whole number, just type that number without a decimal.

Suppose X ~ N(8, 1). What value of x has a z-score of −1.25? (Enter an exact number as an integer, fraction, or decimal.) x=
A)What is the z-score of x = 4, if it is 1.9 standard deviations to the left of the mean? (Enter an exact number as an integer, fraction, or decimal.) z = B) What is the z-score of x = 5, if it is 0.166 standard deviations to the left of the mean? (Enter an exact number as an integer, fraction, or decimal.) z = C) Suppose X ~ N(12, 1). What value of x has a z-score of −2.25?...
Suppose X ~ N(2, 3). What value of x has a z-score of three?
Suppose X ~ N(2, 3). What value of x has a z-score of -0.67? If the area to the left of x in a normal distribution is 0.161, what is the area to the right of X?
Suppose X ~ N(4, 3). What is the z-score of x = 4? (Enter an exact number as an integer, fraction, or decimal.) z =
Consider the following data: x 6 7 8 9 10 P(X=x) 0.1 0.3 0.1 0.1 0.4 Step 1 of 5: Find the expected value E(X). Round your answer to one decimal place. Step 2 of 5: Find the variance. Round your answer to one decimal place Step 3 of 5: Find the standard deviation. Round your answer to one decimal place Step 4 of 5: Find the value of P(X<9)P(X<9). Round your answer to one decimal place. Step 5 of...
Use the appropriate z-score table to determine the following: a.) What z-score separates the bottom 5% from the rest? (round to two decimal places) Answer b.) What z-score separates the top 23% from the rest? (round to two decimal places) Answer c.) Suppose a data set is normally distributed with a mean of 25 and a standard deviation of 7. What data value (to the nearest whole number) would correspond to a z-score of ? Answer
Suppose that X ∼ N(-1.4,3.1), Y ∼ N(2.9,1.7), and Z ∼ N(1.1, 0.4) are independent random variables. Find the probability that 4.8X + 3Y + 4Z ≥ 9.6. Round your answer to the nearest thousandth.
21) (8 points) The Z-score for an observation from a Normal distribution is -0.4. For the following, choose the one answer that is most appropriate. a. The observation is Left of the mean Right of the mean Very close to the mean It cannot be determined without knowing the mean and standard deviation b. Observations smaller than this value comprise The majority of the distribution Slightly less than half of the values in the distribution Unusually large observations It cannot...
Consider a value to be significantly low if its z score less than or equal to - 2 or consider a value to be significantly high if its z score is greater than or equal to 2. A test is used to assess readiness for college. In a recent year, the mean test score was 22.3 and the standard deviation was 4.5. Identify the test scores that are significantly low or significantly high What test scores are significantly low? Select...